H
hughie999
I have a combi boiler installed in my new house. Is it possible to install solar heating panels with this system - if it is what do I need to do?
Discuss Solar Heating with Combi Boiler in the Plumbing Jobs | The Job-board area at PlumbersForums.net
You could if you installed a hot water cylinder with a twin coil but this would largely defeat the point of having a combi-boiler in the first place in my honest opinion. Solar heating is still not a good purchase in terms of payback at present and personally if you have the money to spend on one of these I would put it towards solar PV instead which offers a fairly quick payback (around 10 years).
You could if you installed a hot water cylinder with a twin coil but this would largely defeat the point of having a combi-boiler in the first place in my honest opinion. Solar heating is still not a good purchase in terms of payback at present and personally if you have the money to spend on one of these I would put it towards solar PV instead which offers a fairly quick payback (around 10 years).
It can certainly be done as ecowarm says. Put it this way, my business will be paying for a solar PV installation when we move to our next house and will be keeping the income from it as an investment. When you do the maths it's still the best earner by far with the shortest payback on the market just now. Sorry to go off topic but if you have the roof for it fill it with solar PV cells, not solar thermal cells.
Payback on most PV systems is around 10 years. I thought the payback on solar thermal was around 18, correct me if I'm wrong. All of that may change next April though if the government starts offering feed-in tariffs for thermal though.
You can't say categorically what the payback on solar is. It depends on a number of factors. I am in scotland an will only fit evacuated tubes and wouldn't fit for a house unless there are 4 users of hot water. I also crank up the boiler stat on the solar to 80 deg and fit a tmv on the outlet and generally only do it on unvented, and set the time controls on the boiler accordingly. The sizing of the cylinder is vital and all these thing maximise solar gain thus reducing the payback period. A family of 4 with two bathrooms on a 250l unvented solar with evacuated tubes in the right position could get the payback within 5-8 years easily. When you go to house and find flat plates with an old couple living there then you are looking at 13 years.
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