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Checked with Viessmann UK. Got a quick reply and Agile is right. Viessmann quote "If your Vitodens 100 Boiler has a body number beginning with 7248, you can fit an outside sensor, part no 7818116, which will give you single, fixed curve weather compensation. The new Brussels boiler...

Thanks for the replies - just back off holiday. My total gas & electric bill is £1200, House was 4 bed detached, but built extension over double garage/utility (27' x 20') now 7 bed. As I mentioned - trv's all rooms except stat room. Mostly live in kitchen/diner area and all bedroom stats set...

I've used router and jig and it works very well. Only be very careful and sure footed - ideally 2 people, 1 to hold door. I have replaced all internal doors like this with oak doors so I was worried about making a mistake and damaging expensive doors. A bit care and attention and a perfect job...

I'm just completing internals for extension over my garage. The roof is a hipped roof and tiles with marley tiles. I removed all tiles and replaced with screwed down external ply. Braced garage roof trusses and supported with acrows. Then cut off roof trusses where they were supported on the...

I use an electric plane - but be very careful these machines are very dangerous and ideally 2 people 1 to hold the door and make sure you are sure footed and plane off only 1mm max at a time. It will not take long. Plane almost to the end then plane from the other end to stop to risk of the...

Thanks again - I cannot prove the old boiler did not cycle all I can say is that with the old bellows type room stat when set above 20 deg C on really cold days every time I checked it the stat was asking for heat and I had to turn it below 20 deg C to hear/feel the click as it stopped asking...

Thanks - very good information. Lets see if I can remember to answer all the questions. I did try Sedbuk and it came out at just under 24kW. Radiator kW taken from manufacturers data found on many plumbing supply sites. Mostly showers used but washer (top loader - does not heat water...

Friends house is marginally larger than mine and 5 years old, Baxi with 26kW heat input, 24kW output. Pressurised hot water tank and combi boiler. I checked many of the web sites that calculate boiler size based on house type/size/location/insulation etc and all came out 24kW to 27kW...

Thanks for the feedback - decision made - Viessmann 100 24kW system boiler as I believe you can add weather control later and Viessmann seem to have all the bells and whistle options to control the boiler remotely - mine is in the garage. Friend of mine has a bigger house than me and he has a...

Try Fish tape from screwfix. (£10) I'd consider cutting pipe under shower and join pipe with compression fittings to extend and bring pipe out from under shower to give you more space to try compressed air/water pressure/fish tape to push blockage back the way it came then remake pipe...

Thanks - Alpha was another I'm considering. Also, what size boiler would you recommend? Detached house normal construction. I read that the heat exhanger should be ssteel. Searching the net I find there is a Viessmann 100W as well as the 200W and the weather control sensor is an optional extra...

Hi, I'm thinking of having the CH boiler changed. I've added all the radiator kW and allowed 2000W for water and this comes to 25kW. We use lots of hot water so maybe 2000W is too low - but we do not like hot bedrooms and tend to live in the kitchen diner area rather than the living room. The...