not sure if it matters? new boiler seems large for house

[cypher007]

did a rough working out and the plumber has fitted a 24kw intergas OV on our 4 bed which according to some whole house calcs only needs about 10kw, and that's without taking out the integral single garage.

it an old Alison build from 1967, but its double glazed cavity wall insulated and the loft has about 200mm. the extension is over the old single garage.

the distance from front to back is 7.32m side to side is 8.3m.

its dose have quite large windows though and a 250L unvented DHW tank.

 

[joni os]

Heating not only concern. With 250 litre DHW cylinder recovery time taken into account. In this case it will be about 40minutes.

 

[rocketmanbkk]

It's a bit late if you were informed & its been fitted

 

[jtsplumbing]

maybe he's down rated the boiler ! have you asked

 

[ShaunCorbs]

sounds about right tbh i would of put a 18-24kw in and do room by room heat loss calcs if your that bothered

and 5-8kw for your cylinder so thats 16-19kw for your house

 

[gmartine]

The 24kw model also modulates down to 7.2kw so given your calcs it can still operate efficiently even if there is no HW demand.