What Size Calorifier to fit

[charles_reed]

But it takes longer to heat up? if I went for 100l, it would need hours of running to heat it up, or have I missed something? I think you can have a calorifier that is too large...unless you are motoring loads....must be an idea size. or is the advice "bigger the better!"

At working revs 1 minute per litre, in rough terms.
You will not be adding to total water capacity, so I'd be careful how much you allow - say 30 litres for 6.

 

[fergycool]

I've just got a 15l vertical calorifier from Surecal. Would recommend them too. I purchased directly from them and it arrived very quickly. Almost next day! Easy to fit too.