Two greenhouses with winter protection

 

Best Small Greenhouse Heaters

 

Why Heat Your Greenhouse?

Keeping your greenhouse frost free, suitably heated in a cost effective way as well as ventilated whilst retaining light levels is key to protecting your plants through the winter.

Using Horticultural bubble wrap on the greenhouse is a tried and tested method. Buy one that has large bubbles as this provides most insulation and light.

During prolonged cold periods cover your plants with Horticultural fleece as well. This will give added layers of insulation and will keep the costs of running heaters down.

Don’t over heat the greenhouse, you can keep your greenhouse frost free at a temperature of 3degrees, this is sufficient for most plants.

A greenhouse heater is an essential part of indoor, winter plant care, but what type of heaters are best for a greenhouse?

This article highlights options for best small greenhouse heaters available in electric or gas, in a reasonable price range to suit most budgets, in the following categories:

  • Electric Greenhouse Heaters
  • Propane Greenhouse Heaters

SHOP NOW When you see one that you like click on the links or images to see how to buy.

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Electric Greenhouse Heaters

Please Note that when you use any electrical items in your greenhouse, including heaters, grow lights, fans and lighting you MUST have an earth safety trip switch as part of the fuse board linking the mains electric to your greenhouse.

 

Simplicity Heater Set

The Best Place to Buy: Amazon

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Product Details

  • 2kW fan heater with digital thermometer
  • Strong metal powder coated casing
  • Stainless steel heating element
  • Good quality fan
  • 23 x 20 x 32cm
  • 1.3 meter cable
  • IPX4 rated

The Simplicity heater is sturdy and well-built. The fan circulates air around the greenhouse to keep an even temperature.

The fan and electric automatically switche off when the desired temperature is reached.

This model can be used as a fan only in summer or set the heater to 1kW or 2kW depending on the size of the greenhouse.

Compact, easy to use and heater settings are reliable, use in conjunction with the included thermometer.

Suitable for heating a 8×12 greenhouse or maybe a slightly larger one if using on frost free setting.

Pros

  • Compact
  • Well built
  • Easy to use
  • 1kW or 2kW
  • IPX4 Rating
  • Digital thermometer included
  • Excellent price
  • Suitable for small to medium greenhouse up to 8×12

Cons

  • Larger greenhouses will require a more substantial heater with more output.
  • Needs a safe electric supply to the greenhouse

 

Waldbeck Strato Fan Heater – Greenhouse Heater

The Best Place to Buy: Amazon

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Product Details

  • Sturdy, quality construction
  • Stainless steel casing
  • Carry handle
  • Support Feet
  • IPX4 Rating
  • Splash Proof
  • Inbuilt Thermostat
  • 2 heat control modes
  • 2kW output
  • 34 x 26 x 23 cm

The Waldbeck Strato Fan Heater is robust and well-made, it is an ideal choice for your greenhouse. It provides good air circulation to give an even temperature with up to 2kW output.

It is efficient and easy to use. Once the desired heat is reached it will automatically switch off. It will switch back on if the temperature drops therefore providing a good control of consistent heat and air.

Pros

  • Sturdy construction
  • Splash proof
  • Integrated thermostat
  • Easy to use
  • Efficient
  • 2 heat control modes

Cons

  • Needs a safe electric supply to the greenhouse/workshop

 

EcoHeater Slimline Greenhouse Heater

The Best Place to Buy: Amazon

Star Rating ⭐️⭐️⭐️⭐️and half

Product Details

  • 190 watt
  • Keeps a greenhouse frost free
  • Slimline 1500mm
  • Economical
  • Efficient
  • In built thermostat control
  • Floor or Wall mounted

The EcoHeater Slimline is easy to install, it can be floor or wall mounted using the fittings and feet supplied.

It provides sufficient heat to keep a greenhouse frost free.

Economical to run.

Pros

  • Economical
  • Efficient
  • Built in Thermostat Control
  • Good Price
  • Takes up very little room

Cons

  • Suitable for a small greenhouse only
  • Needs a safe electric supply to the greenhouse

 

Propane/Gas Greenhouse Heaters

A propane/gas heater is more convenient in terms of not having any cables to run. They are more mobile too for the same reason. Be sure to buy enough propane and spare wicks to last through the period that you wish to be heating your greenhouse. Ensure that you have sufficient ventilation.

 

Biogreen WM-P5 Warmax Power5 Paraffin Heater

The Best Place to Buy: Amazon

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Product Details

  • 40% longer burn time
  • Traditional design
  • 4 Burners
  • Snuffers
  • Robust and well-made

The Biogreen Parrafin Heater is a traditional paraffin Greenhouse Heater and will provide enough heat to keep the greenhouse frost free.

You have to put it together yourself but there are instructions provided.

As there are four burners you can have variable heat, it depends on the size of your greenhouse as to how much output you require.

It is easy to use and you can purchase replacement wicks and the paraffin required together as one package.

The flames are covered by a flue with a vent hole making this burner safe to use as possible.

Please note that any heater with naked flames should be kept a suitably safe distance from any combustible materials.

Pros

  • Good price
  • Easy to use
  • Variable heat from four burners
  • Economical

Cons

  • You have to buy replacement wicks and gas

 

Eden Gas Greenhouse Heater

The Best Place to Buy: Amazon

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Product Details

  • Sturdy Robust Construction
  • 2kW Output
  • Ignition
  • Safety Valve
  • Thermostat Control
  • 48 x 30 x 13

The Eden Gas Greenhouse Heater is robust and well-built. It is perfectly suitable for keeping the temperature of your greenhouse at a constant frost free level.

A 19kg propane tank should last approximately 10 days on a low setting, keeping the temperature to about 12 degrees in an average 6 x 8 greenhouse. The Eden heater will use considerably more gas should you wish to keep the greenhouse a lot warmer. But on a frost free heat it is economical and efficient.

Pros

  • Easy to use
  • Efficient
  • Safety Valve
  • Thermostat Control

Cons

  • Can be expensive on gas
  • Do not use in Pollytunnels
  • Quite expensive to buy – plus gas tanks

 

I have given you several options here for greenhouse heaters, I hope that you have found the information useful and that it will help you to decide which heater you need.

Keep your plants warm and give them optimum growing conditions this winter and get ahead of the game by growing garden ready plants earlier than usual.

 

Thank you for reading and please do share with friends and family and social media.

Any questions can be added to the comments box below and I will reply as soon as I can.

Happy gardening.

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