Radiator thermostats

Overview
How it works
FAQ
Documents
Related products

Danfoss radiator thermostats help you optimise the heating of your home—and save money without compromising on comfort.

You can easily set and maintain your preferred temperature, even down to each individual room. Maybe you like your living room nice and warm but want to keep a rarely used spare room at minimum temperature?

Plus, heating your home more efficiently allows you to lower your heating bill. In fact, there’s a good chance that you can reduce your heat consumption significantly simply by upgrading your thermostats.

Danfoss invented the radiator thermostat more than 80 years ago and today, more than 40 million homes are heated with this technology.

Our extensive range of radiator thermostats are robustly built and designed to meet the demands of domestic life while increasing comfort and saving energy.

Features and benefits

Danfoss radiator thermostats maintain your desired room temperatures for optimal comfort in your home — room by room.

Fast reaction time compared to a manual thermostat helps lower your energy consumption — and reduce your heating bill.

Fast and easy installation

Service life of 20+ years thanks to its gas-charged, precision-manufactured sensors. Unlike other fillings, gas maintains a high regulating capacity and reactivity.

Mechanical, smart or design thermostat?

Mechanical radiator thermostats

Are you looking for the updated range of radiator thermostats?

Go to mechanical radiator thermostats

Smart radiator thermostats

Are you more into smart thermostats that can be controlled via your smart phone?

Go to smart heating

Design thermostats

Explore our range of mechanical design radiator thermostats

Go to design thermostats

Energy savings

Self-regulating thermostatic radiator valves can save a lot of energy compared to manual valves. Studies show that the energy savings potential going from manual to thermostatic is between 30-36%. Going from a 15+ year old thermostat to electronic thermostats opens for another 23% savings to tap. The newer the technology, the more savings. Each leave does not represent an exact figure but gives a rough illustration on the energy savings performance.

Learn more about the energy savings potential of installing thermostatic radiator valves

Comfort level

Comfort performance is closely linked to the thermostats ability to keep the temperature as close as possible to the set point. Two main factors affect the performance; precise temperature control and reaction time. Our thermostats span from 1-22 min response time depending on the filling inside the bellow.
Each house symbol on the overview does not represent an exact figure but gives a rough illustration on the added performance on temperature regulation and comfort. Learn more about the effect of response time below.

Response time

Response time is the time it takes before the thermostats detects a change in temperature, and then starts to compensate for it by opening or closing the valve, to either lower or increase the temperature in the room, to reach the desired set temperature. Not to be mixed with the time it takes for the thermostat to restore the set temperature in the room.

Response time is closely linked to the filling medium inside the bellow of the thermostat. Wax is the slowest (40 min) where Danfoss does not have an offering. Then comes liquid (15-22 min) and our premium gas (10 min) which is the fastest reacting mechanical thermostat on the market. Finally, electronic components as the top-performer with 1 min response time.
The faster the response time, the better the comfort.

Learn more about reaction time and how it effects thermostat performance

Installation

Tells you what tool is required to install the thermostat. The symbol with the click-lock function represents our patented tool-free installation feature that allows you to install the thermostats using only your hands. This patented solution also makes sure that the clamping force is adequate, so it will not damage the thermostat or the valve but still securing a very firm grip.

Valve connection

Provides you with a quick overview of which connection types fit with our thermostats, so you easily can pick what type of thermostat to choose for replacement. In the mechanical range, you get the most options from the Aveo^TM and the Aero^TM which fits RA, RAV, RAVL and RTD valves. From the electronic range, you get a broad range of options with the adapter system that fits 90+% of all radiator valves out there.

Recommended radiator thermostat settings

How Thermostatic Radiator Valves increase condensing boiler efficiency

Explanation of symbols on your radiator thermostat

Check your savings potential

Upgrading your old radiator thermostats is a quick and easy way to reduce your energy consumption — and lower your heating bill. Want to know how much you can save? Check out our infographic to find out.

Learn more

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Find the right product

Check out our easy and simple product overview and find exactly what you need. We have a radiator thermostat (TRV) for any challenge.

How it works

These videos cover essential information on radiator thermostat settings, symbols, and how thermostatic radiator valves can increase condensing boiler efficiency. Radiator thermostats are a fast and cheap way to optimize the heating system.

Danfoss Aveo^TM

Danfoss RA2000 series

How a radiator thermostats works

Recommended settings on your radiator thermostat

Explanation of symbols on your radiator thermostat

How Thermostatic Radiator Valves increase condensing boiler efficiency

FAQ

How to save energy with using all radiators?

You save nothing by having one on full throttle and the others closed. In fact, a fully heated radiator will use more heat than 2 or 3 that are turned only a quarter of the up. This is especially true when you use district heating.

How do you ventilate a room?

When ventilating a room, turn down your thermostat and leave the windows open for 5-6 minutes. If you don’t turn down your thermostat, it will react to the draft by heating up automatically.

What should be the minimum temperature in a room?

Always maintain a minimum of 16 degrees in all rooms. Never go below 14 degrees; this might damage the building and cause dampness, condensation and mold.

How do you use sleep mode?

Save energy and money by turning your radiators down 2-3 degrees at night. But remember: If you turn them down more than 3 degrees, the money you could save will be used on reheating the room again.

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Data sheet	Adapters for thermostatic sensors	Latvian	Multiple	31 Jan, 2024	418.4 KB	.pdf
Data sheet	Adapters for thermostatic sensors	English	Multiple	31 Jan, 2024	394.6 KB	.pdf
Data sheet	Adapters for thermostatic sensors	Lithuanian	Multiple	31 Jan, 2024	416.6 KB	.pdf
Data sheet	Adapters for thermostatic sensors	German	Multiple	22 Jan, 2024	420.5 KB	.pdf
Data sheet	Éléments thermostatiques RAE	French	Multiple	09 Jan, 2013	8.0 MB	.pdf
Data sheet	FJVR	Ukrainian	Ukraine	24 Dec, 2021	204.2 KB	.pdf
Data sheet	RAE thermostatic sensors	Czech	Multiple	08 Sept, 2014	1.3 MB	.pdf
Data sheet	RAE thermostatic sensors	Spanish, Castilian	Multiple	08 Sept, 2014	1.2 MB	.pdf
Data sheet	RAE thermostatic sensors	Latvian	Latvia	04 Oct, 2021	857.1 KB	.pdf
Data sheet	RAE thermostatic sensors	Hungarian	Multiple	08 Sept, 2014	1.2 MB	.pdf
Data sheet	RAE thermostatic sensors	Italian	Multiple	27 Apr, 2011	566.0 KB	.pdf
Data sheet	RAE thermostatic sensors	German	Multiple	13 Aug, 2020	1.4 MB	.pdf
Data sheet	RAE thermostatic sensors	Dutch, Flemish	Multiple	08 Sept, 2014	1.1 MB	.pdf
Data sheet	RAE thermostatic sensors	English	Multiple	08 Aug, 2014	1.3 MB	.pdf
Data sheet	RAE thermostatic sensors	Romanian, Moldavian, Moldovan	Multiple	08 Sept, 2014	1.3 MB	.pdf
Brochure	RAS-D2 Sales Leaflet	English	United Kingdom	11 Sept, 2014	580.8 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Danish	Multiple	04 Jun, 2013	991.4 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Lithuanian	Multiple	07 Jun, 2013	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Latvian	Multiple	07 Jun, 2013	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Serbian (RS)	Multiple	05 Nov, 2009	589.5 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Swedish	Multiple	07 Jun, 2013	995.8 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Polish	Multiple	04 Jan, 2016	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	English	Multiple	04 Jun, 2013	678.2 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Slovak	Multiple	20 Jan, 2016	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	German	Multiple	01 Sept, 2020	1.4 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Czech	Multiple	07 Jun, 2013	1.1 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Romanian, Moldavian, Moldovan	Multiple	20 Jan, 2016	1.0 MB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Latvian	Multiple	01 Sept, 2010	708.3 KB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Romanian, Moldavian, Moldovan	Multiple	16 Jul, 2015	501.2 KB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	English	Multiple	05 May, 2011	8.8 MB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Estonian	Multiple	08 Nov, 2016	218.3 KB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Lithuanian	Multiple	20 May, 2016	306.2 KB	.pdf

Related products

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Radiator valves and thermostatic radiator valves

Robustly built and designed to meet the rigors of the commercial and industrial sectors, a comprehensive range of Danfoss radiator valves is available for practically all systems and installation conditions.
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Electronic radiator thermostats

Electronic radiator thermostat Danfoss Eco™ is the stand-alone smart radiator thermostat that gives you in-home control of your radiator heating.


Type	Name	Language	Valid for	Updated	Download	File type
Data sheet	Adapters for thermostatic sensors	Latvian	Multiple	31 Jan, 2024	418.4 KB	.pdf
Data sheet	Adapters for thermostatic sensors	English	Multiple	31 Jan, 2024	394.6 KB	.pdf
Data sheet	Adapters for thermostatic sensors	Lithuanian	Multiple	31 Jan, 2024	416.6 KB	.pdf
Data sheet	Adapters for thermostatic sensors	German	Multiple	22 Jan, 2024	420.5 KB	.pdf
Data sheet	Éléments thermostatiques RAE	French	Multiple	09 Jan, 2013	8.0 MB	.pdf
Data sheet	FJVR	Ukrainian	Ukraine	24 Dec, 2021	204.2 KB	.pdf
Data sheet	RAE thermostatic sensors	Czech	Multiple	08 Sept, 2014	1.3 MB	.pdf
Data sheet	RAE thermostatic sensors	Spanish, Castilian	Multiple	08 Sept, 2014	1.2 MB	.pdf
Data sheet	RAE thermostatic sensors	Latvian	Latvia	04 Oct, 2021	857.1 KB	.pdf
Data sheet	RAE thermostatic sensors	Hungarian	Multiple	08 Sept, 2014	1.2 MB	.pdf
Data sheet	RAE thermostatic sensors	Italian	Multiple	27 Apr, 2011	566.0 KB	.pdf
Data sheet	RAE thermostatic sensors	German	Multiple	13 Aug, 2020	1.4 MB	.pdf
Data sheet	RAE thermostatic sensors	Dutch, Flemish	Multiple	08 Sept, 2014	1.1 MB	.pdf
Data sheet	RAE thermostatic sensors	English	Multiple	08 Aug, 2014	1.3 MB	.pdf
Data sheet	RAE thermostatic sensors	Romanian, Moldavian, Moldovan	Multiple	08 Sept, 2014	1.3 MB	.pdf
Brochure	RAS-D2 Sales Leaflet	English	United Kingdom	11 Sept, 2014	580.8 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Danish	Multiple	04 Jun, 2013	991.4 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Lithuanian	Multiple	07 Jun, 2013	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Latvian	Multiple	07 Jun, 2013	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Serbian (RS)	Multiple	05 Nov, 2009	589.5 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Swedish	Multiple	07 Jun, 2013	995.8 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Polish	Multiple	04 Jan, 2016	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	English	Multiple	04 Jun, 2013	678.2 KB	.pdf
Data sheet	Return temperature limiter type FJVR	Slovak	Multiple	20 Jan, 2016	1.0 MB	.pdf
Data sheet	Return temperature limiter type FJVR	German	Multiple	01 Sept, 2020	1.4 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Czech	Multiple	07 Jun, 2013	1.1 MB	.pdf
Data sheet	Return temperature limiter type FJVR	Romanian, Moldavian, Moldovan	Multiple	20 Jan, 2016	1.0 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Croatian	Croatia	16 Jan, 2025	9.3 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Hungarian	Hungary	11 Feb, 2025	52.4 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Slovenian	Slovenia	16 Jan, 2025	9.4 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Romanian, Moldavian, Moldovan	Romania	11 Feb, 2025	52.5 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Serbian (RS)	Serbia	16 Jan, 2025	9.4 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Czech	Czech Republic	11 Feb, 2025	52.5 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Bulgarian	Bulgaria	11 Feb, 2025	52.5 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Ukrainian	Ukraine	11 Feb, 2025	52.5 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	English	Multiple	03 Oct, 2023	2.3 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Swedish	Sweden	02 Jan, 2024	2.9 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Polish	Poland	12 Dec, 2023	2.9 MB	.pdf
Case story	Save energy and money with AI and dynamic balancing	Finnish	Finland	06 Nov, 2023	2.8 MB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Latvian	Multiple	01 Sept, 2010	708.3 KB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Romanian, Moldavian, Moldovan	Multiple	16 Jul, 2015	501.2 KB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	English	Multiple	05 May, 2011	8.8 MB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Estonian	Multiple	08 Nov, 2016	218.3 KB	.pdf
Data sheet	Thermostatic Sensors RAS-C & RAS-CK	Lithuanian	Multiple	20 May, 2016	306.2 KB	.pdf

Environmental Product Declaration (EPD) Documents


Type	Name	Language	Valid for	Updated	Download	File type
Product Environmental Information - BI	EPD Aveo and Aero radiator thermostat, BIS	English	Multiple	13 Apr, 2023	2.6 MB	.pdf
Product Environmental Information - BI	EPD Aveo and Aero radiator thermostat, RS	English	Multiple	13 Apr, 2023	2.6 MB	.pdf
Product Environmental Information - BI	EPD for REACT, REDIA and REGUS radiator sensors	English	Multiple	06 Mar, 2024	3.3 MB	.pdf

Interested in more tips and advice?

From simple or more advanced upgrades to smarter heating of your home, Danfoss products and solutions can help you take control of your heat consumption — whatever your heating bill is up against.

Learn more

Radiator thermostats

Danfoss radiator thermostats help you optimise the heating of your home—and save money without compromising on comfort.

Features and benefits

Mechanical, smart or design thermostat?

Check your savings potential

Installer Life made easier

Find the right product

How it works

Danfoss AveoTM

Danfoss RA2000 series

How Thermostatic Radiator Valves increase condensing boiler efficiency

FAQ

Documents

Related products

Environmental Product Declaration (EPD) Documents

Interested in more tips and advice?

Danfoss Aveo^TM