What size boiler?



I have 22 rads two bathrooms and two heating zones (upstairs and downstairs) and a 250litre unvented cylinder. I want a worcester bosch boiler but what size would be best?
Sponsored Links
Sponsored Links
Well you need approx 8kW for your hot water demand.

As for the rest, it's impossible to know without knowing either the total heat loss for your rooms, or the type (manufacturer & size) of your radiators.

Assuming an average of 1.5kW per rad, you should just be OK with a 40kW boiler, but without working out the heat losses there's no way of knowing.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local