The 10 Best Greenhouse Heaters In The UK (2022)

Best Greenhouse Heaters Reviews

Last Updated on January 15, 2022

In this article, we have rounded up the best greenhouse heaters you can buy today. A greenhouse can be an idyllic retreat in even the smallest of places. This miniature paradise is incredibly sensitive, though. If the temperature suddenly plummets, you can forget those baby strawberries.

You do not have to spend a fortune on heaters for greenhouses, and we’ve done all the leg work for you. So sit back, relax and check out our top 10 best greenhouse heaters.

Our Top 3 Greenhouse Heater Picks
1. The Best Greenhouse Heater By Sunhouse
2. The Best Greenhouse Heater With Discreet Brackets By Dimplex
3. The Best Greenhouse Heater For Sheds By Hausen

Product Testing & Comparing

To bring our readers the best greenhouse heaters, our review team considered the quality designs and features of this year’s most popular models. At the end of the day, we narrowed them down to 10 heaters that are truly useful and cosy enough to keep your plants happy. We also ranked them according to our favourites and how useful we found their features.

We also highlighted the following important specifications of each heater. These should, at a glance, help you to find something that suits your needs.

  1. The size.
  2. Weight.
  3. Power output.

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These Are The Best Greenhouse Heaters Reviewed In 2022


1. Sunhouse (Dimplex Group) SHTTH2

The Best Greenhouse Heater

SHTTH2 80W Low Energy Tubular

Product Specifications

  • Size: 7 x 9.5 x 83 cm.
  • Heat output: 80 W.
  • Weight: 900 g.

Our reviewers unanimously chose this tubular heater as the top product on our list. Our main reason is the fact that it provides a safe and consistent heat to help ensure that your prized harvest does not suffer.

This small greenhouse heater is designed for continuous operation. You also do not need to be an expert to operate it – the setup is super easy. As a bonus, it also uses an intelligent power cycle to conserve energy.

It also features a heat cutoff to prevent this unit from overheating and causing a fire. Got a leaky roof? No need to worry. The SHTTH2 is splash-proof to IPX4 standard.

Pros

  • Small design.
  • Thermostatic control.
  • Only 80 watts.
  • Easy to use.

Cons

  • Multiple units needed for medium space.
  • Only splashproof, not waterproof.

View Price & Details


2. Dimplex ECOT2FT Tubular Heater

The Best Greenhouse Heater With Discreet Brackets

ECOT 2FT Tubular Heater

Product Specifications

  • Size: ‎82.5 x 10 x 6.7 cm.
  • Heat output: 80 W.
  • Weight: 920 g.

The Dimplex ECOT range of thermostatic tubular heaters is an ideal choice of heating for a greenhouse. Much like the previous heater we reviewed, this is suitable for applications that require safe, low-wattage background heating for localised frost protection.

We also had some success with using it as a window demister and a way to prevent damp in cupboards.

This is probably the best greenhouse heater in terms of thermostatic control. The ECOT has six variable heat output settings. This allows you to have much more precise control over the temperature your bell peppers endure. When compared with cheap greenhouse heaters that use paraffin fueled heating elements, accurate temperature control becomes a valuable feature.

Discreet mounting brackets for walls or floors are included, and the cable entry is reversible left or right which offers you the freedom to install this wherever you like. This heater does, however, have to be installed horizontally. As you would expect, it includes a thermal overload cutout for safety and is fully splash-proof (IPX4 rated).

Pros

  • Available in 1ft or 2ft.
  • Precise thermostatic control.
  • Reversible cable entry.

Cons

  • Must be mounted horizontally not vertically.
  • Only splashproof, not waterproof.

View Price & Details


3. Hausen ‎B01BPA15WK

The Best Greenhouse Heater For Sheds

Electric Tubular Heater For Greenhouse

Product Specifications

  • Size: ‎60 cm (length).
  • Heat output: 120 W.
  • Weight: 1.26 kg.

This greenhouse heater comes in four sizes from 1ft to 4ft with respective wattage of 60w to 240w. They are also remarkably affordable, given their quality and recognisable brand name. Hausen has outdone the competition and this greenhouse heater is not only splash-proof but completely IP55 waterproof.

This units safety system is two-tier. It has two levels of thermal protection – the first is when the unit reaches 90°c at which point it lowers its output; if this electric greenhouse heater with a thermostat ever reaches 130°c, then it switches off. This heater comes with a generous 1.5m cable.

Pros

  • Available in 4 sizes from1ft to 4ft.
  • Fully waterproof.
  • Two-tier thermal cutout.

Cons

  • A fixed cable entry point.
  • Confusing manual.

View Price & Details


4. LightHouse 305mm 45W Eco Heat

Best Heater For Fluctuations

best eco greenhouse heater

Product Specifications

  • Size: ‎41.4 x 8.6 x 6.8 cm.
  • Heat output: 45 W.
  • Weight: 739.99 g.

If you live in a region where there are sharp sudden changes in temperature and humidity, then we have good news. This heater is designed to manage such fluctuations to keep your seedlings and plants healthy. Besides providing a stable environment, you can also expect other perks.

You can use the bar to heat soil, it is also safe to mount on walls and the heater is also splash-proof.

Pros

  • Easy to use.
  • Keeps the environment at a stable temperature.
  • Warms soil for seedlings.
  • Wall-mountable.

Cons

  • Not completely waterproof.

View Price & Details


5. Hyco Frost Protector FW500Z

Low Powered Convector Heater

best convection heater

Product Specifications

  • Size: ‎‎28.9 x 27.6 x 11.5 cm.
  • Heat output: 500 W.
  • Weight: 1.11 kg.

This heater is versatile, to say the least. You can either place it on a bench, the floor or mount it on a wall. But if you worry about the effects of frost on your greenhouse plants, then this heater will keep that danger at bay.

The heater is also compact and uses less power than some other models. This makes it both portable and economical. Finally, if you hate complicated controls, then the single control dial is another great bonus.

Pros

  • Easy to use.
  • Portable.
  • Anti-frost.

Cons

  • Not waterproof.

View Price & Details


6. Equip247uk Heater ‎B07MJGBWJX

Best Paraffin Heater

best paraffin heater

Product Specifications

  • Size: ‎‎‎39.5 x 32.1 x 10.2 cm.
  • Heat output: Fueled by paraffin.
  • Weight: 1.93 kg.

We chose this heater for those who might want to add one to their greenhouse – but without using electricity. Indeed, this is a great choice for preppers and as a backup heater for when the power goes out.

Covering greenhouses as big as 4 sq m, you can top it up with 4 litres which will give you a burning time of a whole week.

Pros

  • Needs no electricity.
  • 7-day burning time.

Cons

  • No safety features.

View Price & Details


7. Bosmere “kw Metal Greenhouse Heater

Best Gas Heater

best gas heater

Product Specifications

  • Size: ‎‎‎28.5 x 29 x 21 cm.
  • Heat output: 2000 W.
  • Weight: 4.56 kg.

If you want another non-electrical option for your greenhouse, we also favoured this gas heater. Capable of a decent amount of heat, you can warm up a large nursery with this thing without worrying about the heater becoming too hot. It is fitted with overheat protection to keep things safe – as it should be.

You can also choose between two fan settings, easily move it around (the design is meant to be portable), and enjoy the even heat distribution this heater brings.

Pros

  • Portable and easy to use.
  • Promotes even air flow.
  • Suitable for larger greenhouses.
  • Needs no electricity.

Cons

  • Heaver than other models.

View Price & Details


8. SXFYHXY Electric Hanging Heater

Best Hanging Light

best hanging heater light

Product Specifications

  • Size: 42 x 42 x 24 cm.
  • Heat output: 2500 W.
  • Weight: 3.3 kg.

We also included this lovely lamp for our readers who prefer a more permanent solution. This heater comes with an easy pull cord that activates the heater. Once you do, the heater warms up gently but soon the heat will rapidly spread. We love how it encourages the flow of warm air through a specific space, like a greenhouse.

The quarts tube design also does not emit any odours or chemical fallout, making this a very safe option if you are concerned about byproducts. The light also switches off automatically if the greenhouse tips over.

Pros

  • 2 Adjustable heating modes.
  • Adjustable height.
  • Also suitable for bedrooms, offices, and more.

Cons

  • Not as portable as other models.

View Price & Details


9. CrazyGadget Heater ‎B00Q56H5OW

Best Large Paraffin Heater

Large Paraffin Super Warm Heater Single Burner Warmer By Parasene

Product Specifications

  • Size: 61 x 46 x 46 cm.
  • Heat output: NA.
  • Weight: 20 kg.

This greenhouse heater does not have an electric fan and temperature control is pretty rudimentary, off or on. This little workhorse will keep your plants frost free during the winter, that’s for sure. With a full tank (5 L), you can expect 80 hours of burning time in a greenhouse that is up to 6′ x 6′.

Its threaded chimneys are brass plated which leads to a premium feeling straight out of the box. The burner also features a flame extinguishing device that turns the unit off without a fuss.

Pros

  • Very economical to run.
  • Brass plated chimney.
  • Flame extinguishing device.

Cons

  • No thermal cutout.
  • No digital thermostat.

View Price & Details


10. Tooltime 2 Ft Heater ‎B00GZ24JQI

Best Basic Heater

2ft Portable Electric Tubular Greenhouse Heater + Cable, Plug, Clips & Fixings By Tooltime

Product Specifications

  • Size: Unspecified.
  • Heat output: 80 W.
  • Weight: 1.35 kg.

his 2ft tube heater provides a lot of warmth despite its low wattage of 80w. The end result is more than enough to heat your greenhouse and maintain a safe temperature for your plants. Wall brackets are supplied but you can also use the heater as a floor-mounted device.

It is IP55 rated and is built of stainless steel with a white enamel finish. It may look plain, and that is because, well it is. It does the job and nothing more. If nothing else it’s an honest little device that may be the most reliable out of all of the greenhouse heaters we reviewed due to its lack of complexity.

Pros

  • Very economical to run.
  • No gas or paraffin required.
  • Simple design.

Cons

  • No thermal cutout.
  • No digital thermostat.
  • Can only be mounted horizontally.

View Price & Details


Buying Guide


With such a plethora of options available, it can seem daunting to pick the best heater for your greenhouse. Our guide has all the tips you need to find the best heater for your needs!

Temperature

The first thing to consider is what temperature you need to maintain. This will vary drastically depending on the crop or plants you are growing. Some plants require a cosy environment to thrive; others are happy if you just keep the frost at bay. Deciding on your required temperature will guide you in the kind of power rating you require.

Power Rating

The second factor is the power rating you go for. It can be tempting to go for a low wattage unit to save money, but this can be a false economy. Depending on your climate, it may cost less money, in the long run, to use a high wattage heater for a short time; as opposed to having a low wattage unit continually on.

Fuel Type

You will also have to make a decision on the fuel type you want to use. Electric heaters which come in either a tube form or as an electric fan can get expensive to run. If you have multiple units or you need to constantly raise the temperature for your plants. Paraffin or Propane heaters can be cheaper to run, but if you run out, it’s not like you can just replace a fuse or top up your account.

User-Friendly Design

Ease of use is probably the final consideration and actually one of the most important for less mobile users. Paraffin and propane heaters can be efficient and quickly raise the temperature for your plants. This comes at the cost of more labour involved in refilling them and monitoring them closely so as to prevent a fire hazard.

Most electric units come with a built-in thermostatic control which allows you to set the desired temperature range. This means your greenhouse heater will turn on and off automatically without the need for you to worry about whether that fuel will last. An electric unit will also more than likely feature a thermal cutout which will help to prevent a fire hazard if the unit falls off the wall for example and onto something flammable.


FAQ


Q: What type of heater is best for a greenhouse?

A: The best heaters for greenhouses are those that have some type of temperature control. This usually comes in the form of thermostatic control.

Q: What is the most efficient way to heat a greenhouse?

A: Insulate the walls and floor of your greenhouse as much as possible. Electric heaters for greenhouses are the most efficient system generally. This is because they use a digital thermostat and an efficient heating element.

Q: Are greenhouse heaters expensive to run?

A: The average electric fan heater uses around 2500w. This means that your average greenhouse heater will cost 2.9 pence per hour (based on average UK kw/h unit price 2022).

Q: How to heat a greenhouse without electricity?

A: Depending on the temperature you need to maintain, there is a number of low and high tech alternatives. You can passively insulate your greenhouse with something as simple as bubble wrap if money is a factor. You can also use paraffin heaters or even solar panels to power an electric fan heater.


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About the Author Harry Thompson

Involved in home renovations throughout his life, Harry is an expert in everything to do with home and garden DIY. In his spare time, he enjoys cooking and tending to his garden.