Why Winter Thermostat Settings Matter More This Year
Heating is the largest single energy cost in most homes, and this winter it arrives with an uncomfortable backdrop. In the United States, homeowners are expected to pay on average 8.7 percent more to heat their homes than last winter, according to the National Energy Assistance Directors Association figures quoted in November 2026 coverage. In the United Kingdom, the energy price cap is forecast to rise again in January, with one widely quoted forecast putting a typical annual bill close to £2,000. You cannot control the price of gas, oil or electricity, but you can control how much of it your home actually uses, and for how long each day.
That is why November is thermostat month. Bob Vila's November 2026 home-projects guide puts installing a programmable thermostat first on its list, ahead of the usual winter jobs, and for good reason. November is the last comfortable window to learn your system, test your settings and fix cold rooms before the coldest weeks arrive. A thermostat set once in October and then ignored until spring is almost certainly heating empty rooms, overheating bedrooms at night, and running at full temperature while everyone is out at work or school.
The good news is that the savings do not require discomfort, a new boiler or a cold house. They come from timing: heating the rooms you use, when you use them, to the temperature you actually need, and letting the house cool a little when nobody needs the warmth. This guide shows you how to build that schedule step by step, room by room, whether you have a simple programmable thermostat, a smart thermostat, or an older dial model you are planning to replace.
How a Programmable Thermostat Actually Saves Money
A programmable thermostat saves money in a very simple way: it turns the heating down automatically when you do not need it, and brings it back up before you do. The most valuable version of this is called a setback. A setback is a planned period, usually at night or while the house is empty, when the thermostat is set several degrees lower than the daytime temperature.
The United States Department of Energy estimates that turning a thermostat back by 7 to 10 degrees Fahrenheit for eight hours a day can save around 10 percent a year on heating costs. That figure is often quoted because it is easy to test: eight hours covers a night's sleep, or a working day out of the house, and the saving comes from the hours the boiler is not working hard, not from any clever trick.
Many people resist setbacks because of a stubborn myth: that it costs more to reheat a cold house than to keep it warm all day. In practice, a house loses heat faster when the gap between inside and outside temperatures is larger. Keeping a house at 21 degrees all night while it is freezing outside means heat is leaking out all night. Letting it drop to 16 or 17 degrees slows that leak, so the boiler has less total work to do over 24 hours, even though it works a little harder for a short burst in the morning. Think of it like a bath: keeping it topped up with hot water all day uses more hot water than letting it cool and refilling it when you need it.
There is one important exception. Homes with very slow heating systems, such as some heat pumps and underfloor heating, do not respond well to deep, short setbacks, because they take a long time to recover. If your system takes two hours or more to raise the temperature by a few degrees, use a gentler setback of 2 to 3 degrees instead of a deep one, and start the morning warm-up earlier. The principle is the same, but the timing must match your system. The rest of this guide assumes a conventional boiler and radiators, with notes where heat pumps differ.
The Winter Baseline: What Temperatures Should You Aim For?
Before you build a schedule, decide on your target temperatures. These are starting points, not rules carved in stone. Older people, young children, and anyone with a health condition that makes them sensitive to cold should stay warmer, and health guidance in the UK commonly suggests heating the rooms you use most to at least 18 degrees Celsius when you can. If anyone in your home feels cold at these levels, raise them. Saving money should never mean shivering.
For a typical household, these baselines work well as a first draft:
Living areas during the day
Aim for 19 to 21 degrees Celsius, or 66 to 70 degrees Fahrenheit, in rooms where you sit still in the evening. If you are active, cooking or moving around, the lower end feels fine. If you sit reading or watching television for hours, you will probably want the higher end.
Bedrooms at night
Aim for 16 to 18 degrees Celsius, or 61 to 64 degrees Fahrenheit, overnight. Most people sleep better in a cooler room with a proper duvet than in an overheated bedroom. A bedroom that is too warm also dries the air and disturbs sleep.
Bathrooms in the morning and evening
Aim for 21 to 22 degrees Celsius, or 70 to 72 degrees Fahrenheit, for the short periods when the bathroom is in use. There is no need to keep a bathroom at full temperature all day. A heated towel rail on a timer can take the edge off without heating the whole room.
Kitchen
Aim for 18 to 19 degrees Celsius, or 64 to 66 degrees Fahrenheit. Cooking adds a surprising amount of heat, so kitchens often need less heating than you expect, especially in the evening.
Empty house and holidays
Aim for 12 to 15 degrees Celsius, or 54 to 59 degrees Fahrenheit, as a frost-protection minimum. This keeps pipes safe without heating an empty house. Never switch the heating fully off in freezing weather if pipes could freeze, even if you are away for a few days.
Rooms nobody uses
Close the radiator valve most of the way, but do not shut a room off completely in winter. A spare room kept at around 15 degrees stays dry, avoids damp on cold walls, and does not drag heat from the rooms next to it.
A Simple Winter Schedule That Works for Most Homes
You do not need six different programmes to start. Most households can get most of the saving from four periods a day. Set these on your thermostat first, live with them for a week, and only then fine-tune.
Morning warm-up: 6:00 to 8:30
Set the heating to come on 30 to 60 minutes before you get up, so bedrooms and bathrooms are comfortable but not hot. If your house takes a long time to warm up, start earlier rather than setting a higher temperature. A higher setting does not heat the house faster; it only makes the boiler overshoot later. Aim for living areas at 19 to 20 degrees and bathrooms a degree warmer.
Daytime setback: 8:30 to 16:30
If the house is empty during the day, drop the setting to 15 to 17 degrees. This is the single biggest saving in the schedule, because it covers the longest empty stretch. If someone works from home, do not use a whole-house setback. Instead, heat the room they work in and let the rest of the house sit lower, using radiator valves to direct the heat.
Evening comfort: 16:30 to 22:30
Bring the house back to full comfort temperature for the evening. This is the period most people judge their heating by, so get it right. Living rooms at 20 to 21 degrees, bedrooms warming gently towards bedtime but not yet at full temperature, and the kitchen a little lower because cooking helps.
Night setback: 22:30 to 6:00
Drop back to 16 to 17 degrees overnight. Bedrooms cool slightly, the boiler rests, and you wake to a house that is cool but not cold. If you wake in the night feeling cold, add a degree rather than abandoning the setback altogether. A one-degree change is worth trying before you give up on the whole idea.
Weekends are different, so programme them differently
Most programmable thermostats let you set a separate weekend schedule. Use it. A Saturday at home needs daytime heating that a Tuesday at work does not, and a Sunday lie-in needs a later morning warm-up. Copying the weekday schedule onto the weekend either wastes heat on weekdays or leaves you cold at weekends. Spend five minutes setting the weekend separately and you will feel the difference immediately.
Room-by-Room Settings in Practice
A single thermostat in the hallway controls the whole house in many homes, which means room-by-room control depends on radiator valves. If you have thermostatic radiator valves, you can use them to shape the schedule room by room without touching the main thermostat. Here is how to think about each space.
Living room
This is your comfort room, so give it priority in the evening. Keep its radiator valve fully open during evening hours and set the main thermostat to your living-room comfort temperature. Close curtains at dusk, because a curtained window loses far less heat than a bare one, and keep furniture away from radiators so warm air can circulate.
Bedrooms
Bedrooms need warmth at bedtime, not all evening. Set radiator valves to medium in the early evening so the room is pleasant when you go to bed, then let the night setback do its work. A warm bedroom all night is one of the most common wastes in winter heating. If a bedroom is used as a home office during the day, treat it as a daytime room instead and set its valve higher during working hours.
Bathroom
Bathrooms feel cold because of tiles, bare feet and wet skin, not because they need all-day heating. A short burst of heat before morning showers and evening baths is far more efficient than a warm bathroom at noon. If your towel rail is heated by the central heating, a timer or a separate valve setting can keep towels dry without heating the room constantly.
Kitchen
Kitchens generate heat from cooking, dishwashers and even a kettle used often. Many kitchens are also the warmest room in the house by 7 pm without any help. Set the kitchen valve a notch lower than the living room and see how it feels for a week. You may find you can leave it lower all winter.
Hallway and stairs
The hallway is where most thermostats live, so it matters more than it looks. If the hallway is draughty or has an external door opening often, the thermostat will call for heat even when the living room is warm. Keep the hallway radiator valve open enough that the thermostat reads a fair sample of the house, and deal with draughts at the front door rather than turning the whole system up.
Spare rooms and storage rooms
Keep spare rooms at a background temperature of around 15 degrees. Shutting the valve fully can lead to cold walls, condensation and mould, especially in a room with an outside wall. A low, steady temperature is cheaper in the long run than drying out a damp room in spring.
Radiators, Valves and Zones: Getting Heat Where You Need It
A good schedule fails if the heat does not go where the schedule intends. Three simple checks make a large difference.
First, bleed your radiators at the start of winter. A radiator that is hot at the bottom and cold at the top has trapped air, and it will not heat its room properly no matter what the thermostat says. Bleeding takes a radiator key and five minutes per radiator, and it is worth doing before you blame the thermostat.
Second, balance your radiator valves. If the radiators nearest the boiler are roaring hot while the far bedroom is lukewarm, the system is unbalanced. Open the far radiators fully and close the near ones slightly, then wait a day and check again. You are aiming for radiators that warm up at roughly the same rate, not for every valve to be fully open.
Third, understand zones if you have them. Some larger homes have two thermostats or a zoned system, often upstairs and downstairs. Programme each zone for its own use pattern: downstairs for daytime and evening living, upstairs for mornings and bedtime. Heating both zones to full temperature all day is the zoned equivalent of heating empty rooms.
If you have a smart thermostat, use its room sensors or radiator controls only if you will actually maintain them. A smart system left on its default schedule is no better than a basic programmable thermostat set properly. The intelligence is in the schedule you choose, not in the device itself.
Comparison: Three Winter Schedules Side by Side
Different households need different schedules, but the structure is the same. Compare these three patterns and pick the one closest to your life, then adjust the times by half an hour at a time.
Out all day household
Morning warm-up 6:00 to 8:30 at 20 degrees. Daytime setback 8:30 to 16:30 at 16 degrees. Evening comfort 16:30 to 22:30 at 21 degrees. Night setback 22:30 to 6:00 at 16 degrees. This is the highest-saving pattern, because the house is empty for eight hours.
Work-from-home household
Morning warm-up 6:00 to 8:30 at 20 degrees. Daytime background 8:30 to 17:00 at 18 degrees for the whole house, with the work room at 20 to 21 degrees using its radiator valve. Evening comfort 17:00 to 22:30 at 21 degrees. Night setback 22:30 to 6:00 at 16 degrees. The saving here comes from keeping the background lower and heating one room properly, rather than the whole house.
Home all day household
Morning warm-up 6:00 to 9:00 at 20 degrees. Daytime comfort 9:00 to 17:00 at 19 to 20 degrees in rooms in use, with unused rooms at 15 to 16 degrees. Evening comfort 17:00 to 22:30 at 21 degrees. Night setback 22:30 to 6:00 at 16 degrees. Even in this pattern, the night setback and the unused-room settings save real money, because the boiler is not heating every room to evening temperature for 24 hours.
Common Thermostat Mistakes That Waste Money
Turning the thermostat up to heat the house faster
A thermostat is not a tap. Setting it to 28 degrees does not make radiators hotter or the house warm up faster; it only makes the system overshoot and stay on longer. Set the temperature you actually want and let the system reach it.
Leaving the heating on all day at a low temperature
This feels thrifty but often costs more than a proper schedule, because the house loses heat all day. A timed schedule with a genuine setback beats a constant low temperature in most conventional systems. The exception, again, is very slow systems such as some heat pumps, where a gentle, steady temperature works better.
Putting the thermostat in the wrong place
A thermostat next to a radiator, in direct sunlight, in a draughty hallway or above a television will read the wrong temperature and heat the house wrongly all winter. If your thermostat is badly placed, a wireless thermostat or a room sensor in the living room can fix the problem without moving pipes.
Forgetting the hot water timer
Heating controls often include a separate hot water schedule. Heating a full tank of water all day when you only shower in the morning and evening is a hidden waste. Set hot water for an hour before morning showers and an hour before evening use, and check whether your tank stays hot enough between those periods.
Ignoring the programme after the first week
The first schedule is a draft, not a final answer. Live with it for a week, note which rooms feel cold and at what times, and adjust one setting at a time. Changing five settings at once makes it impossible to tell which change helped.
If You Do Not Have a Programmable Thermostat Yet
If you still have a simple dial thermostat, you can still save money by turning it down manually at night and when you leave the house, but you will forget, and the saving will be smaller. A programmable replacement is one of the cheapest heating upgrades available, and November is a sensible time to fit one, before the coldest weather and before heating engineers get fully booked.
When choosing a replacement, focus on three things and ignore the rest. First, make sure it works with your system type, whether that is a combi boiler, a system boiler with a hot water tank, or a heat pump. Second, choose a model you will actually programme. A simple seven-day programmer with a clear display beats a complicated smart model whose app you never open. Third, check whether it supports separate weekday and weekend schedules and at least four periods a day. Those two features cover almost every household pattern in this guide.
Fitting is usually straightforward for a like-for-like replacement, but if wiring is involved, use a qualified heating engineer. A badly wired thermostat can damage a boiler control board, and that repair costs far more than the fitting fee. Once fitted, programme it using the schedule in this guide as your starting point, and keep the manual somewhere you can find it in January.
A One-Week Plan to Test Your New Schedule
Day one: set the four-period schedule from this guide, with your rooms at the baseline temperatures. Bleed any cold radiators and check that all radiator valves move freely.
Day two and three: live normally and note cold spots. Is the bathroom cold at shower time? Is the living room slow to warm in the evening? Note the time and the room, not just a general feeling of cold.
Day four: make one adjustment only. Move the morning start 30 minutes earlier, or raise one room by one degree, or open one radiator valve a notch. Do not change everything at once.
Day five and six: test the weekend schedule separately. A weekend at home should feel comfortable during the day without the weekday setback leaving you cold.
Day seven: review your notes. If every room felt comfortable and no period felt wasteful, keep the schedule for a month. If one room was consistently cold, fix that room first, by balancing radiators or adjusting its valve, before raising the whole-house temperature.
Frequently Asked Questions
Should I leave the heating on low all winter instead of using a timer?
For most conventional boiler systems, no. A timed schedule with a night and daytime setback usually uses less fuel than keeping the house warm all day, because heat loss is lower when the house is cooler. Very slow systems such as some heat pumps and underfloor heating are the exception, and they benefit from a gentler, steadier temperature.
What is the cheapest comfortable temperature for a living room in winter?
Most people find 19 to 21 degrees comfortable for sitting still in the evening. Start at 20 degrees, and if you feel cold, check for draughts, cold windows and thin curtains before raising the thermostat. A draughty room at 22 degrees can feel colder than a sealed room at 20 degrees.
How much can a setback really save?
The Department of Energy figure of around 10 percent a year comes from turning the temperature back by 7 to 10 degrees Fahrenheit for eight hours a day. Your saving depends on your climate, your insulation and how long the house is empty, but even a smaller setback of 3 to 4 degrees for eight hours produces a noticeable saving over a winter.
Will turning the heating down at night damage pipes?
Not if you keep a frost-protection minimum of 12 to 15 degrees. Pipes freeze when a house is left unheated in freezing weather, not when it drops to 16 degrees overnight. If you go away in winter, leave the heating on a low frost setting and ask someone to check the house.
Why is one room always colder than the rest?
Usually it is a radiator problem, not a thermostat problem. Check for trapped air, a stuck valve, furniture blocking the radiator, or a long pipe run from the boiler. Balancing the radiators often fixes a cold far room without raising the temperature everywhere else.
Do smart thermostats save more than basic programmable ones?
They can, but only if you use their extra features, such as room sensors, learning schedules and remote control when plans change. A basic programmable thermostat set to a good schedule will beat a smart thermostat left on its default settings. Buy the features you will use, not the features that sound impressive.
The Bottom Line
Winter comfort does not come from a high thermostat setting. It comes from heat in the right rooms, at the right times, with cold rooms and empty hours allowed to cool. Start with the four-period schedule, set room temperatures from the baselines in this guide, use radiator valves to shape heat room by room, and give the schedule a full week before you judge it. With heating costs rising into January, that one week of testing is the cheapest winter upgrade most homes can make, and it costs nothing but a little attention.
