tubes are approx. 10% more efficient than flat panels. In-roof Flat panels are far better looking than tubes. In regard to heating your house solely with panels, rain is not solar.
We have to be realistic here in this country. We get a lot of rain and even though our sunlight, when it happens, will heat hot water quite successsfully, I would definitely recommend that you put in a supplementary heating boiler to look after your heating needs. You can only fit so many panels(SEI website-regulations) on a roof.
If you fit a large buffer tank with your panels you will have to plan for fiiting it in a plant room/garage which may be too far away from your roof panels. Large buffer tanks fitted in doors should be apropriately supported
1 litre water weighs 1kg eg, 1000litre buffer tank weighs at least 1000kg
We have to be realistic here in this country. We get a lot of rain and even though our sunlight, when it happens, will heat hot water quite successsfully, I would definitely recommend that you put in a supplementary heating boiler to look after your heating needs. You can only fit so many panels(SEI website-regulations) on a roof.
If you fit a large buffer tank with your panels you will have to plan for fiiting it in a plant room/garage which may be too far away from your roof panels. Large buffer tanks fitted in doors should be apropriately supported
1 litre water weighs 1kg eg, 1000litre buffer tank weighs at least 1000kg