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Discuss Boiler size in the Boilers area at Plumbers Forums

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AllyBongo

Plumbers Arms member
Plumber
Gas Engineer
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499
Pricing a job for a customer for a new boiler and a few additional rads, all the existing rads plus the new ones come to approx 25Kw in total. I was going to go for a 28Kw Vaillant open vented boiler. 25Kw seems to be cutting it a bit fine. Next boiler up is 38Kw, however vaillants can be range rated to suit. What do you guys think? Will it be enough or will I just go for the next size up? The cylinder coil is not included in the 25Kw
 
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