D_Hailsham
So if you want to deliver 15 litres/minute of hot water with a temperature rise of 35C your boiler will have to produce nearly 37kW.
Needed a 1500Ltr sectional storage tank and a 6bar pump.
3 x Gemini 500Ltr unvented calorifiers at 5bar, and 54mm copper pipe, 28mm to each shower.
An average older three bedroom semi in the UK usually works out at about 10-12 kW for heating and then you add on 2 kW for water heating.
An average older three bedroom semi in the UK usually works out at about 10-12 kW for heating and then you add on 2 kW for water heating.
This is what you posted on another thread Agile, yet in my particular case the advice seems to be that if your incoming main is good, (mines 14ltrs per min) you may as well put in a combi big enough to deliver this, so far it looks like I would need a 30kilowatt boiler or more mines an average three bedroom semi.
Yeah, you`re right sorry, misunderstood because OP was originally talking about a Vokera combi. So what`s your take on it DIY, High flow rate, put in a large KW boiler for hot water? ( combi ). I`m talking about my situation here.
Just been on the Wiki section of the Forum and it states there that sizing a combi to DHW requirements is not the correct way to do it.
The boiler will modulate right to to whatever the heating load is, bit like a pan simmering.
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