Get quotes to fit TRVs (thermostatic radiator valves)

A thermostatic radiator valve (TRV) is the valve on one side of a radiator that has numbered options for the desired heat in the room. Most TRVs can be fitted to either the flow or return (Danfoss RAS-C² are bidirectional angle valves) but it is best to fit to the flow when possible. Think of a TRV as an on / off tap allowing water into the radiator on demand. The numbers refer to the heat in the room and when the room temperature drops below the heat setting, the TRV will allow heat to flow through to the radiator to warm the room to the desired temperature.

0 = Off

* = 7°C

1 = 10°C

2 = 15°C

3 = 20°C

4 = 25°C

5 = 30°C

A lockshield valve is the valve fitted on the other side (normally the return side) of the radiator but like the Danfoss RA-FS valves they are also bi-directional.

How much will it cost to fit TRVs (thermostatic radiator valves)?

Replacing valves for TRVs in your home will be dependent on the amount of hours the heating engineer needs to complete the task as well as the cost of the TRVs. A good quality well known brand like Danfoss RAS-C² bidirectional angle valve can set you back £12 with it coming paired with a lockshield for as little as £18 from stores like Screwfix.

A self-balancing TRV, Danfoss RAS-B2 will cost a bit more from £23 as it is a more upmarket specialised TRV.

How much labour costs to fit a TRV

Per

Average cost

Replacing a valve with a TRV

Per hour 

£40

Upgrading for a new pair of TRV and lockshield

Per hour 

£60 

Replacing a valve with a self-balancing valve

Per hour 

£30

Replacing 5x TRVs

Per job

£160

How do TRVs work?

The TRV is fitted to the side of the water flowing into the radiator. The valve will open and close to adjust flow of hot water into the radiator according to the temperature setting it has been set to.

The visible part of the TRV with numbers printed is referred to as the head and this sits on the valve body.  The TRV works by the valve head expanding or contracting depending on the temperature which in turn adjusts the pin of the valve head allowing more or less water to flow through the valve. An expanding valve due to a warmer room, pushes the pin down, allowing for less water flow in to the radiator which will result in less heat coming off the radiator, therefore the room will cool down and once this happens the valve head will no longer expand, releasing pressure from the pin, lifting the pin, for more water to enter the radiator, to warm the radiator and therefore warm the room until again it reaches the desired temperature with the valve body expanding.

TRVs or either wax or liquid models. Liquid TRVs are the modern valves (Danfoss do liquid sensor valves) and react quicker to heat changes than the older wax TRVs.

TRV vs Danfoss Self-balancing TRV

Now that we understand how TRVs work, what is the difference between a TRV and a self-balancing TRV like the Danfoss RAS-B2? Well, the self balancing valve is a 2-in-1 being even more energy efficient than a standard TRV as it acts as a temperature control and an automatic balancing valve.

Standard TRVs only limit the flow of water but Danfoss RAS-B2 have a differential pressure controller and the balance flow pre-setting saves labour costs by quickly and easily doing this on the TRV rather than on the lockshield. 

Do smart TRVs exist?

Some companies like Danfoss do smart electronic radiator thermostats (the Danfoss Eco™) where each individual room thermostatic radiator valve can be controlled via bluetooth on your smartphone in an app. This means even when you are not home, you can set an individual room to your desired heating. These TRVs are also able to be set manually for those moments where that might be easier.

Do I need to drain down my system to fit TRVs?

This depends on how many radiator valves are being changed. If you are wanting to upgrade your home to TRVs and looking to change a few radiator valves for TRVs then it will be easier to drain the water out of the heating system. Do not forget if draining down, when refilled to replenish your system with a central heating inhibitor to keep it protected from rust debris.

If you are replacing a faulty valve on one radiator, then best to change the TRV without draining down the entire system but rather releasing the pressure and draining down that radiator only. A gas engineer will be able to do this for you as it is a standard common job that they are used to doing in most homes due to replacing faulty valves or old leaky valves and upgrading older valves for modern TRVs.

Should I have TRVs on every radiator?

As TRVs can reduce the cost of energy bills, it is worth having them fitted to most rooms in the house to avoid paying for energy to heat rooms that are not used often. There should be one radiator in the home that is on permanently when the heating is switched on, without being heat adjusted by having a TRV attached to it.

Normally, people leave a bathroom radiator / towel rail without a TRV fitted to it or if there is a radiator near the thermostat, better to cleave that off from TRVs because a TRV on a radiator near the thermostat can leave the thermostat getting confused at whether it has reached temperature or not, and this might cause the thermostat to signal to the boiler to stay on longer giving and wasting more heat.


Estimates for common heating engineer jobs;

Job Estimate
Cost to replace a hot water immersion heater £275
Cost to fit underfloor heating £250
Cost to replace a vented hot water cylinder £330
Cost to replace a heating programmer £180
Cost to powerflush a central heating system £500 Visit
New combi or system boiler installation – like for like replacement £500
Cost to install a ground source heat pump £3750
Cost to fix a boiler fault error code £85
Cost to replace an unvented hot water cylinder, e.g., Megaflo £305
Cost to fit thermostatic radiator valves (TRVs) £94
Cost to fit smart heating controls £100
Cost to fit a radiator £80
Boiler service cost £90
Boiler repair costs (e.g. pump, diverter valve or heat exchanger) £333
Cost to install an air source heat pump £556
Replacement of a vented system £580

Rates for other trades

Fit thermostatic radiator valves (TRVs) cost in the UK
Fit thermostatic radiator valves (TRVs) cost in the UK (excluding VAT or callout charges)
Location in UKFit thermostatic radiator valves (TRVs) cost
Fit thermostatic radiator valves (TRVs) near Aberdeen£92
Fit thermostatic radiator valves (TRVs) near Amber Valley£94
Fit thermostatic radiator valves (TRVs) near Angus£86
Fit thermostatic radiator valves (TRVs) near Arun£106
Fit thermostatic radiator valves (TRVs) near Ashfield£92
Fit thermostatic radiator valves (TRVs) near Aylesbury Vale£114
Fit thermostatic radiator valves (TRVs) near Barnsley£88
Fit thermostatic radiator valves (TRVs) near Basildon£108
Fit thermostatic radiator valves (TRVs) near Basingstoke & Deane£128
Fit thermostatic radiator valves (TRVs) near Bassetlaw£84
Fit thermostatic radiator valves (TRVs) near Bath & North East Somerset£94
Fit thermostatic radiator valves (TRVs) near Bedford£110
Fit thermostatic radiator valves (TRVs) near Belfast£82
Fit thermostatic radiator valves (TRVs) near Birmingham£92
Fit thermostatic radiator valves (TRVs) near Blackburn£114
Fit thermostatic radiator valves (TRVs) near Blackpool£88
Fit thermostatic radiator valves (TRVs) near Bolton£106
Fit thermostatic radiator valves (TRVs) near Bournemouth£100
Fit thermostatic radiator valves (TRVs) near Bracknell Forest£126
Fit thermostatic radiator valves (TRVs) near Bradford£88
Fit thermostatic radiator valves (TRVs) near Braintree£104
Fit thermostatic radiator valves (TRVs) near Breckland£86
Fit thermostatic radiator valves (TRVs) near Bridgend£86
Fit thermostatic radiator valves (TRVs) near Brighton£108
Fit thermostatic radiator valves (TRVs) near Bristol£90
Fit thermostatic radiator valves (TRVs) near Broadland£102
Fit thermostatic radiator valves (TRVs) near Broxtowe£92
Fit thermostatic radiator valves (TRVs) near Bury£106
Fit thermostatic radiator valves (TRVs) near Caerphilly£82
Fit thermostatic radiator valves (TRVs) near Calderdale£84
Fit thermostatic radiator valves (TRVs) near Cambridge£104
Fit thermostatic radiator valves (TRVs) near Canterbury£102
Fit thermostatic radiator valves (TRVs) near Cardiff£84
Fit thermostatic radiator valves (TRVs) near Carmarthenshire£72
Fit thermostatic radiator valves (TRVs) near Charnwood£94
Fit thermostatic radiator valves (TRVs) near Chelmsford£104
Fit thermostatic radiator valves (TRVs) near Cheltenham£102
Fit thermostatic radiator valves (TRVs) near Cherwell£104
Fit thermostatic radiator valves (TRVs) near Chester£90
Fit thermostatic radiator valves (TRVs) near Colchester£102
Fit thermostatic radiator valves (TRVs) near Conway£78
Fit thermostatic radiator valves (TRVs) near Coventry£92
Fit thermostatic radiator valves (TRVs) near Crewe & Nantwich£88
Fit thermostatic radiator valves (TRVs) near Dacorum£120
Fit thermostatic radiator valves (TRVs) near Derby£90
Fit thermostatic radiator valves (TRVs) near Doncaster£88
Fit thermostatic radiator valves (TRVs) near Dover£104
Fit thermostatic radiator valves (TRVs) near Dudley£94
Fit thermostatic radiator valves (TRVs) near Dumfries & Galloway£82
Fit thermostatic radiator valves (TRVs) near Dundee£96
Fit thermostatic radiator valves (TRVs) near East Ayrshire£86
Fit thermostatic radiator valves (TRVs) near East Devon£82
Fit thermostatic radiator valves (TRVs) near East Dunbartonshire£98
Fit thermostatic radiator valves (TRVs) near East Hampshire£104
Fit thermostatic radiator valves (TRVs) near East Hertfordshire£112
Fit thermostatic radiator valves (TRVs) near East Lindsey£82
Fit thermostatic radiator valves (TRVs) near East Riding£84
Fit thermostatic radiator valves (TRVs) near Eastleigh£102
Fit thermostatic radiator valves (TRVs) near Edinburgh£98
Fit thermostatic radiator valves (TRVs) near Elmbridge£130
Fit thermostatic radiator valves (TRVs) near Epping Forest£126
Fit thermostatic radiator valves (TRVs) near Erewash£92
Fit thermostatic radiator valves (TRVs) near Exeter£86
Fit thermostatic radiator valves (TRVs) near Falkirk£98
Fit thermostatic radiator valves (TRVs) near Fife£90
Fit thermostatic radiator valves (TRVs) near Flintshire£90
Fit thermostatic radiator valves (TRVs) near Gateshead£98
Fit thermostatic radiator valves (TRVs) near Gedling£92
Fit thermostatic radiator valves (TRVs) near Glasgow£98
Fit thermostatic radiator valves (TRVs) near Gloucester£158
Fit thermostatic radiator valves (TRVs) near Guildford£126
Fit thermostatic radiator valves (TRVs) near Gwynedd£74
Fit thermostatic radiator valves (TRVs) near Halton£92
Fit thermostatic radiator valves (TRVs) near Harrogate£86
Fit thermostatic radiator valves (TRVs) near Havant & Waterloo£98
Fit thermostatic radiator valves (TRVs) near Highland£94
Fit thermostatic radiator valves (TRVs) near Horsham£118
Fit thermostatic radiator valves (TRVs) near Huntingdonshire£98
Fit thermostatic radiator valves (TRVs) near Ipswich£146
Fit thermostatic radiator valves (TRVs) near Isle of Wight£98
Fit thermostatic radiator valves (TRVs) near Kings Lynn & West Norfolk£92
Fit thermostatic radiator valves (TRVs) near Kingston-upon-Hull£84
Fit thermostatic radiator valves (TRVs) near Kirklees£86
Fit thermostatic radiator valves (TRVs) near Knowsley£90
Fit thermostatic radiator valves (TRVs) near Lancaster£92
Fit thermostatic radiator valves (TRVs) near Leeds£86
Fit thermostatic radiator valves (TRVs) near Leicester£94
Fit thermostatic radiator valves (TRVs) near Lisburn£80
Fit thermostatic radiator valves (TRVs) near Liverpool£90
Fit thermostatic radiator valves (TRVs) near London£128
Fit thermostatic radiator valves (TRVs) near Luton£118
Fit thermostatic radiator valves (TRVs) near Macclesfield£88
Fit thermostatic radiator valves (TRVs) near Maidstone£104
Fit thermostatic radiator valves (TRVs) near Manchester£92
Fit thermostatic radiator valves (TRVs) near Mid Bedfordshire£112
Fit thermostatic radiator valves (TRVs) near Mid Sussex£116
Fit thermostatic radiator valves (TRVs) near Middlesbrough£92
Fit thermostatic radiator valves (TRVs) near Milton Keynes£114
Fit thermostatic radiator valves (TRVs) near Neath Port Talbot£88
Fit thermostatic radiator valves (TRVs) near New Forest£98
Fit thermostatic radiator valves (TRVs) near Newbury£130
Fit thermostatic radiator valves (TRVs) near Newcastle-under-Lyme£86
Fit thermostatic radiator valves (TRVs) near Newcastle-upon-Tyne£98
Fit thermostatic radiator valves (TRVs) near Newport£84
Fit thermostatic radiator valves (TRVs) near North Ayrshire£90
Fit thermostatic radiator valves (TRVs) near North East Lincolnshire£82
Fit thermostatic radiator valves (TRVs) near North Hertfordshire£116
Fit thermostatic radiator valves (TRVs) near North Lanarkshire£96
Fit thermostatic radiator valves (TRVs) near North Lincolnshire£84
Fit thermostatic radiator valves (TRVs) near North Somerset£90
Fit thermostatic radiator valves (TRVs) near North Tyneside£98
Fit thermostatic radiator valves (TRVs) near North Wiltshire£112
Fit thermostatic radiator valves (TRVs) near Northampton£108
Fit thermostatic radiator valves (TRVs) near Norwich£100
Fit thermostatic radiator valves (TRVs) near Nottingham£90
Fit thermostatic radiator valves (TRVs) near Nuneaton & Bedworth£92
Fit thermostatic radiator valves (TRVs) near Oldham£92
Fit thermostatic radiator valves (TRVs) near Oxford£106
Fit thermostatic radiator valves (TRVs) near Pembrokeshire£68
Fit thermostatic radiator valves (TRVs) near Perth & Kinross£90
Fit thermostatic radiator valves (TRVs) near Peterborough£94
Fit thermostatic radiator valves (TRVs) near Plymouth£82
Fit thermostatic radiator valves (TRVs) near Poole£100
Fit thermostatic radiator valves (TRVs) near Portsmouth£98
Fit thermostatic radiator valves (TRVs) near Powys£104
Fit thermostatic radiator valves (TRVs) near Preston£118
Fit thermostatic radiator valves (TRVs) near Reading£126
Fit thermostatic radiator valves (TRVs) near Redcar & Cleveland£94
Fit thermostatic radiator valves (TRVs) near Reigate & Banstead£132
Fit thermostatic radiator valves (TRVs) near Renfrewshire£92
Fit thermostatic radiator valves (TRVs) near Rhondda, Cynon, Taff£84
Fit thermostatic radiator valves (TRVs) near Rochdale£92
Fit thermostatic radiator valves (TRVs) near Rochester-upon-Medway£104
Fit thermostatic radiator valves (TRVs) near Rotherham£86
Fit thermostatic radiator valves (TRVs) near Salford£92
Fit thermostatic radiator valves (TRVs) near Salisbury£102
Fit thermostatic radiator valves (TRVs) near Sandwell£94
Fit thermostatic radiator valves (TRVs) near Scarborough£82
Fit thermostatic radiator valves (TRVs) near Scottish Borders£110
Fit thermostatic radiator valves (TRVs) near Sefton£90
Fit thermostatic radiator valves (TRVs) near Sevenoaks£118
Fit thermostatic radiator valves (TRVs) near Sheffield£88
Fit thermostatic radiator valves (TRVs) near Slough£122
Fit thermostatic radiator valves (TRVs) near Solihull£94
Fit thermostatic radiator valves (TRVs) near South Ayrshire£90
Fit thermostatic radiator valves (TRVs) near South Bedfordshire£110
Fit thermostatic radiator valves (TRVs) near South Cambridgeshire£106
Fit thermostatic radiator valves (TRVs) near South Gloucestershire£92
Fit thermostatic radiator valves (TRVs) near South Kesteven£96
Fit thermostatic radiator valves (TRVs) near South Lanarkshire£92
Fit thermostatic radiator valves (TRVs) near South Oxfordshire£112
Fit thermostatic radiator valves (TRVs) near South Somerset£80
Fit thermostatic radiator valves (TRVs) near South Tyneside£98
Fit thermostatic radiator valves (TRVs) near Southampton£100
Fit thermostatic radiator valves (TRVs) near Southend-on-Sea£102
Fit thermostatic radiator valves (TRVs) near St Albans£122
Fit thermostatic radiator valves (TRVs) near St Helens£92
Fit thermostatic radiator valves (TRVs) near Stafford£90
Fit thermostatic radiator valves (TRVs) near Stockport£92
Fit thermostatic radiator valves (TRVs) near Stockton-on-Tees£94
Fit thermostatic radiator valves (TRVs) near Stoke-on-Trent£86
Fit thermostatic radiator valves (TRVs) near Stratford-on-Avon£102
Fit thermostatic radiator valves (TRVs) near Stroud£94
Fit thermostatic radiator valves (TRVs) near Suffolk Coastal£158
Fit thermostatic radiator valves (TRVs) near Sunderland£98
Fit thermostatic radiator valves (TRVs) near Swale£104
Fit thermostatic radiator valves (TRVs) near Swansea£84
Fit thermostatic radiator valves (TRVs) near Tameside£92
Fit thermostatic radiator valves (TRVs) near Teignbridge£90
Fit thermostatic radiator valves (TRVs) near Tendring£132
Fit thermostatic radiator valves (TRVs) near Test Valley£98
Fit thermostatic radiator valves (TRVs) near Thamesdown£110
Fit thermostatic radiator valves (TRVs) near Thanet£98
Fit thermostatic radiator valves (TRVs) near The Wrekin£96
Fit thermostatic radiator valves (TRVs) near Thurrock£108
Fit thermostatic radiator valves (TRVs) near Torbay£90
Fit thermostatic radiator valves (TRVs) near Trafford£94
Fit thermostatic radiator valves (TRVs) near Vale of Glamorgan£90
Fit thermostatic radiator valves (TRVs) near Vale of White Horse£102
Fit thermostatic radiator valves (TRVs) near Vale Royal£90
Fit thermostatic radiator valves (TRVs) near Wakefield£88
Fit thermostatic radiator valves (TRVs) near Walsall£92
Fit thermostatic radiator valves (TRVs) near Warrington£94
Fit thermostatic radiator valves (TRVs) near Warwick£94
Fit thermostatic radiator valves (TRVs) near Waveney£98
Fit thermostatic radiator valves (TRVs) near Waverley£120
Fit thermostatic radiator valves (TRVs) near Wealden£110
Fit thermostatic radiator valves (TRVs) near West Lancashire£90
Fit thermostatic radiator valves (TRVs) near West Lothian£102
Fit thermostatic radiator valves (TRVs) near West Wiltshire£112
Fit thermostatic radiator valves (TRVs) near Wigan£94
Fit thermostatic radiator valves (TRVs) near Windsor & Maidenhead£120
Fit thermostatic radiator valves (TRVs) near Wirral£90
Fit thermostatic radiator valves (TRVs) near Wokingham£128
Fit thermostatic radiator valves (TRVs) near Wolverhampton£96
Fit thermostatic radiator valves (TRVs) near Wrexham Maelor£104
Fit thermostatic radiator valves (TRVs) near Wychavon£98
Fit thermostatic radiator valves (TRVs) near Wycombe£124
Fit thermostatic radiator valves (TRVs) near York£86