Pompa de caldura este de fapt o instalatie termica, ce absoarbe energia din mediul exterior si o transporta in interior, realizindu-se astfel cu un singur echipament incalzirea, racirea si prepararea apei calde menajere in cladirile deservite.
Cele mai raspandite pompe de caldura sunt cele ce preiau energia din aerul exterior, asa numitele pompe de caldura aer-apa.
Daca in zona in care locuiti nu exista retea de gaze sau daca va incalziti casa electric, atunci pompa de caldura va poate reduce costurile de incalzire cu cca 30-40%.
De asemenea procesul de dezumidificare este mult mai bun decat in cazul sistemelor de aer conditionat, rezultind mai putin energie consumata si un mai mare confort in lunile de vara.
Totusi, eficienta acestor pompe de caldura scade dramatic la temperaturi exterioare foarte joase, fiind astfel nepotrivite pentru un climat rece.
Dar exista solutii si pentru un astfel de climat, si anume pompele de caldura ce preiau energia din sol sau apa, asa numitele pompe de caldura sol-apa sau apa-apa.
Eficienta unei pompe de caldura este masurata prin ceea ce numim Coeficient de Performanata. Acesta descrie eficienta maxima a unei pompe de caldura; cu cat COP este mai ridicat, cu atat pompa este mai eficienta. O pompa de caldura cu un COP de 4 genereaza 4 unitati de caldura pentru fiecare unitate de energie electrica consumata, dar atentie aceasta este eficienta maxima, raportul intre energia si caldura degajata pe toata perioada anului este un pic mai scazut.
O foarte mare importanta o au si unitatile terminale ale instalatiei. De obicei pentru o eficienta cat mai mare a instalatiei, se recomanda sistemul de incalzire prin pardoseala sau pereti, ce asigura o incalzire constanta a incaperii la temperaturi ale agentului termic de 55 oC sau ventiloconvectoarele care pot realiza si filtrarea si racirea aerului interior. Dar pentru ca cei mai multi dintre noi ne gandim doar la inlocuirea centralei termice ( din cauza costurilor enorme la factura de utilitati ), ne punem intrebarea: putem folosi radiatoarele existente la pompa de caldura? Raspunsul foarte simplu este, da. Doar ca acestea ar trebui redimensionate sau supradimensionate, suprafata radianta trebuind dublata.
Dimensionarea pompelor de caldura se face calcuind necesarul de caldura al cladirii, fiind necesari urmatorii parametrii:
- dimensiunile imobilului ce urmeaza a fi incalzit;
- zona geografica;
- posibilitatile de valorificare a sursei de caldura existente (apa, aer,sol);
- existenta altor surse de incalzire (pentru stabilirea regimului de functionare al pompei de caldura)
- conditiile de alimentare cu energie electrica (retea mono- sau trifazata, puterea electrica maxima permisa )
- necesarul termic pentru prepararea apei calde menajere.
*
Este esentiala dimensionarea corecta a unei pompe de caldura, pentru a avea un regim corect de functionare.
Sunt multi "specialisti" pe piata romaneasca, nu dam nume.....:), care calculeaza capacitatea termica raportindu-se la mp de suprafata, dupa normativele europene; astfel, daca avem o casa de 150 mp, "bine izolata" si am calcula necesarul de caldura cu 50W/mp, ar rezulta o putere termica de 7.5 KW, indiferent de zona geografica in care se afla casa. Va vine sa credeti? Mie nu. Mai mult decat atat, dupa aceasta "dimensionare orientativa" se alege o pompa de caldura cu o anumita capacitate termica si un anumit COP, nespecificindu-se ca aceste date sunt furnizate de producator pentru anumite conditii de lucru: temperatura ambientala, tipul de incalzire ( in pardoseala/pereti sau ventiloconvectoare ) si cel mai important gradul de izolare al cladirii.
Investitia intr-o pompa de caldura nu este rentabila, daca nu se iau in calcul si aceste conditii.
Pentru cei care indeplinesc aceste conditii, o casa foarte bine izolata si sistemul de incalzire gandit altfel decat cu clasicele radiatoare, va invitam sa studiati oferta noastra de pompe de caldura aer-apa si pompe de caldura sol-apa ,aici.
The simple answer to the question can you use radiators with an air source heat pump is yes!
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
- See more at: http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpuf
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
- See more at: http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpuf
The simple answer to the question can you use radiators with an air source heat pump is yes!
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
- See more at: http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpu
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
- See more at: http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpu
The simple answer to the question can you use radiators with an air source heat pump is yes!
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
- See more at: http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpuf
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
- See more at: http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpuf
Can you use radiators with an air source heat pump?
Posted by John Lightfoot on 24 January 2011 at 9:47 am
The simple answer to the question can you use radiators with an air source heat pump is yes!
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
Heat pump information page
An introduction to air source heat pumps
Air source heat pumps keep guests warm, happy and intrigued
10 questions to ask when choosing your air source heat pump installer
Photo by Ruthanne Reid
- See more at:
http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpuRadiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
More information about air source heat pumps from YouGen
Using an air source heat pump with an existing heating system: 5 key things to considerHeat pump information page
An introduction to air source heat pumps
Air source heat pumps keep guests warm, happy and intrigued
10 questions to ask when choosing your air source heat pump installer
Photo by Ruthanne Reid
Can you use radiators with an air source heat pump?
Posted by John Lightfoot on 24 January 2011 at 9:47 am
The simple answer to the question can you use radiators with an air source heat pump is yes!
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
Heat pump information page
An introduction to air source heat pumps
Air source heat pumps keep guests warm, happy and intrigued
10 questions to ask when choosing your air source heat pump installer
Photo by Ruthanne Reid
- See more at:
http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpufRadiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
More information about air source heat pumps from YouGen
Using an air source heat pump with an existing heating system: 5 key things to considerHeat pump information page
An introduction to air source heat pumps
Air source heat pumps keep guests warm, happy and intrigued
10 questions to ask when choosing your air source heat pump installer
Photo by Ruthanne Reid
Can you use radiators with an air source heat pump?
Posted by John Lightfoot on 24 January 2011 at 9:47 am
The simple answer to the question can you use radiators with an air source heat pump is yes!
Radiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
Heat pump information page
An introduction to air source heat pumps
Air source heat pumps keep guests warm, happy and intrigued
10 questions to ask when choosing your air source heat pump installer
Photo by Ruthanne Reid
- See more at:
http://www.yougen.co.uk/blog-entry/1606/Can+you+use+radiators+with+an+air+source+heat+pump%273F/#sthash.JZF0fIQ5.dpufRadiators need to be sized for the flow temperatures your heat pump will be set to. The lower this set point, the more efficient your heat pump will be, and therefore the cheaper to run. The disadvantage of lower flow temperatures is, however, that the lower the water temperature, the more radiating surface area you need to emit the same amount of heat.
So if you currently have a oil fired boiler powering your heating system, with flow temperatures around 80C, and you exchange that boiler for a heat pump with flow temperatures of, say 50C, you will need radiators double the size, or double panel radiators where you currently have single panel radiators, or two radiators in a room where you currently have one. If you set your heat pump to have even lower flow temperatures the radiator size will increase accordingly.
You will hear many people referring to over-sizing the radiators for heat pumps. I prefer to use the more appropriate term, right-sizing the radiators. All your heating engineer, or radiator supplier, will need to know, is the heat output you require from the radiator and the flow and return temperature to determine the size of radiator(s) you need to provide the amount of heat output you require.
If the radiator is sized correctly it will not matter what type it is, panel, decorative or skirting etc. they will provide the heat you require.
You will often hear that underfloor heating should be the only type of heat emitter you consider when using heat pumps. The fact that underfloor system can work very well with flow temperatures as low as 35C do make them an ideal partner for heat pumps. If, however, you have an old property it may be impractical to install an underfloor heating system, and in many cases correctly sized radiators are the only practical option.
The other question people often ask if swapping out an oil boiler for a heat pump is – “Can I use my existing radiators”? This is not such an easy question to answer!
Your existing radiators can be used, but as explained above they might be too small, in which case you might need to add additional radiators into the system. Your heating engineer will also need to ensure that your system has been thoroughly cleaned, to make sure that suspended particles in the system do not clog up the filter they will install; to protect the heat exchanger in your heat pump from getting blocked (a very expensive item to unblock).
Of course every installation is different and my advice above is somewhat generic. The best advice of all is, call in an expert to survey your installation and they will let you know the best options open to you.
More information about air source heat pumps from YouGen
Using an air source heat pump with an existing heating system: 5 key things to considerHeat pump information page
An introduction to air source heat pumps
Air source heat pumps keep guests warm, happy and intrigued
10 questions to ask when choosing your air source heat pump installer
Photo by Ruthanne Reid
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