Smart heating controls get sold on the promise of savings. Some of that is real, some of it depends entirely on how you were heating your home before, and some of it is marketing.
We fit Hive across Edinburgh most weeks when installing central heating, so here’s an honest look at what Hive+ actually does, which hardware you need, what it costs, and when it’s worth it.
First, a naming note: the subscription used to be called Hive Heating Plus. It’s now Hive+, at £3.99 a month or £39.90 a year. If you’re reading older guides about smart thermostats, that’s the same thing.
What is Hive+, and do I need it?
Recommended for: households who’ll actually look at the data and act on it. If you want a timer you can change from your phone, you don’t need it.
The important thing to understand: your Hive thermostat works perfectly well without a subscription. Scheduling, manual control, remote access from the app, hot water control — all of that is included with the hardware.
Hive+ is the paid layer on top. It adds:
- Energy spend tracking, with custom limits and alerts when you’re heading over budget
- 24/7 efficiency monitoring that flags when something looks wrong with the system
- Detailed heating history and usage patterns
- Extended warranty cover on your Hive devices
- Member offers and discounts
That’s genuinely useful if you’re the sort of person who’ll open the app, look at the graph and change something. If nobody in the house is going to do that, you’re paying £47.88 a year for charts.
How much will a smart thermostat actually save me?
Hive’s own headline figure is up to £167 a year, based on Ofgem’s medium annual gas consumption of 9,500 kWh at a July 2026 average unit price of 7.33p per kWh including VAT. The underlying claim is up to 12% off your gas bill from using a class V directly modulating room thermostat compared with a standard room thermostat.
Read that carefully, because it’s the key to the whole thing.
The saving is measured against a standard room thermostat — the old-fashioned kind that just switches the boiler on and off. If that’s what you’ve got, the upgrade is real. If you already have decent time and temperature controls and you’re disciplined about using them, the gap is much smaller.
Hive also publishes a different figure elsewhere on its own site based on different consumption and unit price assumptions. That’s not dishonest — energy prices move — but it tells you these numbers are illustrative rather than a quote. Your actual saving depends on your house, your habits and what you’re replacing.
The honest version: smart controls save money mainly by stopping you heating an empty house. The technology helps. The behaviour change does most of the work.
Which Hive products do I actually need?
There are more variants than most people expect, and picking the wrong one closes off options later. Here’s the range that covers almost every Edinburgh home.
Hive Thermostat (full size)
Hive’s best-known product and the one most people picture. The precision dial is genuinely nicer to use than a touchscreen for anyone who isn’t app-first — which in a shared house usually means it gets used properly rather than being ignored.
Available in versions for combi boilers and for systems with a hot water cylinder, and in hub and hubless variants.
Hive Thermostat Mini
A compact touchscreen unit at a lower price than the full-size dial, with the same core functionality. If you want a single-zone smart upgrade and nothing more, this is the sensible buy.
Hive Hub
This is the decision people get wrong.
Hubless models connect straight to your Wi-Fi, which is simpler and means nothing plugged into your router. But the hub is what bridges Zigbee, and Zigbee is the only way to add Hive radiator valves or smart plugs. Go hubless and you’ve closed off room-by-room control unless you replace the thermostat later.
Expect roughly £105 for a thermostat alone, or around £170 for a unit with the hub included. If there’s any chance you’ll want valves in future, the hub version is the cheaper decision in the long run.
Hive Radiator Valves
Recommended for: homes with rooms that genuinely go unused — a spare bedroom, a home office nobody’s in during the day.
These replace the manual TRV head on individual radiators and give you per-room scheduling and open-window detection, so a spare room isn’t heated to living-room temperature all winter.
Budget roughly £275 to £325 for a five-valve setup, on top of the thermostat. That’s a real investment, so target the rooms where the waste is, rather than doing the whole house. Hallways are usually best left on manual valves.
What’s the catch nobody mentions?
This is the part you won’t find in a product listing, and it’s the single most important thing to get right at the point of purchase.
OpenTherm and smart radiator valves are mutually exclusive on Hive.
OpenTherm lets a compatible thermostat tell your boiler exactly how hot to run the flow, rather than just switching it on and off — that’s the modulating behaviour behind the “up to 12%” saving. It’s the more sophisticated way to run a combi, and it’s where most of the efficiency gain lives.
But OpenTherm can’t run at the same time as multi-zone setups or Hive radiator valves. You have to pick: modulation, or room-by-room control in relay mode. You can’t have both.
That matters enormously in an Edinburgh flat versus a four-bedroom house, and the right answer differs:
- Flat or small terrace, one heating zone, everyone home at similar times? Take OpenTherm. Modulation will do more for you than zoning would.
- Larger house with rooms genuinely sitting empty for most of the day? Take the valves. Not heating three unused rooms beats running the boiler slightly more cleverly.
Check your boiler on Hive’s compatibility checker before assuming OpenTherm is on the table — not every boiler supports it.
Will Hive work with my existing boiler and system?
Hive is compatible with most common systems, including gas, LPG and electric boilers, and with both combi and cylinder setups. Older boilers, unusual wiring and awkwardly sited units are where compatibility questions come up — and where a straightforward one-to-two hour install turns into something longer.
We’ll check compatibility properly against your actual system before recommending anything. That includes whether OpenTherm is available to you, which decides the hardware choice above.
Should I install it myself?
Hive is one of the more DIY-friendly smart thermostats, and plenty of people do fit their own. But the receiver wires into your boiler, and getting it wrong ranges from “doesn’t work” to “needs an engineer to undo”.
There’s also a practical point: a professional install gets the system configured properly rather than just powered up. Correct OpenTherm setup, sensible default schedules, hot water configured against your cylinder, and everything tested before we leave.
If you’re having a boiler replaced or serviced anyway, adding the controls to the same visit is the cheapest way to do it. The engineer is already there and already has the boiler open.
What does Hive integrate with?
Hive works with Alexa and Google Assistant for voice control, so you can set temperatures, boost the heating and control hot water without touching the app. It also connects to other Hive devices — smart plugs, sensors, lighting — through the hub.
Worth knowing that Hive has discontinued some of its wider product line, including the View cameras and leak detection. The heating range remains supported and actively developed, but if you were planning a whole-house Hive ecosystem, check what’s still current before you commit.
Is Hive+ right for your home?
It tends to be worth it if:
- You’re upgrading from a basic on/off room thermostat or a mechanical timer
- Your household schedule varies, so a fixed timer never quite fits
- You have rooms that go unused for large parts of the day
- You want visibility of what your heating is actually costing you
- Somebody in the house will genuinely engage with the app
It’s less compelling if you already have modulating controls you use well, or if you know the app will be opened twice and then forgotten.
We’d rather tell you that up front than sell you a subscription you won’t use.
Getting set up with The Edinburgh Boiler Company
We can help you:
- Check compatibility with your existing boiler and system, including OpenTherm
- Choose between hub and hubless, and between modulation and zoning, for your property
- Install and configure everything properly
- Set up sensible schedules and show you how to change them
- Advise honestly on whether the subscription is worth it in your case
Call us on 0131 510 8500 to talk it through or book a visit. If your boiler is also due a service, or it’s over eight years old and you’re weighing up a replacement, we can cover that in the same conversation.
Our aim isn’t to sell you the most kit. It’s to fit controls that actually get used, on a system that’s working properly underneath them — because a smart thermostat on a neglected boiler is a smart thermostat on a neglected boiler.
