Across Europe, heating is the largest single energy cost in most households. Gas and electricity prices climbed sharply from 2021 onwards, and in many countries they remain far above the levels of a decade ago. Government support schemes have been scaled back, so more households now pay something closer to the real market price for every kilowatt-hour and every cubic metre of gas they use. That is why so many homeowners are looking for ways to consume less instead of only switching supplier — and a Tuya WiFi thermostat is one of the cheapest, fastest places to start.
Why heating is where the savings are
In most European countries, space heating and hot water account for well over half of household energy use. Lighting and appliances are smaller by comparison, and many of them are already efficient. If you want to reduce an energy bill meaningfully, the heating system is where the money is — and unlike insulation or new windows, a thermostat upgrade pays for itself within a single heating season.
What a Tuya thermostat changes compared with a mechanical thermostat
A traditional dial or basic programmable thermostat does one thing: it switches the boiler or heating circuit on and off around a rough temperature. A Tuya smart thermostat adds several things that directly affect how much energy your home consumes:
- Accurate measurement. A digital sensor reads the room temperature precisely, so the heating stops closer to the temperature you actually set instead of overshooting.
- Proper weekly schedules. Different temperatures for mornings, working hours, evenings, nights, weekdays, and weekends — set once, used all winter.
- Remote control. Adjust the heating from the Tuya Smart app when plans change instead of leaving the house warm and empty.
- Away and holiday modes. Drop the setpoint to a frost-protection level while you are away, then bring the house back to comfort before you return.
- Automation with other Tuya devices. Window and door sensors can pause the heating automatically, and motion sensors can tell the difference between an occupied and an empty room.
Five ways a Tuya thermostat lowers your bill
1. Stop heating an empty home
This is the biggest saving for households where everyone is out during the day. Instead of heating the house to full comfort temperature from morning to night, the schedule drops to an eco setpoint while the house is empty and returns to comfort shortly before you come home.
2. Turn the heating down at night
Most people sleep better in a cooler room, and the saving is real. A widely used rule of thumb in the heating industry is that reducing the indoor temperature by around 1°C cuts heating energy consumption by roughly 6–10%. A nightly drop of 2–3°C, held for eight hours, adds up over an entire winter.
3. Heat only the rooms you actually use
If your home has radiators with thermostatic valves, pairing a Tuya thermostat with a Tuya radiator valve or a zone valve lets you keep bedrooms and spare rooms cooler while the living areas stay comfortable. Zonal control is often where the largest savings appear in larger homes and apartments with unused rooms.
4. Prevent overheating
Mechanical thermostats commonly overshoot by one or two degrees, and every extra degree costs energy. A smart thermostat with a precise sensor and adjustable hysteresis stops the boiler as soon as the target is reached.
5. Remove the guesswork
Most wasted heating comes from habit: switching the heating on early “just in case”, leaving it running because nobody wants a cold house, or forgetting to turn it down before a trip. Schedules and app control replace guesswork with a repeatable pattern.
What the savings look like in practice
The exact figure depends on your tariff, your building, and how you heat today. As an illustration: a household using 1,500 m³ of natural gas per year at €1.10 per m³ spends around €1,650 on heating. Cutting consumption by 10–15% — a realistic result from consistent scheduling and a lower night setpoint — saves roughly €165–250 in one winter. In homes that are empty during the working day, or that currently run at a constant high temperature, savings are often larger.
Studies of smart thermostat deployments typically report heating savings in the range of 8–20%, with the higher end coming from homes that previously had no schedule at all and from households that use away mode consistently. Treat those numbers as a range to aim for, not a promise: the device enables the saving, your schedule and your habits deliver it.
Choosing the right Tuya thermostat for your heating system
- Gas or oil boiler (combi or conventional): choose a Tuya on/off thermostat with dry-contact terminals (COM, NO, NC) and check the switching voltage your boiler expects.
- Electric underfloor heating: use the Tuya thermostat model with an external floor sensor and a load rating that matches the heating mat or cable.
- Heat pumps: confirm compatibility with the manufacturer or installer, since some systems expect a modulating signal rather than a simple on/off contact.
- District heating or radiator-only systems: a room thermostat may not control the supply, so Tuya smart radiator valves or smart TRVs are the practical route to scheduling and zoning.
- Connection type: WiFi models connect directly to a 2.4GHz network and are simplest for one or two zones. Zigbee models connect through a Tuya gateway and suit whole-home installations with many sensors and valves.
Getting started in an afternoon
- Switch off power to the heating circuit at the breaker before opening any wall plate.
- Mount the thermostat about 1.5 metres above the floor, away from direct sunlight, draughts, radiators, and outside walls.
- Wire according to the terminals on your boiler or heating manifold, and have a qualified electrician handle anything you are unsure about.
- Add the thermostat to the Tuya Smart app on a 2.4GHz network and set your comfort, eco, and away temperatures.
- Build the weekly schedule around your real routine, then add a window sensor automation that pauses heating when a window is open.
Small habits that multiply the savings
Close doors between heated and unheated rooms, keep radiators clear of furniture and curtains, and resist the temptation to nudge the setpoint up by several degrees when you feel cold — a single degree or two is enough. Bleeding radiators and servicing the boiler once a year also keep the system running at the efficiency it was designed for.
For a detailed look at how these thermostats work, read the complete Tuya WiFi thermostat guide. If you want to extend the system with sensors, radiator valves, and window contacts, see the complete guide to smart home sensors and how to build a complete Tuya smart home system. Browse the full Tuya smart home product collection to find the thermostat, gateway, and sensors that match your heating setup.