from a heat pump and it simply not true. from actual a heat pump and it simply not true. from actual experience and our members from actual experience and our members experience you are mainly heat pump members experience you are mainly heat pump installers what we find is that you heat pump installers what we find is that you might need to replace two or three that you might need to replace two or three radiators. that you might need to replace two orthree radiators. it that you might need to replace two or three radiators. it certainly not a given or three radiators. it certainly not a given that or three radiators. it certainly not a given that you have to room replace a given that you have to room replace every radiator but a good engineer replace every radiator but a good engineer and replace every radiator but a good engineerand a good replace every radiator but a good engineer and a good installer coming to your engineer and a good installer coming to your house