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We're thinking of having a rear extension on an old, small mid-terrace. We will have to move the boiler either in to the extension or in to one of the small occupied bedrooms next to the bed. The extension would be used as a living room with a new boiler either near the tv or near the sofa...

We have a downlight transformer that I believe has broken. It powers a single GU5.3/12v bulb. However, when I took the 20-year-old transformer from the ceiling it has a post-it note stuck to it saying "24V" (where I had expected 240V) with two lines below that wires saying "N" and "PH"...

I have an Ideal system boiler (which supports opentherm) in the kitchen, cylinder upstairs on a 3-way valve. Existing digital programmer is on a diagonally opposite wall to the boiler in the kitchen (does not support OT, wires go an unknown route); analogue thermostat in the living room. With...

My parents have a non-condensing Optima 701 combi boiler in the airing cupboard on the landing. There's no room thermostat. A programmer is on the boiler but is not used (they turn boiler CH on/off when needed). I'm thinking of trying to get a Nest for them and getting it professionally...

tl;dr: Why install RF36 instead of HRE36 or Ideal Logic+ 35? How does weather comp/new thermostat differ to boiler's internal modulation? Is a non-pumped gravity shower acceptable (better than an 8kw electric) upstairs even with very old slow recovery HWC, or just go combi at 13lpm in small...