Short answer: Choose the Heatmiser neoStat V3 (£77) when you can run a 230V cable to each room and want app control, the neoAir (£80) when the rooms are finished and you want app control with no cables, and the Slimline-RF (£57) when you want a wireless thermostat with buttons and no app. For electric floor heating, the Slimline-E (£56) and neoStat-e (£83) switch up to 16A and come with a floor sensor. The thermostat you pick decides the wiring centre you need. Prices inc VAT, October 2026.
Heatmiser's range has a lot of similar names, and it is easy to order a thermostat that doesn't match the wiring centre. This guide compares the three families model by model, shows which wiring centre or receiver each one needs, and prices complete systems for a retrofit, a new build and an electric en-suite.
If you are new to UFH controls, read Underfloor heating thermostats explained first. It covers how thermostats, wiring centres and actuators work together and the room by room rules.
What is the difference between neoStat, neoAir and Slimline?
The difference is power and app control. neoStat models are wired and get their power from the wall. The neoAir runs on batteries and talks to a wireless receiver. Slimline models do the same jobs with buttons only and no app. Anything with "neo" in the name can join the neoApp through a neoHub.
| Model | Power | App |
|---|---|---|
| neoStat V3 | 230V wired | Yes, with neoHub |
| neoStat 12V | 12V DC wired | Yes, with neoHub |
| neoStat WiFi | 230V wired | Yes, no hub |
| neoAir | 4 x AAA | Yes, with neoHub |
| Slimline-RF | 2 x AAA | No |
| neoStat-e | 230V, 16A | Yes, with neoHub |
| Slimline-E | 230V, 16A | No |
All of them have a 5 to 35°C setting range. The neoStat V3, neoStat 12V and neoAir can each be set up as non-programmable, 5/2 day, 7 day or 24 hour. The Slimline-RF offers non-programmable, 5/2 day or 7 day with 4 heating levels a day.
Which one should I choose for my project?
Start with whether you can get a cable to each room, then decide whether the homeowner wants an app. This table covers the usual cases.
| Project | Pick | Why |
|---|---|---|
| New build, walls open | neoStat V3 | Wired, app ready |
| Retrofit, wants app | neoAir | No cables to chase |
| Retrofit, no app | Slimline-RF | Lowest cost wireless |
| Rental or holiday let | Slimline-RF or Edge | Simple, key lock |
| One zone, wants app | neoStat WiFi | No hub to buy |
| No mains in back boxes | neoStat 12V | 12V to each room |
| Electric mat, wants app | neoStat-e | 16A, app ready |
| Electric mat, no app | Slimline-E | 16A, lowest cost |
The Slimline-RF uses 868MHz radio with a range of up to 100m and has a built-in wireless fail-safe. The neoAir is the better pick if anyone in the house will want to change schedules or boost a room from their phone. The two cost £23 apart per room, but the neoAir also needs a £162 neoHub for app control, so the real gap on a five room house is £277.
Which wiring centre goes with each thermostat?
Each thermostat family has its own wiring centre or receiver, and they do not cross over. Get this right before you order.
| Thermostat | Pairs with | Price |
|---|---|---|
| neoStat V3, WiFi, Edge, DS1 | UH4 or UH8 (230V) | £64 / £77 |
| neoStat 12V | UH8-N (12V) | £144 |
| neoAir, Slimline-RF | UH8-RF (wireless) | £134 |
| neoAir, Slimline-RF (1 zone) | RF-Switch | £50 |
| neoStat-e, Slimline-E | Mat or cable direct | None needed |
A few rules from the product data:
- The UH4, UH8, UH8-RF and UH8-N each run up to 6 actuators per zone, within a 5A total board load.
- The UH8-RF is designed for wireless thermostats only. For wired 230V thermostats, use the UH8.
- The neoStat 12V needs a 12V DC supply and will not work on a 230V UH4 or UH8.
- The RF-Switch has two channels, so one receiver can switch heating and hot water from a Slimline-RF or neoAir. With a UH8-RF, it can act as a wireless link to the boiler, so you don't need a cable from the manifold to the boiler.
Do I need a neoHub, and when is the neoStat WiFi cheaper?
You need a neoHub for app control on every neo thermostat except the neoStat WiFi, which joins your router directly. The neoHub G3 (£162) connects up to 32 neo devices, and works with Apple HomeKit, Google Home, Amazon Alexa and IFTTT. The Slimline models never connect to an app, with or without a hub.
Two compatibility points catch people out. The neoStat V3 does not work with the 1st generation neoHub or the neoHub Mini. The neoStat WiFi does not work with any neoHub.
On price alone, here is how separate neoStat WiFi thermostats compare with neoStat V3s plus one hub (thermostats and hub only, inc VAT, October 2026):
| Zones | neoStat WiFi | neoStat V3 + hub |
|---|---|---|
| 1 | £110 | £239 |
| 2 | £220 | £316 |
| 4 | £440 | £470 |
| 5 | £550 | £547 |
| 8 | £880 | £778 |
So the neoStat WiFi is the cheaper route up to four zones, and the hub route wins from five. The hub also brings things the WiFi thermostat doesn't: Smart Profiles, 4 weeks of temperature history, and the option to add a neoStat-HW, neoPlug or neoStat-e to the same app later. If you think the house may grow to more zones, start with the hub.
How do hot water and heating controls fit in?
Each family has a way to time the hot water, so you can keep one look across the house.
- Wired neo: the neoStat-HW (£77) is a hot water programmer with 4 times a day and changeover contacts. It matches the neoStat V3 in size and colour and joins the same neoHub.
- neoAir: in heating and timer mode, one neoAir can run its own heating zone and a timed output such as hot water.
- Slimline-RF: it offers 4 heating levels and 4 hot water times, so one unit can control both through an RF-Switch.
- Wiring centres: the UH4, UH8-RF and UH8-N have a hot water output. The UH8 and UH8-N let zone 8 run a radiator circuit, the UH4 uses zone 4, and the UH8-RF lets you set any zone as a radiator zone in software.
What does each option cost for a whole house?
These worked examples include the thermostats, wiring centre, hub where needed and one £12 actuator per loop. Prices inc VAT, October 2026.
| Setup | Parts | Total |
|---|---|---|
| Retrofit, 5 rooms, 7 loops, app | 5 neoAir, UH8-RF, neoHub, 7 actuators | £780 |
| Retrofit, 5 rooms, 7 loops, no app | 5 Slimline-RF, UH8-RF, 7 actuators | £503 |
| New build, 8 rooms, 10 loops, app | 8 neoStat V3, UH8, neoHub, 10 actuators | £975 |
| New build, 8 rooms, 10 loops, 12V | 8 neoStat 12V, UH8-N, neoHub, 10 actuators | £1074 |
| Electric en-suite, no app | 1 Slimline-E | £56 |
| Electric en-suite, on the house app | 1 neoStat-e (hub already fitted) | £83 |
The arithmetic for the first row: 5 x £80 = £400, plus £134, £162 and 7 x £12 = £84, giving £780. Wiring of all controls should be done by a qualified electrician, and the final connection of electric floor heating must be made by one, with a 30mA RCD, to BS 7671.
What are the most common mistakes when choosing?
Most controls problems start with a thermostat that doesn't match the rest of the kit. Check these before you order:
- 12V thermostat on a 230V wiring centre. The neoStat 12V only works with the UH8-N.
- Expecting the Slimline-RF to have an app. It doesn't. Choose the neoAir if an app may be wanted later.
- Adding a neoStat WiFi to a neoHub system. It can't join the hub. Use a neoStat V3 instead.
- A water UFH thermostat on an electric mat. The neoStat V3, Edge and DS1 switch 3A maximum. Electric mats need the neoStat-e or Slimline-E. See Electric UFH thermostats and 16A loads.
- Wireless range in a large house. A neoPlug (£60) acts as a repeater for the neoHub, UH8-RF and RF-Switch, and each mains-powered neoStat also repeats the neo signal.
- Forgetting the floor probe. The neoStat V3, neoStat WiFi, Edge and Touch support floor sensing but no probe comes in the box. Add one where the floor finish needs a temperature limit.
Can I upgrade from one model to another later?
Yes, within the same wiring centre. A Slimline-RF and a neoAir both pair with the UH8-RF, so you can swap a room from buttons to app control by changing the thermostat and adding a neoHub. A neoStat V3 works as a normal wall thermostat with no hub, so you can fit V3s now and add the neoHub when the homeowner wants the app.
Moving between wired and wireless is a bigger change, because the wiring centre has to change too: a UH8 for wired thermostats, a UH8-RF for wireless. If you are unsure, the neoStat V3 on a UH8 keeps the most options open on a new build, and the neoAir on a UH8-RF does the same for a retrofit.
Products for this job
- Heatmiser neoStat V3 smart thermostat 230V: £77
- Heatmiser neoAir wireless smart thermostat: £80
- Heatmiser Slimline-RF wireless thermostat: £57
- Heatmiser UH8-RF 8 zone wireless wiring centre: £134
- Heatmiser neoHub G3: £162
- Heatmiser neoStat-e electric floor thermostat: £83
- Heatmiser Slimline-E electric floor thermostat: £56
- All thermostats and controls
Related guides: Underfloor heating thermostats explained, Floor probes, air sensing and floor limits and Zoning, thermostats and wiring centres.
Not sure which controls fit your layout? Design the floor free with MaxHeatUFH ProLoop. Add your rooms and floor type, and get a loop design with zones and a full kit list, including matched thermostats, wiring centre and actuators, with prices. Start your design
Frequently asked questions
Is the neoAir better than the Slimline-RF?
The neoAir adds app control through a neoHub and can run heating and a timed output from one unit. The Slimline-RF is £23 cheaper per room, uses 2 AAA batteries instead of 4, and suits homeowners who want buttons only. Both pair with the UH8-RF.
Can I use a neoAir with a wired UH8 wiring centre?
No. The neoAir is a wireless thermostat and pairs with the UH8-RF wireless wiring centre or an RF-Switch receiver. The UH8 is for wired 230V thermostats.
Do neoStat thermostats work without the internet?
Yes. A neoStat V3 works as a normal programmable wall thermostat on its own. The neoHub and broadband are only needed for app control.
Can wired and wireless Heatmiser thermostats share one app?
Yes, if they are neo models on the same neoHub. A neoStat V3 on a UH8 and a neoAir on a UH8-RF can both join one neoHub G3, which supports up to 32 devices.
What is the difference between neoStat V3 and neoStat-e?
The neoStat V3 switches 3A to a wiring centre for water UFH or radiators. The neoStat-e switches up to 16A directly to an electric mat or cable, and a floor sensor comes in the box.
Which Heatmiser thermostat is best for a rental property?
A simple model with a key lock, such as the Slimline-RF for finished rooms or the Edge where cables can be run. The Edge has a PIN key lock and costs £47 inc VAT (October 2026).
Sources: Heatmiser neoStat V3 datasheet