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Have just spoken to Worcester Bosch who think the boiler, which has a maximum heat output of 25kwh is far too small for the property which has 19 radiators and it is having to work flat out all the time to heat the house instead of modulating down. They have said that flat out the boiler will...

Dear Moggett, I think you may be confusing my replies with one of the other respondees. April - September I used 90 units per the gas metre i.e. the one British Gas read from. I gather this translates to 990 KWH of gas for the 5 month period when we had no heating on but we are not there...

It is definitely a 35 CDi. One of the heating engineers told me it was split 25 to heating and 10 to water so perhaps they got that wrong. If it is rated at 3.5 cu metres of gas per hour, does that mean that is what the boiler will consume if being used to capacity i.e. at full capacity, the...

Dear Dan, Thank you for your help with this. We thought it must be the metre and British Gas took the old one away to be tested last February. They said the test results were inconclusive and installed a new one. The new one is giving these readings as well. Since I wrote the first...

Gas metre is cubic metres and the bill is the metre reading times a factor of about 11 to reach kwh then times the price. This is how I have worked out that one unit of gas per the metre feeds the boiler for 27 minutes and this amounts to 25 kwh per hour. If we have heating in the winter for...

Thank you for your comments and for taking the time to respond. We have two room thermostats for two central heating zones and every radiator but for towel rails has thermostatic control. Just dug up some wooden floor boards ( not because of your question) due to heating engineer, all pipes...

We have a 10 year old Worcester Bosch 35CDI boiler. Possibly, a little undersized as its heating output is 25 and water 10 and we have 18 radiators. Last summer, April - September we used 90 units of gas in total, when using system for hot water only. Over the winter we have been consuming 30...

Thank you all for your comments. The house has had its cavity walls filled and the loft is fully insulated. I an currently draft proofing everywhere. Worcester Bosch did a full boiler service immediately after we bought house and raised no issues. Would they have checked to ensure it was...

Hello, we bought a new house a year ago and it is using about £80 of gas per week at the moment - around 150 units per week for a 4 bedroom house with 2 bathrooms. We run heat for 2 hours in the morning at 20 degrees and 6 hours at night and heat water for around 5 hours morning and evening...