A Thermostat Schedule That Suits Your House
How to build a thermostat schedule from your household's real week: wake, away, home and sleep settings, weekday and weekend patterns, and how to test a change fairly.
The short answer
A good thermostat schedule is a portrait of your week, not a copy of anyone else's. Map when the house is awake and occupied, empty, and asleep, then set temperatures for those blocks: comfortable when people are home and active, lower when the house is empty or everyone is in bed under covers. The Department of Energy's Energy Saver guidance explains setback periods and why holding one temperature around the clock wastes the difference. Programme the pattern once, test it for two weeks, and adjust the times before you adjust the temperatures, because most complaints about schedules are really about warm-up timing. This guide is the practical partner to heating costs within the energy cluster.
Map the week before touching the dial
Take a normal week, not a holiday week, and divide each day into blocks. For many households a weekday has four: morning getting-up, daytime away, evening home, and night asleep. Weekends often have three, with a later start and a fuller house. Note the exceptions honestly, such as a home worker on Tuesdays, a grandparent at home daily, or teenagers whose evenings run later than everyone else's. Those exceptions are exactly what generic schedules miss, and they are why copied settings feel wrong within days. Your map also reveals the empty hours plainly, and empty hours at a lower setting are, for most houses, the single largest and easiest heating saving available anywhere in this cluster.
Choosing the block temperatures
Set the occupied blocks at the temperature the household genuinely finds comfortable in winter clothing indoors, found by small experiments rather than by habit inherited from a previous house. Set the away and asleep blocks lower, by an amount your system's guidance and your home's construction allow; homes with certain heating systems, heat pumps in particular, are often advised by their makers and installers to use gentler setbacks because reheating can draw on less efficient backup heat, so follow the guidance for your specific system. Bedrooms occupied at night need their own thought where zoning or radiator valves exist. Write the chosen numbers on paper and keep them by the thermostat during the test fortnight, so tweaks are recorded rather than lost in the control's menus.
Testing fairly for two weeks
Any schedule change needs a fair test, and fair means long enough to include ordinary weekdays, a weekend and a change in the weather. During the test, resist daily fiddling; note instead the moments the house felt wrong, with the time, because a pattern of cold mornings points to an earlier start time, not a higher temperature all day. Compare meter readings or bills with the period before while remembering that a colder fortnight legitimately uses more heat. If the house feels right and use per cold day falls, the schedule works. If one block fails the family every day, redesign that block. The schedule serves the life, and a schedule abandoned by half term saves nothing at all.
The same schedule, in summer
Cooling follows the mirror image: set the occupied blocks at the warmest temperature the household finds comfortable with light clothing and moving air, and let the temperature rise when the house is empty or, where the household prefers, overnight with fans doing the gentler work. The summer cooling guide covers fans, shading and timing in depth. Programming both seasons' patterns when each season starts, rather than in the middle of the first heatwave or cold snap, keeps the decisions calm. Many thermostats hold separate heating and cooling schedules, and a few minutes at the season change is one of the highest-value habits in this entire cluster, repeated twice a year for a few minutes each time.
Set it, test it, then forget it
That is the promise of a schedule that suits your house: programme it once from a truthful map of the week, test it fairly, adjust the timing where life complains, and then let it run the house quietly for the whole season. Start with the paper map tonight, while the week's pattern is fresh in everyone's mind, and put the programme in tomorrow. When the next season turns, you will already know the method, and the house will settle into its new rhythm within days.
Sources and further reading
- US Department of Energy, Energy Saver guide - where home energy goes, appliance by appliance, and the order in which to tackle it.
- US Department of Energy, Energy Saver - heating, cooling, water heating and weatherization guidance for households.
- ENERGY STAR, energystar.gov - appliance energy ratings, the Home Energy Yardstick and product guidance.
Evidence basis: Official-guidance guide. The mechanics described follow the public guidance listed below, checked on 24 October 2026; provider terms and official guidance change, so re-check the source before acting. Applies when: Homes with a programmable or smart thermostat, or manual controls used on a routine