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Sorry, I'll do the heat-loss calc over the weekend and will post my findings! :)

I've since relocated the room stat to the hall (both small radiators in there don't have TRVs), but thanks :)

Hi guys, Been doing some monitoring of our gas usage over the last couple of weeks. We don't appear to have a gas leak, though I'm still waiting for the plumber to come over to have a look at the boiler etc. In the first week (before any changes) which was about 5° avg temp I'd say, we...

Thanks (again) :) There are 2 small radiators in the hall, one has a TRV and one doesn't - I should remove the one that does then? This is the one that's near the lounge door, while the one without a TRV is by the porch door. Will let you know how I get on with the SmartMeter!

Upgrade: good find with the BG loft insulation, they're coming out on Friday to do a survey. Also going to see if the wall cavities have been done. I have the room stat set to 19 during the day, and back to 15 at night, so similar settings to you. 1. I've now re-located the room stat to...

lol; just want to make sure all the bases are covered and I have all the facts so I can be paying for the minimum amount of gas I need :) But, yes, I do tend to over-think things :)

Thanks Upgrade, I'll sort the insulation over the next couple of days. I wonder if it'd be beneficial to get a competent plumber in to test everything; as it does seem very excessive, even with moderate loft insulation/inefficient settings etc. Trouble is finding one; the two I've had over so...

I assume your room thermostat is in your hall (or another room) then, rather than lounge etc. (presumably the rooms that are 20/21°)? I'm not over-obsessed (not that that would be a bad thing, as details do matter - making a small change in a number of areas, can add up to a significant...

Thanks for this; I'll definitely get some decent loft insulation up there, seems to be pretty cheap. I'm trying to find out why my first gas bill was £65/month, and the second was £175/month, despite temperatures not being all that lower; but certainly I'll do everything I can re insulation...

Thanks for your reply: 1. We are with BG, and I'll enquire about the tariff; though we weren't notified of an increase, and it's still 270% higher rather than 40%... 2. Thanks, I'll remove them again. The lounge seems to get hotter much quicker than other rooms downstairs (with the rads on...

Good theory, but...we only paid for the exact gas we used, as I told them the meter reading the day we moved in, and then up to our bill date; so it's exact usage rather than estimates, and certainly not based on the previous owner unfortunately. I wish it was that simple, a 2.7x increase just...

The house isn't exactly huge, but a moderately-large 3-bed detached (dormer bungalow); with conservatory and integrated garage inc utility room. uPVC DG, and moderate insulation (going to improve it). My parents' and friend's house is about the same size and also detached, both also work from...

The bill we got was literally 3x what it had been for the previous 3 months; and the temperatures weren't all that much lower. The only thing I'd done differently was to relocate the room thermostat from the kitchen to the lounge (as advised by the plumber), and then remove the thermo valves on...

Thanks Alec, I've now removed the radiator covers; replaced the thermo valves on the 2 lounge radiators (where the room thermostat is), both set on 3 so slightly above the 18.5° of the room thermostat; reduced the temperature of the radiators in some of the rooms we don't need as hot. I'm...

Thanks for all your help guys, and sorry for the delay in replying! The boiler is MAIN Combi 24 HE. I was advised to remove the thermo valves on the 2 radiators in the lounge (the main thermostat is in the lounge), but our gas usage has significantly increased (3x) since around the time we...

The loft looks to be relatively well insulated, but I'll see if it's 10-12" as you recommend, thanks. The boiler was serviced just 3 months ago. Is it better to have the boiler on lower, and the thermostat on higher, or vice versa? And where do the individual radiator thermostat valves...

Many thanks for your lengthy reply Muggles, it's appreciated. I'll have a good read through your reply, and will get back to you shortly (if you need me to!) when I'm back home!

No worries, I would rather pay someone to genuinely help in a friendly, "professional" manner; rather than get "free, professional advice" that apparently has to come with an attitude... :|

No need to be condescending! It was more general advice I'm looking for, rather than model-specific information. Just how a central heating system should generally be operated to be most effective and economical, regardless of the specific model of the components. It's a gas central heating...

Hi, After some advice hopefully if anyone can help. Just moved into a detached house, which is costing a LOT in gas bills, so I just wondered what the best way was to be operating the central heating (radiators with combi boiler). The house gets relatively cold as it doesn't get any sun in...