EcoRenovator - View Single Post - Retrofitting existing boiler heating to heat pump

Mikesolar · 04-14-16, 04:35 PM

Creeky,
I would, without hesitation, say that this can be done. Unless old cast iron rads are available cheap or free, then the next best thing is the Stelrad type of radiator which is the standard all throughout Europe. It is not too hard to size them up (in a back of the envelope sort of way) and if done right, she won't need the boiler at all. The HP can do the whole job. That said, I would keep the existing boiler in place as a second stage, just in case.

I would avoid, at all costs, any type of fin tube "convector" similar tot he middle one in ACs post as they are the least efficient thing on the market. Also, the one at the bottom will be prone to failure (it is electric after all) and possibly a bit noisy over time.

I've got 2 just like this up and running this year and I'm doing my own house this way as well.

04-14-16, 04:35 PM	#5
Mikesolar Master EcoRenovator Join Date: Aug 2012 Location: Toronto Posts: 958 Thanks: 40 Thanked 158 Times in 150 Posts	Creeky, I would, without hesitation, say that this can be done. Unless old cast iron rads are available cheap or free, then the next best thing is the Stelrad type of radiator which is the standard all throughout Europe. It is not too hard to size them up (in a back of the envelope sort of way) and if done right, she won't need the boiler at all. The HP can do the whole job. That said, I would keep the existing boiler in place as a second stage, just in case. I would avoid, at all costs, any type of fin tube "convector" similar tot he middle one in ACs post as they are the least efficient thing on the market. Also, the one at the bottom will be prone to failure (it is electric after all) and possibly a bit noisy over time. I've got 2 just like this up and running this year and I'm doing my own house this way as well.