Wol

I am desperately trying to get informed quotes for my new build central heating / A/C system.

I am reasonably happy with the energy requirements that several companies have come up with for the A/C (18Kw) but the heating requirements are wildly different.

I did find one website which allowed you to fill in boxes for wall lengths, insulation, window sizes etc and came up with a heating figure of about 35Kw.

One quote says 30 Kw is sufficient, another 50Kw! Knowing that here the standards are so poor compared with Europe I would like to have another DIY try at estimating myself: does anyone know of an online heating calculator which I can use to confirm any of the quotes, please?

Wol

Bump - I'm that desperate!

daveplumber

Hi i dont work in kw only btu's try www.heatershop.com/btu_calculator.htm
allow 15000 btus for your hot water
Dave

phillip&sharon

What do you do when you go and buy a boiler here, they only give you them in kw now. R u like me can only work in btu's.
phillip.:

iceman

Assuming that you are using heat pump (known as reverse cycle) system to heat as well then the heating requirement depends on a number of factors. You can PM me the details if it helps as it's my profession and I will point you in the right direction.

Wol

Many thanks: I've put in the overall sq. footage and the heating requirement comes out at 33.5 Kw with "average" insulation and 16.77Kw with good. That corresponds with 33.84Kw from a program I used previously. However, it's a very broad-brush program - no allowance for window area, external/internal wall ratio etc.

Wol

No, it's gas fired: the BASIX requirement makes it so. Thanks, and I will PM you now!