Are Smart Thermostats Actually Worth It?
Hive, Nest, Tado and Honeywell compared — typical fuel savings, install cost, and which one to pick for an open-plan house vs a traditional terraced.
Smart thermostats are the single most over-hyped product in heating. Manufacturers love to claim '30% energy savings' — the reality, based on Energy Saving Trust field studies and what we see at customer follow-ups, is more like 5–12% for most households. That said, they can be genuinely worth the money — especially if you currently have no thermostat at all, or just a basic mechanical timer.
Hive Active Heating — best for simplicity
British Gas's Hive is the easiest to use and the most reliable on a flaky home Wi-Fi. The app is uncluttered, geolocation works well, and the receiver wires straight into any combi boiler in under an hour. Around £179 self-install or £249 fitted by us. No subscription. Best for: anyone who just wants a thermostat they can control from the pub.
Google Nest (3rd & 4th gen) — best for learning behaviour
Nest genuinely learns when you're home and adjusts its schedule over a few weeks. The hardware is the most attractive on the market. Downside: it's more sensitive to network issues and the 'Eco temperature' feature can confuse less tech-savvy users. Around £219 self-install or £289 fitted. Best for: tech-confident households with a regular weekly routine.
Tado — best for multi-room control
Tado's killer feature is per-radiator smart TRVs — control the spare bedroom independently from the lounge. If you have an open-plan downstairs and rarely-used upstairs rooms, the savings here are real (often 10–15%). The Tado X range now uses Thread/Matter for faster response. From £199 for the head unit, plus £75 per smart TRV. Best for: 4+ bed homes with varied room usage.
Honeywell Evohome — best for premium control
Evohome is the most powerful system we fit, with up to 12 zones controlled independently. It's brilliant for large or unusually shaped homes. Cost adds up fast — a full 8-zone setup with TRVs is £900+. Best for: large rural properties, listed buildings with cold spots, or anyone who genuinely wants total control.
Will it pay for itself?
A typical Lancashire 3-bed semi spends roughly £1,400 per year on gas in 2026. A 10% saving is £140 — so a £249 Hive pays back in about 21 months, and a £900 Evohome pays back in 6+ years. The ROI is best when (a) you currently have no programmable stat at all, (b) your house is poorly zoned, or (c) your routine is irregular. If you're already disciplined with a 7-day programmer, the savings will be modest.
What we'd fit in our own homes
3-bed semi, predictable routine: Hive. 4-bed family home with rarely-used rooms: Tado with smart TRVs in the kids' bedrooms and spare. Large detached or barn conversion: Evohome. Rental property: a basic Drayton wired programmable stat — tenants don't always look after smart kit and the apps need a Wi-Fi password the landlord doesn't have.
We supply and fit all of these alongside any new boiler install — and we'll be honest if we think one isn't worth the money for your specific setup. Call us or build a quote online and we'll include the right thermostat in the price.