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Actually its not just extracting more heat form the flue gas that just happens to produce condensate as a byproduct that gives the increase in efficiency. it takes a hell of a lot of energy to turn water into steam and you have to extract a hell of a lot of heat from steam at 100'c to turn it...

Tony, I don't have double glazing because it's a listed building in a National Park (don't go there!) I was lucky that they alllowed me to have an inside toilet!. I have used the art of balancing the system such that TRV's are unneccessary (and just something else that leaks or sticks) As I...

In a 1970's house there is obviously something wrong if the static pressure is 2.5 bar but the header tank stops filling if you turn on the kitchen tap, there will be a restriction in the line somewhere, also, does the header tank really stop filling or does it just go quiet when the pressure to...

What are you talking about?

British Gas Quoted over £2000 to replace an aged potterton with a combi, bearing in mind that BG would be getting the combi direct from manufacturer at less than £500 thats over £1500 for the same job our man wants £500 for

Check that your incoming stopcock is fully open, so many clients I come across like to have it just cracked open for some bizarre reason, if it was an old place on lead pipes I could understand low flow with 2.5 bar static pressure but a 1970's place sounds like there's something else to...

The main bearing on our washer is getting noisier on spin, an engineer said over the phone a new drum would be needed bin it and buy another but the bearing is available as a spare so I thought if I can strip & rebuild cars and bikes, a washing macine bearing can't be that hard, just whip the...

The main rcd should not be the same rating as the rcd's further down the line, the very least that will need doing is to change the main rcd for a 100mA but as pevious posts have said the whole system needs checking by a qualified spark. The RCD would be about £60 and a 10min job to do but by...

Had a similar problem with a dishwasher tripping the RCD, turned out to be a duff heating element

You can get expanding foam specifically for fixing plasterboard, if you want to use screws they need to be 70-90mm long and a coarse thread

Obviously if the partition is perpendicular to the ceiling joists then find one using a metal detector to find the nails or simply push a screwdriver through along a line that will be covered by the head rail of the partition untill you find a joist, the next one will be about 400mm along. If...

Simond You sound like the typical head up own rse gas fitter! No a weather compensated boiler won't do what I want it to do and the recovery systems you mention are typically used with non condensing combis. The rads in the systen were sized to give required heat output even on the coldest...

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Hello I recently spent some weeks doing alterations to a house that had ASHP fitted I think it was a Mitsubishi unit, I never really noticed the noise as being intrusive, similar to a large desk fan on full speed, double glazing kept what noise there was out and if it was warm enough to sit in...

From my O level physics and 15 years working on chemical plants, this is what I understand about condensing boilers. When a hydrocarbon such as natural gas burns it produces carbon dioxide and water vapour. hard fact. The latent heat of vapourisation is the large amount of energy it takes...