During the week, I work from home and have the heating just to heat the Study. Evohome does a good job of heating just a single room. But would it be better to turn the entire heating system off and just have a single electric radiator in the Study? Any opinions. What about running costs.
Run a single radiator using Evohome or invest in an electric radiator
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I guess I will have to work out how much gas I use up during the day to keep the Study heated. And then work out how much it would cost to run an Electric heater for that time. But then also add some more gas to account for the fact that the house then will be heating up from a colder starting point again in the evening.
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Originally posted by bruce_miranda View PostI guess I will have to work out how much gas I use up during the day to keep the Study heated. And then work out how much it would cost to run an Electric heater for that time. But then also add some more gas to account for the fact that the house then will be heating up from a colder starting point again in the evening.
I've measured our usage, yearly and monthly to find the most efficient way of running our system. Obviously weather conditions aren't consistent but the overall view is that it uses less gas, not a lot but less for it to be on all day.
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Originally posted by bruce_miranda View PostYes my entire house is heated all day but to about 17C, except the Study which goes to 20C. I wanted to know if this was the most efficient way to deal with my single occupancy during the day or invest in something more localised.
Assume a 2kw electric heater. If it runs for one hour at full blast it uses 18.4p * 2kwh = 36.8p (based on default tariffs in my area).
Using gas heating, a 2kw radiator would cost 3.7p * 2kwh = 7.4p. It could run for five hours and still be cheaper than one hour of an electric heater.
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Quite an interesting one and so many variables of course, depending on insulation, room size etc.
Taking out pipe runs and associated heat losses, added cycles on the boiler and so on, I suspect there's little in it.
My tariffs are lower than quoted but the ratio's similar. The 'thermal inertia' of a space eg an office matters. Heating a space like that needs to be agile and recognise that a person isn't necessarily moving so much. Indicative temperatures sometimes don't feel so comfortable.
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I often run my heating the same way, i.e. the house is at a low temperature when I am in my study with only the study being heated. One of the advantages of Evohome. Even though downstairs rooms are set at 19c during the day, the heating often does not come on and when it does not for long to sustain that temperature. Like other contributors here I assume that an electric radiator will cost an awful lot more to run.
Having said that in due course I will remove a radiator in the conservatory as it is not very efficient, with the HR92 fitted mid winter I hear the boiler fire up in the night because the temperature has dropped below the minimum you can set of 5C. When I want it on it can struggle to get a decent temperature. I think an electric panel radiator will be more efficient but I doubt if I will recoup the capital cost. In the UK I believe one cannot now install a radiator in a conservatory that runs off the CH system.
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Originally posted by bruce_miranda View PostReally, so what are they expecting in a conservatory? UFH? or are they trying to force the fact that it's in no way integral to the rest of the house, so shouldn't use the supplies of the house?
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Originally posted by G4RHL View PostHaving said that in due course I will remove a radiator in the conservatory as it is not very efficient, with the HR92 fitted mid winter I hear the boiler fire up in the night because the temperature has dropped below the minimum you can set of 5C. When I want it on it can struggle to get a decent temperature. I think an electric panel radiator will be more efficient but I doubt if I will recoup the capital cost. In the UK I believe one cannot now install a radiator in a conservatory that runs off the CH system.
I use this heater. It heats the entire space in about 15 minutes. Extremely effective and I use it only for about an hour a day when I want to eat dinner. It's pricier than a standard oil-filled radiator, but it heats up almost instantly and according to the literature is substantially more efficient than a oil-filled radiator.
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Originally posted by rs1987 View PostYes, this is exactly what I do. My conservatory was re-purposed as a dining room, so I do need to use it. However, the central heating struggles to heat it even to 15 degrees in this weather and the problem is compounded by the fact that the radiator is about half the size it should be, so the gas bill literally goes through the roof if I attempt to heat the conservatory using mains gas.
I use this heater. It heats the entire space in about 15 minutes. Extremely effective and I use it only for about an hour a day when I want to eat dinner. It's pricier than a standard oil-filled radiator, but it heats up almost instantly and according to the literature is substantially more efficient than a oil-filled radiator.
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