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Best Heimeier thermostat head

Updated: October 2026

You want one Heimeier head named, and the review count on amazon.co.uk pulls you towards a single listing before you have looked at the valve. The best Heimeier thermostat head in this set is conditional. It is the liquid-filled K with a Danfoss RAVL connection only if that collar is on the radiator. On a plain M30 insert it is the wrong default, however many stars it has. Prices sit on the [Heimeier thermostat](/hub/thermostats/heimeier-thermostat) comparison. Listings were captured on 15 October 2026. We did not run a lab test. A qualifying purchase through our links can earn a commission at no extra cost to you.

You want one Heimeier head named, and the review count on amazon.co.uk pulls you towards a single listing before you have looked at the valve. The best Heimeier thermostat head in this set is conditional.

Our top picks

Sanitop-Wingenroth Heimeier K, Danfoss RAVL

Best overall

Sanitop-Wingenroth Heimeier K, Danfoss RAVL
9.0/10about £22.75
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Heimeier Heimeier 9712-00.500 for Vaillant

Rank 2

Heimeier Heimeier 9712-00.500 for Vaillant
8.4/10about £29.67
View offer
Heimeier Heimeier K-Eco 6071-43.500

Preis-Tipp

Heimeier Heimeier K-Eco 6071-43.500
5.0/10about £19.00
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On this page
  1. 1.The top pick when the valve is Danfoss RAVL
  2. 2.Who should skip it
  3. 3.What the reviews repeat
  4. 4.What best does not mean here

The top pick when the valve is Danfoss RAVL

The top pick is the Heimeier-style K head sold as a Danfoss RAVL connection, listing B0711Y7V9F, at about £22.75. The rating line is 4.5 out of 5 from 285 reviews, the only large review file in this comparison. The bullets describe a liquid-filled head with a fixed sensor, a setpoint from 6 °C to 28 °C, marks 1–5, and frost protection. The title also prints 26 mm. Reviewers in the first stretch of that file say it fits a RAVL-style valve without an adapter and turns more easily than a stiff Danfoss head. The brand field says Sanitop-Wingenroth. The item type says a Heimeier thermostatic head K, model 27135 6. IMI lists a K for Danfoss RAVL as article 9700-24.500. Say both numbers. Do not treat 27135 6 and 9700-24.500 as the same printing on this Amazon box. That is the top pick when you can see a RAVL collar. If the collar is anything else, leave this listing even though it has the stars.

Who should skip it

Skip it when the insert is M30×1.5. The head for that thread in this set is the K-Eco 6071-43.500 at about £19.00, which prints M30×1.5, frost protection, and a short scale of 16 °C, Eco at 20 °C, and 24 °C. That listing has no review line. You are choosing a stated thread over a star rating that belongs to a different connection. The Heimeier thermostat buying guide keeps the rest of that tree, including when a valve body is the failed part. Skip it when the body is Vaillant. Article 9712-00.500 is in this set at about £29.67, with 4.2 from 4 reviews and one printed UK review that says it fitted Vaillant valves. That is a narrow file, and it is not a second top pick. Skip it when the head will sit behind curtains, a cabinet, or in a tight niche. A built-in sensor in a hot enclosure throttles the radiator early. The 5 m remote adjuster is about £64.15 and has no reviews. Paying more there does not improve a RAVL swap on an open radiator.
Sanitop-Wingenroth Heimeier K, Danfoss RAVL

Testsieger

Sanitop-Wingenroth Heimeier K, Danfoss RAVL
9.0/10about £22.75
View offer

What the reviews repeat

The 285-review line is an amazon.co.uk rating, and the raw file mixes reviews from the UK, Germany, France, Belgium, and Sweden. Themes here come from the first stretch of that list, about 50 reviews, not from a fresh sample. Do not read the count as 285 separate UK site surveys. Praise is practical: reliable, smooth to adjust, easy to fit, a RAVL-style valve without an adapter, and easier to turn than a stiff Danfoss head. The complaint that returns is the plastic claw or teeth. Reviewers fear they snap, and one describes broken teeth on older heads of this type. The head sticks out. One unit did not open or close the radiator and was returned at the buyer’s cost. One report describes a broken inner tip. There is no pattern of app or electrical failure. A question about a child lock is unanswered. The bullets describe marks 1–5, not a timed programme.

What best does not mean here

Best, on this page, means the most reviewed head that matches one collar. It does not mean a test lab, a KEYMARK stamp, or a winner across every wet system in the UK. The 4.5 from 285 is a shop rating. IMI’s sheets are not a score for seller part 27135 6. Listings on other Amazon sites, including 7000-00.500 and 6000-00.500, are not a UK star rating. This kept file does not include a plain 6000-00.500 head. The HEIMFF row at about £14.51 is a white K 7000-style head with four reviews and no thread, so it is not a quiet substitute for the RAVL head. Remember the collar. RAVL, and you are looking at about £22.75. M30, and you are looking at the K-Eco at about £19.00. Vaillant, and you are looking at 9712-00.500. Covered, and you are looking at a capillary you have measured.

Common questions

Which Heimeier head has the most UK-visible reviews in this set?
The RAVL K head at about £22.75, with 4.5 from 285 reviews. Every other kept listing has four reviews, or no review line at all. The Vaillant head is 4.2 from 4, with one printed review. The HEIMFF head is 3.5 from 4. The K-Eco, the valve body, the thermostat top, and both capillary heads have no customer-review line in the raw files.
Is 4.5 from 285 a lab test?
No. It is the amazon.co.uk rating line. The raw file is a mixed European review list, and the themes used here are from the opening stretch of that list. IMI publishes its own head data, including a 6–28 °C scale for the RAVL K article 9700-24.500. That catalogue line is not a test stamp on seller part 27135 6, and there is no KEYMARK mark in the Amazon text.
What should an M30 house buy instead?
The K-Eco 6071-43.500 at about £19.00, which prints M30×1.5. The scale on the Amazon bullets is 16 °C, Eco at 20 °C, and 24 °C, with frost protection, and there are no reviews. That is a thinner file than the RAVL head. It is still the head whose connection matches a standard Heimeier insert, which the RAVL listing does not claim to do.
Is the Sanitop-Wingenroth brand line still a Heimeier K head?
The listing’s brand field is Sanitop-Wingenroth. The item type, the included-components line, and the way reviewers describe it say a Heimeier thermostatic head K for Danfoss valves. Treat it as that K-style RAVL head, and keep the seller part 27135 6 separate from IMI article 9700-24.500. If the box that arrives does not say RAVL, send it back rather than adapting it on the radiator.
Does a higher price make a better head?
Not in this set. The remote adjuster at about £64.15 and the 2 m head at about £58.92 cost more because of the capillary and the remote job, and neither has a review line or a printed thread. They are not an upgrade on an open RAVL valve. The about £14.51 head is cheaper and has four short positive reviews, but it does not name a connection, so it is not a bargain substitute for the RAVL pick.

Related pages

Heimeier vs Danfoss thermostat

Heimeier remote sensor thermostat

Heimeier thermostat

Heimeier thermostat buying guide: head, body, thread

How to fit a Heimeier thermostat on a matching valve

Sources

Public sources are IMI head data, BS EN 215:2019, Approved Document L, the BEAMA installer factsheet, and Energy Saving Trust. Listings are the amazon.co.uk captures for these eight ASINs on 15 October 2026, not a live reload. Prices on amazon.co.uk move. A KEYMARK line on an IMI datasheet is not a mark on an ASIN that does not print it.

  1. IMI thermostatic head K (retrieved 15 October 2026)
  2. IMI heads for other manufacturers (retrieved 15 October 2026)
  3. IMI UK TRV pack Eclipse (retrieved 15 October 2026)
  4. BSI, BS EN 215:2019 (retrieved 15 October 2026)
  5. Approved Document L Volume 1 (retrieved 15 October 2026)
  6. BEAMA TRV factsheet (retrieved 15 October 2026)
  7. Energy Saving Trust, thermostats and heating controls (retrieved 15 October 2026)
  8. amazon.co.uk listings in this set (retrieved 15 October 2026)