Thermostatic valve (TRV)

A small dial on the radiator’s pipework controls how much hot water flows through. Set it once for the room temperature you want — the radiator does the rest automatically. The valve sits inside the casing for safety.

Concealed valve option

For care homes and schools, the valve can be locked behind the casing so residents or children can’t change the temperature. Staff have the key.

Smart TRV (optional)

Replace the standard dial with a smart TRV controlled by your phone or central thermostat. Set weekly schedules per room. Pairs with most smart heating systems.

Central thermostat compatible

Works with your existing wall thermostat — Nest, Hive, Tado, or a simple programmer. No special controls needed for Guardian LST specifically.

Pencil-proof grilles

Optional grille upgrade with smaller openings — stops residents in care homes pushing pencils or fingers into the radiator.

CleverBloom can help

If you want help choosing controls or pairing with your existing heating system, the engineer sorts it on the day. Or call us anytime.

1 · Low-H2O heat exchanger

A small aluminium-and-copper coil — holds 90% less water than a steel panel radiator. Hot water from your boiler or heat pump flows through it. The 30-year warranty covers this part.

2 · One-piece outer casing

Powder-coated steel casing surrounds the heat exchanger. The visible outer surface never exceeds 43°C — safe to lean against. Available in white, sandblast grey, or off-black as standard. Lightweight enough for a single installer.

3 · Rounded corners

The casing has rounded edges and a chamfered profile — no sharp corners. Designed specifically for healthcare and care-home environments where residents and patients may bump into furniture.

4 · Casing locks (standard)

The front panel is locked to the wall bracket with allen-key fixings. Stops residents, patients, or children from opening the casing. Standard on every Guardian LST.

5 · Top grille

Warm air leaves the radiator through the top grille. Optional pencil-proof version with smaller holes is available for care homes and schools — stops curious fingers or objects entering the casing.

6 · Concealed valves and pipework

The valves and pipes that connect to your heating system are hidden inside the casing — no exposed hot pipes for anyone to touch or knock. TRV optional on the valve for room-temperature control.

7 · Wall brackets

Two lightweight steel brackets fix to the wall. The casing then slides on and locks. One installer can fit it in 15 minutes — half the time of equivalent steel-panel LST radiators.

8 · CleverBloom can help

For care homes, schools, or NHS settings, we specify the right Guardian LST configuration (with or without pencil-proof grille, with or without TRV lock) during the site survey.

30-year heat-exchanger warranty

The Low-H2O heat exchanger inside the radiator is warranted for 30 years — one of the longest in the UK heating industry. Most boilers will need replacing several times in that period.

Built in Belgium

Made by Jaga at their Diepenbeek, Belgium factory. Jaga has been building radiators since 1962. The Low-H2O exchanger is their patented design.

Wipe clean

Powder-coated casing wipes clean with a soft damp cloth. The casing locks let staff open the radiator for inside cleaning if dust builds up over years.

No bleeding service

The radiator is bled once at install and stays balanced. No annual bleeding routine for housekeeping staff to remember.

Service plan available

For multi-unit installations in care homes or schools, CleverBloom offers annual maintenance contracts covering all radiators on one visit.

No VAT on the install

UK government has removed VAT on heating installs until March 2027 when paired with energy-saving systems like heat pumps. CleverBloom handles the paperwork.