Wednesday 14 October is the day that poll was published, at 00:01 BST, and it is also a windy day in the north. The heating decision is indoors. A plug-in heater priced against the boiler sits on the plug-in heater page. The first time you fire the boiler this autumn sits on the first-fire page. A radiator that stays cold at the top, when you wanted it hot, sits on the bleed page. This page is the choice to heat the rooms you actually use, before Friday’s cooler air, and the point at which that choice becomes a fault.
Read the live forecast again before you treat Friday as fixed. A later update can move the rain and the temperature split. The room you sleep in still wants to be warm enough to sit in, on a mild Wednesday afternoon or a fresher Friday morning.
What Friday’s forecast is asking you to decide
The Met Office week-ahead note, published on Tuesday 13 October 2026, describes a front sliding south through Wednesday night and Thursday. South of that front, daytime temperatures can still reach 20°C or 21°C. North of it, they may sit around 12°C or 13°C. On Friday the same note says temperatures could be around six degrees lower across parts of England and Wales than earlier in the week, with Scotland and Northern Ireland around 12°C or 13°C, and showers still feeding into northern and western areas on a cooler north-westerly. High pressure is expected to build over the weekend, and the week is due to feel distinctly fresher by the end than it did at the start.
That split is why a London headline of 20°C on Thursday is a poor guide for Glasgow, Edinburgh, Aberdeen, Newcastle or Belfast. If you are already on the cool side of the front, the room check is for tonight. If you are still south of it, Thursday is the last mild day in that note, and Friday is when the same rooms will feel different. The national forecast, in the text updated at 03:00 UTC on Wednesday 14 October, says Friday to Sunday turns much cooler than of late as high pressure builds. The outlook for Sunday 18 October to Tuesday 27 October on that page keeps temperatures around normal for the time of year, with frosty mornings in the usual prone areas.
Today’s yellow wind warning is a separate job, and it is not a UK-wide one. The Met Office warnings page on 14 October listed a yellow wind warning for Highland and Na h-Eileanan Siar from 10:00 to 19:00 (UTC+1), issued at 08:51 UTC+1 on Tuesday 13 October. The further detail on that warning gives gusts of 50 to 60 mph widely in the warned area, and around 70 mph on some exposed coasts and hills late in the morning and early in the afternoon, easing from the west through the late afternoon and early evening. The same page showed no warnings from Thursday 15 October through Tuesday 20 October, and it also carried a notice that the list might be out of date. Read the live warning for your postcode. The Met Office storm page says stay indoors as much as possible while a storm is in progress, and do not go outside to repair damage until it has passed. Loose items in the garden are the garden-before-wind page. The dial on the wall is the job you can do from the hall.
The poll is a reason people are having this conversation. It is not an official count of every home. Opinium asked 2,000 UK adults from 22 to 25 September, and The Independent reported the figures on 14 October. Alongside the 29% who plan to heat only some rooms, the same piece says 5.7% (about 1.7 million households, on the poll’s scaling) do not plan to turn the heating on at all, 40% will turn it on only if they get too cold, and 18% will wait longer than they did last year. Among those planning to go without heating, 19% said they would use a portable heater, an open fire or a log burner instead. Those are different appliances. They are linked further down. They are not a reason to leave the rooms you live in cold.
The rooms that should stay at 18°C
The NHS page Keep warm and get help with heating says heat your home to a temperature that is comfortable for you and, if you can, at least 18°C in the rooms you regularly use, such as the living room and the bedroom. It says that is particularly important if you have a health condition, and that bedroom windows are best kept closed at night. The page is written for England. It also names who is more vulnerable in cold weather: people aged 65 and over, babies and children under 5, people on a low income who cannot afford heating, people with a long-term health condition or a disability, pregnant women, and people with a mental health condition. If someone in the house is in that list, the room they sit in and the room they sleep in stay on the 18°C side of the decision. A spare box room can be cooler. Their bedroom should not be the room you experiment on.
Uswitch’s spokesman, quoted in the same Independent piece, put the living-space minimum at 18°C for healthy adults and 20°C for infants and older people. That is the company’s line, reported by the paper. It is not an NHS figure. Where the two differ, follow the NHS page for health, and treat 18°C as the floor for rooms in daily use if you can afford to heat them. Energy Saving Trust’s heating-controls guide puts a comfortable room thermostat for most people between 18°C and 21°C, and says comfort and health come before energy savings when someone is older, has a condition that makes them vulnerable to cold, or spends the day at home.
If the bill is why the heating stays off, the NHS page points to the government energy helpline on 0800 444 202, and to GOV.UK for benefits and bill support. The Warm Home Discount is a one-off £150 off the electricity bill, applied by the supplier rather than paid as cash. GOV.UK says the scheme reopens in October 2026. This page does not decide who qualifies. Schemes this directory explains in full, such as the Boiler Upgrade Scheme, are on the grants list.
How to turn rooms down without turning the house off
Do this in daylight, with the heating either off or already running normally. You are changing settings the controls were built for. You are not opening the boiler case, and you are not draining a radiator.
- Read the room thermostat. Set the lowest temperature that is still comfortable. Energy Saving Trust says that for most people that sits between 18°C and 21°C, and that you do not turn it up because the air outside is colder. The house still aims for the number on the dial. On a cooler Friday it may take longer to get there, so bring the on-time forward. Raising the set point does not make the boiler heat the rooms any faster. Their one-degree example, from 22°C down to 21°C, is about £120 a year in Great Britain and £80 in Northern Ireland. That is their estimate of using the control, not a refund.
- Read the programmer. Friday 16 October is before the clocks go back. The one-hour check for 2am on Sunday 25 October is on the heating-clock page. For this Friday, confirm the on periods match the morning and evening you are actually in the house. Energy Saving Trust describes a single channel on many combi boilers, because hot water is made when a tap is opened. A system or regular boiler with a cylinder often has a second channel for hot water, and sometimes a third when upstairs and downstairs are separate zones. Leave the hot-water channel alone if people still need baths and taps. Switching that channel off does not make the radiators cheaper in a way you can see tonight, and it can leave a cylinder cold.
- Walk the radiators in rooms you use less. A thermostatic radiator valve, the numbered head on the pipe, lets you turn that room down. Energy Saving Trust says the numbers are not the same temperature on every model: lower means cooler, higher means warmer. If you do not know the valve, start in the middle and then take a spare room a step lower. Their example on the controls-in-use page, a note dated 11 September 2026, is about 3 to 4 in rooms you use most, and about 2 to 3 in bedrooms and rooms you use less. Treat those as a starting point, then judge the room, because the scale is not a thermometer.
- Keep some heat in the rooms you turn down. Energy Saving Trust says it is usually best not to leave rooms completely unheated for long periods in colder weather. Background heat reduces the risk of condensation and mould, and the room is easier to warm when you do use it. With frosty mornings in the outlook from Sunday 18 October, a valve left on 0 in a room on an outside wall is the setting to avoid. The white pipe outside a condensing boiler is a different freeze, on the condensate-pipe page.
- Leave a clear space around the valve head. Energy Saving Trust says a radiator cover can trap warm air around the valve, so the valve shuts early and the room stays cooler than the number you chose. Curtains, a sofa and a drying rack do the same thing if they sit on the head. Pull them off the valve. You can still close the curtains over the glass in the evening.
- If the only thermostat is in the hall, leave that hall radiator able to heat the air around the thermostat. A valve turned down in that one spot can shut the radiator the thermostat is measuring, so the boiler keeps running while the rooms you care about never settle. If upstairs and downstairs already have separate thermostats, set each one for the hours that floor is in use. That is what Energy Saving Trust describes as zone control. Fitting it is an installer’s job, covered below.
A hot-water cylinder has its own thermostat. Energy Saving Trust says set that to 60°C, hot enough to limit harmful bacteria and hot enough to scald, so you still mix cold at the tap. On a regular or system boiler with one dial for radiators and the cylinder, they say that dial needs to stay high enough to heat the cylinder to 60°C, and they put that boiler setting no lower than 65°C. The radiator valve in a spare room is not that dial. The flow-temperature page is where the boiler dial is explained. Leave the cylinder at 60°C while you turn unused rooms down.
If you smell gas, leave the dials alone. In England, Scotland and Wales the gas emergency line is 0800 111 999. In Northern Ireland, nidirect gives the gas emergency line as 0800 002 001. Do not use a switch on the way out.
Which room gets which setting
Use the table as a walk round the house, not as a promise that every valve marked 3 will read 18°C. The NHS floor applies to rooms you regularly use. Energy Saving Trust’s lower settings apply to rooms you can afford to keep cooler, with the background heat they still recommend.
| Room | What to aim for | Stop and rethink |
|---|---|---|
| Living room, and the bedroom someone sleeps in | At least 18°C if you can, particularly where someone has a health condition or is in an NHS at-risk group. Thermostat in the 18°C to 21°C band Energy Saving Trust gives for most people. | An infant, someone over 65, or anyone unwell is being left in a cooler spare room instead. |
| Spare bedroom or box room | TRV turned down, not fully off, so the room still gets background heat through the cooler spell and the frosty mornings in the Sunday-to-Tuesday outlook. | The outside wall is damp, or the glass streams on the room side for days. That is the mist page or the damp page, not a lower number on the valve. |
| Hall | Energy Saving Trust’s “when to put the heating on” note, dated 28 September 2026, says a hall can sit lower than a living room. Keep the radiator beside a hall thermostat able to heat that thermostat. | The hall valve is shut and the boiler never seems to switch off. |
| Kitchen | Often lower while you are cooking, then back to a normal setting when the room is in use as a sitting space. | You have blocked the extract fan or the trickle vents to hold the heat in. |
| Room with the hot-water cylinder | Cylinder thermostat at 60°C. The spare-room TRV does not change that. | One boiler dial serves both heating and hot water, and you have turned it down so far that the taps run cool. Use the flow-temperature page. |
Energy Saving Trust also describes a setback on a programmable thermostat: the minimum you will accept when you are out or asleep. Their example is about 20°C while you are in and awake, and about 12°C to 15°C overnight or while the house is empty. They say you may need a higher minimum if someone is older, has a health condition that makes them vulnerable to cold, or is at home for long stretches. Use the setback for an empty house. Do not use 12°C as the daytime target for a room the NHS says you regularly use.
Doors, vents, and a room that starts to sweat
Closing the door of a turned-down room keeps the warmer air in the rooms you are using. That is the whole point of heating some rooms harder than others. Do not tape the door, block the trickle vents, or stop the bathroom and kitchen fans. Those paths are how the house gets rid of moisture from cooking, showers and breathing. The NHS line about closed bedroom windows at night is about the room you are sleeping in, already aimed at 18°C. It is not an instruction to seal a cold spare room shut for a fortnight.
Mist on the room side of the glass, after you have turned that room down, is moisture. The window-mist page separates that from mist trapped between the panes. A patch that grows on an outside wall, or that gets worse after rain, is the damp-patch page. Energy Saving Trust’s reason for background heat is this exact risk: a room left cold collects condensation and then mould. If you can already see mould on the cold wall, turn that radiator back up, wipe only what is surface moisture, and ventilate. A stain that tracks in from outside is not cured by a higher number on the valve.
Furniture pulled off the valve, curtains closed over the glass after dark, and a door shut to the spare room are the three moves that match the poll’s “only some rooms” plan without fighting the boiler. A rug over a radiator, or a cover built around it, works against the valve, as Energy Saving Trust describes. Heat the air in the room. Do not store the heat inside a cabinet.
When a cold room is a fault
A spare room you turned down on purpose can be cool. A living room you set to 18°C that stays cold is a different problem, and more dial-turning will not sort it.
- The radiator is cold at the top and warm at the bottom, with the valve open and the thermostat calling for heat. That is the bleed page. Have a cloth ready, and check the boiler pressure afterwards if the handbook tells you to.
- Every radiator is lukewarm, or the gauge has fallen and will not hold. That is the low-pressure page. Stop if the needle will not stay up.
- The boiler will not fire at all after you have checked the programmer is in an on period. That is the will-not-fire page. A TRV in a spare room cannot lock the boiler out by itself. If the boiler has locked out, stop the room-by-room plan.
- You smell gas, or the carbon monoxide alarm sounds when you are not holding the test button. Leave, and use the gas line above or call 999 for the alarm. The test itself is on the alarm page.
- Water is coming through a ceiling after Thursday’s rain. That is the roof-leak page, not a heating setting.
If you are about to replace radiators because one room never reaches a comfortable temperature even with the valve fully open, the heating-power calculator runs in the browser and gives a range. It does not upload the measurements, and it is not a quote for new radiators. Take the range to the person you phone.
Blankets, a plug-in heater, or a stove
The poll’s split, among people planning no central heating at all, was that half would use extra layers, hot-water bottles or heated blankets, and 19% would use a portable heater, an open fire or a log burner. Layers and a blanket do not load the boiler or the consumer unit. A plug-in heater does. The cost of running one, against heating a room from the boiler under the October unit rates, is already on the plug-in heater page, including the point at which a hot socket means you stop. Do not treat that page as permission to heat the whole house from the wall sockets.
An open fire or a wood burner is the wood-burner page: sweep, dry fuel, and a flue you can show has been looked at, before the colder nights from Friday. Lighting one because the radiators are off does not skip those checks. A gas fire is gas work, on the plumbing list, and the Gas Safe notes explain that register.
Heating oil is outside the gas and electricity price cap. If the house is on oil, the tank check before you order is on the heating-oil page. The room valves on an oil boiler are still the valves in this list. Energy Saving Trust’s control advice covers oil and LPG boilers as well as gas, and it says the way you use the controls differs for a heat pump or for electric heating. A heat pump that is already in is not this Friday’s TRV experiment. The heat-pump page is the survey check, for a different decision.
When the next step is a phone call
Call when the setting you can reach is not the problem. A TRV that spins without shutting the radiator, a valve that weeps when you turn it, or a room that stays cold with the head removed and the pin free, wants a heating engineer. So does a house with no room thermostat and no TRVs, if you want those controls fitted before the colder weeks rather than improvised with the boiler dial.
Energy Saving Trust’s heating-controls page puts a programmer, a thermostat and TRVs on all radiators at around £600 to install, and TRVs alone at around £370 where a programmer and a thermostat are already there. It puts the saving from installing and using the controls at about £100 a year in Great Britain and £110 in Northern Ireland. Those are their around-figures. They are not a price this site can honour, and they are not a bill reduction you can bank before anyone has seen the pipework. The same page says to get quotes from at least three installers, and to use people certified with a scheme such as TrustMark and registered with Gas Safe for gas boilers or OFTEC for oil. You ask those questions on the phone. A listing that shows Gas Safe is showing a public register entry. It is not a guarantee from this directory.
Open plumbing and heating and use the number on the card. The same lists exist with a city attached, for example plumbing in Glasgow or plumbing in London. Tell them which rooms you want at 18°C, which rooms you have already turned down, and whether the boiler is gas or oil. The contact-details page only shows how that call works. Nobody here forwards the enquiry, and nobody here decides a grant.
Questions that decide the next step
Can I turn a spare-room radiator fully off until spring?
Energy Saving Trust says it is usually best not to leave rooms completely unheated for long periods in colder weather. Some background heat reduces the chance of condensation and mould, and the room is easier to warm when you need it. The Met Office outlook for Sunday 18 to Tuesday 27 October includes frosty mornings in the usual prone spots. Turn the valve down, and leave it able to put a little heat into the room. For rooms you regularly use, the NHS page says at least 18°C if you can.
Should I turn the thermostat up because Friday is colder outside?
Energy Saving Trust says you do not need to turn the thermostat up when it is colder outside. The heating still aims for the temperature you already set. It may take longer, so bring the on-time earlier rather than raising the set point. Turning a thermostat from 22°C to 21°C is the one-degree example Energy Saving Trust prices at about £120 a year in Great Britain and £80 in Northern Ireland. That is their estimate, not a cut this site can apply to a bill.
When is a cold room a plumber’s job?
A room you chose to turn down is a radiator-valve setting. A room you set to warm that stays cold at the top of the radiator is the bleed check. A boiler that will not fire, a gauge that will not hold, or a smell of gas is a stop. Gas work belongs with a Gas Safe engineer. Open the plumbing list and use the number on the card. This site does not pass the job on.
Need a number for the heating?
Open the plumbing list, pick the city, and contact the business yourself if a valve, a thermostat or the boiler is beyond the settings on this page. You place the call.