Can I keep my existing wiring?

Usually yes, most smart stats are designed to drop onto existing 230V or low-voltage wiring. Where wiring is very old or non-compliant, we'll quote a tidy-up at the same time.

Hive and tado° need a small hub plugged into your router. Nest doesn't. We'll bring everything needed on the day.

Can you zone an existing one-zone system?

Often yes, by adding a motorised zone valve and a second stat. We'll survey first and tell you honestly whether it's a clean upgrade or a 'live with smart TRVs instead' situation.

Will the app keep working if my internet goes down?

Yes, your schedules run locally on the stat. You just lose remote control until the internet's back.

Do you fit smart TRVs?

Yes, tado°, Drayton Wiser and Honeywell evohome smart TRVs. We'll always check radiator valve bodies first (some 1990s bodies need swapping).

Heating controls · Smart · Wired right

Smart Thermostats
& Heating Controls

Hive, Nest, tado° or Honeywell, supplied, wired and commissioned by Gas Safe engineers who actually understand the heating system behind the app.

Get my controls quote 07584 076105

Installs typically completed in 2–3 hours · App set up before we leave · 12-month workmanship guarantee

Hive, Nest, tado° & Honeywell approved installs
Gas Safe registered (Co. 15149175)
Wiring centres, zoning & TRVs
Set up on your phone before we leave
Fully insured to £5m

Service overview

What thermostats & heating controls actually involves.

Plain-English breakdown, so you know exactly what you're paying for, and why it matters before we set foot on site.

What it is

Supply, install and commission smart thermostats, room stats, programmers, wiring centres, zone valves and thermostatic radiator valves (TRVs) across St Albans and Hertfordshire, for combis, system boilers and unvented setups.

Who it's for

Homeowners upgrading from a 1990s programmer, anyone with cold rooms and hot rooms on the same circuit, and customers who've bought a smart stat but don't want to wire it themselves.

When you need it

Same-week slots. Most installs are 2–3 hours on site, including app setup.

Why it matters

A smart stat wired into the wrong terminals will heat your house, badly, expensively, and unpredictably. Gas Safe engineers wire to the boiler's actual control logic, not a guess.

The cost of doing nothing

What goes wrong when this is ignored.

Most smart-stat regrets we hear come from a self-install or a generalist sparky who didn't understand the boiler's call-for-heat logic.

Risks of waiting

Boiler short-cycling because the stat is wired as a simple on/off switch instead of OpenTherm
One room baking while others stay cold, no zoning, no balancing
Hot water firing 24/7 because the cylinder stat was bypassed in the wiring

Common mistakes

Buying a stat that isn't compatible with your boiler's modulation protocol
Putting the room stat above a radiator or in direct sun, it'll never read true
Leaving every TRV on max and wondering why the bills haven't dropped

Our process

How the job actually runs.

Same system every time. No improvising on your floor.

01
Quick compatibility check
Tell us your boiler make/model. We'll confirm what stat works best (OpenTherm vs on/off, S-plan vs Y-plan).
02
Fixed quote
Supply + fit, or fit-only if you've bought the kit. Priced in writing before we book.
03
Install & commission
Old stat / programmer out, wiring centre tidied, new controls in, system tested through a full heat cycle.
04
App setup on your phone
We don't leave until your app is logged in, schedules are loaded and you've used it once.

What you get

The outcomes that matter.

Real energy savings

Proper scheduling, true setback and per-room control routinely cut heating bills by 15–25%.

Warm where you want it, when you want it

Zoning + smart schedules means no more heating empty bedrooms all day.

Boiler runs cooler and longer

Modulating controls (OpenTherm) match boiler output to demand, less wear, fewer breakdowns.

Remote control & holiday mode

Heating off when you're away, warm when you land, from your phone.

Multi-zone where it makes sense

Upstairs/downstairs zones, or a separate hot water schedule on system boilers.

Set up properly the first time

Wiring centre tidied, every wire labelled, schedule explained, not 'here's the app, good luck'.

In depth

Everything worth knowing before you book.

The details a salesperson skips. Skim it, or read every word, both are useful.

Questions on this?

Talk to a Gas Safe engineer direct.

07584 076105

Which smart thermostat is right for your boiler?

Hive Active Heating is the easiest all-rounder and works with almost any boiler as a simple on/off control. Google Nest Learning gives the best schedule auto-learning but needs careful placement. tado° is the strongest for multi-room/TRV-based zoning without re-piping. Honeywell evohome is the gold standard for full multi-zone (up to 12 rooms) on a single combi or system boiler. We'll recommend based on your boiler, layout and how the house is actually used, not whatever's on offer that week.

OpenTherm vs on/off, and why it matters

Modern combis (Worcester Greenstar 8000, Vaillant ecoTEC, Ideal Vogue Max, Baxi 800) support OpenTherm, a two-way protocol that lets the stat tell the boiler exactly how hard to fire. The boiler modulates down to ~20% output instead of cycling full-on / full-off. Real-world result: quieter operation, lower flow temps, lower bills, less wear. We always wire OpenTherm where the boiler supports it.

Zoning, TRVs and balancing

A single thermostat in the hallway can't make every room comfortable. We'll typically pair a good central stat with quality TRVs (Drayton TRV4, Honeywell, or smart TRVs for full per-room control), then balance the lockshields so each radiator gets the right flow. The result is even temperatures, not 'living room 24, spare room 16'.

Hot water programming on system boilers

On system or regular boilers with a cylinder, hot water is a separate schedule from heating. We set up a sensible default (typically 6–8am and 5–9pm) and show you how to override for one-offs. Includes a Legionella cycle on unvented setups.

What we leave you with

A tidy wiring centre, every wire labelled, your app logged in on your phone (and a partner's phone if needed), schedule loaded, and a one-page summary of what each button and mode actually does. No mystery.

General work gallery

Recent Heatrite jobs that show the standard of our work.

A broader look at recent installs, hot water systems, testing work and finished jobs across domestic and commercial sites.

Commercial boiler internals during installation with exposed heat exchanger and neatly routed pipework — Commercial heating
Installed and commissioned by Heatrite.

Twin commercial boiler setup with both front panels removed for servicing and commissioning — Commercial heating
Installed and commissioned by Heatrite.

Wall-mounted Vaillant boiler installation with insulated pipework and copper connections — Boiler installation
Installed and commissioned by Heatrite.

External oil tank installation positioned neatly between brick walls — Oil heating
Installed and commissioned by Heatrite.

Baxi unvented hot water cylinder fitted in a compact airing cupboard with copper pipework — Unvented cylinders
Installed and commissioned by Heatrite.

Multiple Stelrad hot water cylinders installed with expansion vessels and tidy copper distribution pipework — Hot water systems
Installed and commissioned by Heatrite.

Outdoor Vaillant boiler cabinet installation with exposed copper pipework and balanced flue — Boiler installation
Installed and commissioned by Heatrite.

Commercial gas purge and flame testing setup outside a brick building — Gas testing
Installed and commissioned by Heatrite.

Finished cloakroom installation with herringbone wall tiles and wall-hung toilet — Bathroom installation
Installed and commissioned by Heatrite.

Unvented hot water cylinder installation with neat copper pipework routed in a compact cupboard — Unvented cylinders
Installed and commissioned by Heatrite.

Freestanding bath installation with illuminated wall niches in a finished bathroom — Bathroom installation
Installed and commissioned by Heatrite.

New Vaillant boiler installation with exposed copper pipework and clean wall finish — Boiler installation
Installed and commissioned by Heatrite.

Commercial plant room with multiple large heating units and insulated pipework — Commercial heating
Installed and commissioned by Heatrite.

Vaillant boiler installation in a service cupboard with diagnostic equipment attached — Boiler installation
Installed and commissioned by Heatrite.

Commercial heating installation with multiple wall-mounted units and copper distribution pipework — Commercial heating
Installed and commissioned by Heatrite.

Vaillant boiler fitted in a utility room with tidy vertical pipework connections — Boiler installation
Installed and commissioned by Heatrite.

Hot water cylinder and underfloor heating manifold installation with twin circulating pumps — Hot water systems
Installed and commissioned by Heatrite.

Pressurised hot water cylinder installation with expansion vessels and control components — Hot water systems
Installed and commissioned by Heatrite.

External heating unit installed neatly beside a brick wall with isolated service connections — Oil heating
Installed and commissioned by Heatrite.

Tall unvented hot water cylinder installation fitted neatly into bespoke white cabinetry with copper pipework — Unvented cylinders
Installed and commissioned by Heatrite.

Vaillant boiler fitted inside a tall cupboard with concealed services and tidy copper pipework — Boiler installation
Installed and commissioned by Heatrite.

Stainless hot water cylinder installation in a storage room with neatly routed copper connections — Unvented cylinders
Installed and commissioned by Heatrite.

Commercial cascade boiler installation with twin wall-mounted units and extensive plant room pipework — Commercial heating
Installed and commissioned by Heatrite.

Large commercial calorifier installation in a plant room with insulated pipework and control panel — Commercial heating
Installed and commissioned by Heatrite.

Blue pressurised vessel positioned in a basement plant room during hot water system upgrade works — Hot water systems
Installed and commissioned by Heatrite.

Plant room expansion vessel and Vaillant boiler installation with insulated services and pressure gauge — Commercial heating
Installed and commissioned by Heatrite.

Frequently asked

Straight answers, no fluff.

Can't see your question? Call 07584 076105.

Yes, most homes see 15–25% off heating bills in the first full winter, mainly from proper scheduling and avoiding the 'on all day at 21°' default. The bigger the house and the more variable the occupancy, the bigger the saving.

Payment & finance

Card, Klarna or Clearpay, pay the way that suits you.

Boilers, bathrooms and larger installs can be spread over time with Klarna or Clearpay finance, just ask when you book.

Card payments on site

We carry a card machine in the van, tap, chip & PIN or contactless on completion.

Klarna

Spread the cost of your boiler or bathroom install with flexible Klarna finance options.

Clearpay

Pay over time with Clearpay, ideal for boilers, cylinders and full bathroom fits.

Ready when you are

Book your thermostats & heating job today.

Written fixed quote. Gas Safe engineer. No upsell, no pressure.