14 Best Greenhouse Heaters: 2024 Guide

In order to have a successful greenhouse, you need to take care of the plants inside. One way that you can do this is by finding the best greenhouse heater that will keep your plants healthy and happy. 

There are many different types of greenhouses, so there is no one-size-fits-all solution when it comes to choosing a heater for your needs. In this blog post, we will review the best greenhouse heaters so you can find one for your individual situation!

Our Top Picks of the Best Greenhouse Heaters:

1 | Dr Heater Greenhouse 1500 W Infrared Heater

The Dr. Heater Greenhouse Heater is a 1500 watt heater (also comes in 3000 W) that can be used in greenhouses up to 150 square feet for heating purposes. It is lightweight and portable, making it perfect for seasonal use. The Dr. Heater is also equipped with features such as: a temperature sensor so your plants don’t overheat and an adjustable thermostat, plus more!

Features:

Specifically designed for greenhouse heating.

Not only does this heater come in 1500 W and 3000 W, but it also designed specifically for greenhouse heating. The structure of this heater has an IP4X design, which means that it is protected from anything bigger than 1 mm. When you’re watering your plants, there’s no need to worry about water splashing on the heater, because it’s designed to stay protected.

Durable design

Not only is the IP4X structure a great perk to this heater, but the unit is completely enclosed, with a long-lasting motor that the company stands behind. No need to worry if it will survive each season, because it has been built to be sturdy.

Efficient Running Temperature

The Dr. Heater Greenhouse Heater is a gauge to ensure you have the exact temperature you want in your greenhouse. It also has over-heat safeguarding and an adjustable thermostat.

PROS:

Sturdy design that is meant for greenhouses.

Radiant style heater, so it has a uniform distribution of heat.

Small and lightweight, at only 13 inches high and 12 pounds.

CONS:

X Not intended for large greenhouses.

2 | BioGreen Pamla Electric Greenhouse Heater 2.0

The BioGreen Palma Greenhouse Heater 2.0 is an advanced model that operates with up to 92% efficiency for maximum savings in energy costs, while still providing outstanding performance and reliability. This greenhouse heater will heat up to 120 square feet and also comes equipped with an insulated fan housing for quieter operation, dual thermostat sensors for enhanced temperature control, and a pre-wired plug for easy installation. With so many features to offer at an affordable price point, the Biogreen Greenhouse Heater 2.0 has become the go-to choice among amateur and professional growers around the world.

Features:

Spraywater Proof.

You don’t have to worry about watering your plants around this heater. The Biogreen Palma heater is designed with IPX4, which means it is resitant to water from any direction.

Heating or ventilation choice.

If you want a unit that you also use in your greenhouse in warmer weather, then look no further. The BioGreen Palma Electric Greenhouse Heater 2.0 has heating options, as well as a ventilation option for when it’s warm and your plants need to breathe.

Digital thermostatic control for ambiant temperature.

This greenhouse heater is one of few that reads ambiant temperature in your greenhouse. The external thermostat is digital and reads the overall temperature in the greenhouse, not just the area that’s immediately next to the unit.

PROS:

Safe from water overspray.

Versatile with heating or ventilation.

More efficient with external thermostatic control.

CONS:

X .

3| Mr. Heater F232000 MH9BX Buddy Propane Radiant Heater

The Mr. Heater F232000 MH9BX Buddy is a portable propane, radiant heater that can heat up to a 22five square foot greenhouse, with a maximum run time of three hours on full blast, or hours at minimum level. With the purchase of a hose and a filter, you can switch from a 1 pound, portable propane tank to a 20 pound, remote gas supply. The auto shut-off feature will give you peace of mind. It shuts off when tipped over, if the pilot light goes out, or if it detects low oxygen levels.

Features:

Versatile unit.

The versatility of this heater makes it a top contender in the world of greenhouse heaters. It can be portable or you can use its swivel regulator to adapt to a bigger tank, allowing for more run time.

The handle of the unit will fold down to take up less space, which is a must when you have a limited area in your greenhouse.

Easy to use control knobs.

The Buddy heater can be easily turned on with its single control start knob. It also features a simple high-low knob for you to choose from, according to your temperature needs.

Long running time.

At its lowest setting, the Buddy heater can run for about six hours, with a 1 pound cylinder. That can be increased even more when you connect it to a larger propane tank.

PROS:

Tip-over safety shut off.

4,000 or 9,000 BTU per hour.

Can be adapted to a large propane cylinder.

CONS:

X Does not have temperature control.

4| Aikoper Portable Ceramic Space Heater

The Aikoper Electric Ceramic Heater is a space-saving, powerful heater for your greenhouse. It has 1500 watts of heating power and heats up to 250 square feet in minutes. Its sleek design saves you valuable floor space while its fan mode cools the air when needed. This portable heater features an adjustable thermostat, as well as an advanced overheat protection sensor.

Features:

Small size for space saving and portability.

The size of this unit makes it an excellent heater for small greenhouses. It won’t take up much space and you can easily move it when needed, as it only weighs 3 pounds. Its small size also makes storing it in the off season very easy.

4 temperature settings.

The Aikoper heater has 4 temperature settings, including low, medium and high, as well as a fan. No matter what the season is, you can use this unit. Keep your plants warm in the winter, or keep air flowing in the summertime.

Adjustable thermostat.

The adjustable thermostat on the Aikoper heater allows for you to set your desired temperature and leave. The unit will automatically heat when the temperature drops. This ensures your plants don’t overheat.

PROS:

Compact size for easy moving.

Adjustable thermostat.

Can be used as a fan in the summertime.

CONS:

X Needs an electrical outlet to run.

5| Pelonis Ceramic Heater

Pelonis has always been known for their quality and affordability; this product is no exception. The Pelonis PTH15A4BGB Space Heater features a large oscillating head, tip-over switch and overheat protection for safety to make sure your greenhouse stays warm and safe. It comes with a remote control with an 8 hour timer as well as a programmable thermostat which will help to regulate the temperature of your greenhouse. It also has eco mode which reduces energy consumption by up to 21%!

Features:

Digital thermostat.

One of the best features of this unit is how easily you can program the heater using the digital control panel. You can easily set your mode, timer and temperature using the top buttons.

Remote control.

If it’s too cold to go outside and turn on your heater, you can always use the remote control that comes with it. It works from up to 20 feet away and controls all settings.

ECO Mode.

One thing that might concern you about an electrical heater is the increase in your electric bill. Thankfully, this heater comes with an ECO mode that helps save energy based on the temperature in your greenhouse.

PROS:

Comes with remote control.

Programmable thermostat.

Oscillates for even distribution of heat.

CONS:

X Large in size.

6| Briza Infrared Electric Heater

The Briza Infrared Electric Heater is in a class of its own, with an advanced radiant heating system that creates a comfortable, dry, and healthy space for your plants. The Briza heater is also equipped with a timer, 3 heat levels and a thermostat, and they can all be adjusted with the remote control. If you’re looking for versatility, the Briza heater also comes with a tripod, or it can be wall/ceiling mounted.

Features:

Timer.

You don’t have to be concerned about turning off your heater. The Briza heater has a timer that can be set for 1-9 hours. You can set it for the coldest parts of the day and it will automatically turn off when the time is up.

Remote control.

The Briza heater comes with a remote control that can control the timer, heat levels, thermostat and the on/off function.

Dual use.

Something that sets this heater apart from the rest is that it is versatile for mounting or staying on the ground. It comes with mounting hardware for your wall or ceiling, or it can be placed on the adjustable tripod stand. Whatever suits you best!

PROS:

3 heat settings—900 W, 1200 W, 1500 W.

Can be mounted or put on tripod.

Timer can be set for 1-9 hours.

CONS:

X Higher price point.

7| Honeywell 360 Degree Surround Heater

While Honeywell has been making heating products for over 100 years, they continue to find new ways to improve their technology. Honeywell’s 360 Degree Surround Heater with Fan Forced Technology is one of the most advanced space heaters on the market today. This heater offers a surround output that can reach up to 15 feet in every direction and utilizes fan forced technology for even distribution of warm air. With two heat settings, this heater is perfect for keeping your plants warm this winter.

Features:

360 degree heat output.

As its name suggests, the Honeywell 360 Degree Surround Heater puts out heat all around the unit. Most heaters put out heat directly in front, but not this heater. With its fan-forced technology and heat all around the unit, heat distribution will stay even for your entire greenhouse.

Reliable safety features.

Aside from its great heat output, this heater also has several safety features, including a 360-degree tip over switch, double overheat protection (if it gets to hot or if something is too close to the unit, it turns off), an auto-off timer option and a handle that stays cool for when you need to move your unit.

1500 watts of energy.

This heater may be small, but with 1500 Watts of energy, the heat output is excellent. You also don’t have to worry about your electricity bill, because you aren’t forgoing high heat for big bucks.

PROS:

Great for small spaces.

Even, 360 degree heat distribution.

Programmable thermostat.

CONS:

X Noisy— but only your plants will care.

8| Kopbeau Radiator Electric Heater

The KopBeau 1500W Oil Filled Radiator Electric Heater is another great option for your greenhouse in the winter. It has a digital thermostat, 24 hour timer and remote control making it easy to use in any room of your home. This unit comes with 3 heating options: 600w900w, 1500w. It also has ECO mode, to help keep energy costs minimal. Not only does this heater have great features, but it looks great also!

Features:

Caster wheels.

This Kopbeau heater comes with caster wheels that make moving it around your greenhouse a cinch. The wheels sit several inches above the base, so it is safe to put on any type of flooring.

Automatic on and off when desired temperature is needed/reached .

The thermostat feature on this heater is a huge plus when it comes to heating your greenhouse. This will prevent your greenhouse from getting too hot or too cold. It’s perfect for keeping seedlings healthy and for germinating seeds when it’s cold outside.

24 hour timer.

The timer on this unit allows for a delay start. This is really useful for when you need the heater to run and you don’t want to be out in the frigid cold.

PROS:

Easily moveable.

Thermostat feature.

Different heat settings.

CONS:

X Remote control has to be used close to unit.

9| Dr Heater DR966 Hard Wired Commercial Heater

Dr. Heater DR966 is a commercial grade heater that can be hardwired into any 240V outlet in your greenhouse. It features a 3000 watt heating capacity and 6000 watt cooling capacity, as well as an electrically heated ceramic element with a built-in thermostat to provide even heat distribution throughout your space. This unit also has safety features such as an automatic overheat protection, which shuts off the unit if it reaches its maximum operating temperature. If you’re looking for a commercial grade heater, this is it!

Features:

Wall or ceiling mount.

This commercial grade heater comes with brackets for a wall or ceiling mount. You can save floor space with this feature, so you can make room for more plants.

8 inch fan.

The fan on this heater allows for maximum air flow and equal heat distribution. Using the 5-way adjustable louvers, you can aim the heat in whatever direction makes the most sense for your greenhouse.

Hard wired.

Having a hard wired heater means that you aren’t having to worry about cords all over the ground. The Dr. Heater DR966 can be hard wired into your greenhouse by using a 240V outlet. Just make sure your greenhouse can house a hard wired heater and has the necessary electrical requirements.

PROS:

Saves on space by being mounted.

Louvers for aimed heat.

2 heat settings– high and low.

CONS:

X Unit doesn’t come with a power cord.

10| Comfort Zone CZ230ER Hard Wired Heater

The Comfort Zone CZ230ER Digital Fan-Forced Ceiling Mount Heater is easy to install and use. It is excellent for large-scale greenhouses that need a superior heater. This heater has a remote control with full function buttons, as well as a 12 hour timer. It also has 3 smart settings so you can choose the perfect temperature for your greenhouse. This Comfort Zone fan-forced heater emits heat that covers up to 800 square feet and heats spaces quickly. If you’re looking for an affordable ceiling mount heater that’s easy to use, this heater is just what you need.

Features:

Ceiling mount.

This heater comes with a mounting bracket for the unit to be mounted on the ceiling. Using one 3/8″x2″ lag bolt through center mounting bracket hole will sufficiently mount the unit. The ability to be ceiling mounted means more space on the floor, and no tripping over a space heater on the ground!

Heavy gauge steel construction.

When searching for the perfect greenhouse heater, you have to make sure it will withstand harsh temperatures. The Comfort Zone CZ230ER is made of steel and with a completely enclosed motor, it can withstand climate changes, as well as dust and dirt that you often find in a greenhouse.

Digital controls with remote.

The digital controls on this heater are key to making sure your greenhouse stays comfortable for your plants. The unit has a 12 hour timer, so you can run the heat for a particular amount of time, like overnight, when it’s the coldest. The remote control that comes with the heater is also convenient for changing the temperature and turning the heater on and off.

PROS:

Sturdy design for long-lasting use.

Remote control so you can control the heater from a distance.

Louvers to aim the heat where you want it.

CONS:

X Internal thermostat can have issues.

11| Givebest Ceramic Heater

The Givebest Portable Electric Space Heater features a thermostat so you can adjust the temperature as you need for your greenhouse. You can choose between two heat levels, 1500W or 750W, and one cool air fan. It will heat up to 200 square feet in minutes and has a six foot long electric cord to easily plug into a nearby outlet. The built-in fan circulates air to evenly distribute heat throughout the greenhouse and multiple safety protections ensure that this heater will last for years.

Features:

Two heat levels and a cool air fan.

Not only with the Givebest Electric Space Heater suit your heating needs in the winter, but you can also use it to vent your greenhouse in the summers. That means no storing it for the summer, and you really get your money’s worth!

Several safety features.

This heater is not only made with flame retardant material, but it also has a tip over turn off feature. When the unit stands back up, it comes back on.

The heater also has an automatic turn-off feature when the unit overheats. This ensures safety at all times.

Thermostat.

You definitely want a stable temperature in your greenhouse, and this heater will ensure that happens. The thermostat will cycle on and off as your greenhouse hits the desired temperature.

PROS:

1 year warranty.

Thermostat for stable temperature.

Small and portable.

CONS:

X Makes a lot of noise.

12| Pro Breeze Mini Ceramic Space Heater

The Pro Breeze Mini Ceramic Heater operates on 3 different modes: 750W (Low) and 1500W (High) power modes as well as a gentle fan-only mode, so it will fit your plants’ needs no matter the season. It also includes a handy adjustable thermostat so you can set the temperature as needed. Pro Breeze features user-friendly controls, and a built-in handle to make it easy to transport around your greenhouse or to store away when not needed. Safety features include automatic turn-off if the unit falls over and overheat protection, so you can rest assured you and your greenhouse are safe. The large intake allows for better air circulation, which is important when considering a greenhouse heater.

Features

Two heat levels and a cool air fan.

In the winter, this heater can be set on either low or high to keep your greenhouse warm and cozy for your plants. But you don’t have to put it away when the warm weather raises your greenhouse temperature in the summers. You can use the fan-only mode to ventilate when it’s warm outside, so it’s a win-win.

User-friendly controls.

The two simple knobs on the top of the heater are easy to use. You can simply switch the knobs between heat modes and set the thermostat to your desired temperature. No fuss.

Small and portable.

The Pro Breeze heater is very small at only 6.5” x 5” x 9”, but still puts out a lot of heat. Its small size makes it very portable, so you can move it wherever you need it, whenever you need to.

PROS:

Small size for portability.

Large intake fan for better airflow.

Simple knobs are user-friendly.

CONS:

X Front grill gets hot.

13| Dimplex DCH4831L Electric Heater

The Dimplex #DCH4831L 4800-Watt Portable Construction Heater is a powerful and portable heater that can provide you with instant heat. It’s lightweight and easy to transport. The heater has lights to indicate that the unit is running and comes with a six-foot cord that stores around the handle, to make it an even more convenient heater.

Features

Built for optimal output.

The propellor-type fan spreads heat quickly and evenly and the stainless steel tubular element ensures optimal heat.

Long cord with storage.

One of the nicest things about this unit is that it has a six-foot-long cord, so you can sometimes avoid needing an extension cord to your greenhouse. The cord can be stored at the top of the unit, around the handle. This feature makes for nice storage.

Overheat protection.

The Dimplex heater won’t overheat, thanks to its overheat protection feature. If the heater gets too hot, it will turn off, which protects your greenhouse and your heating unit.

PROS:

Heavy duty structure.

Long cord.

Great heat output.

CONS:

X Needs 240 V socket.

14| Isiler Ceramic Space Heater

If you’re looking for a reliable space heater that won’t take up too much space, ISILER a great choice. ISILER’s 1500W Portable Indoor Heater is compact and designed to heat an average size greenhouse quickly (it heats up to 108 square feet). The ISILER Space Heater has a thermostat so you can set it according to your needs, as well as safety features like flame retardant material and tip-over protection, so you can have peace of mind.

Features

Large air outlet.

The Isiler portable heater has a large air outlet that improves its heat output. No space is wasted, with the controls on the backside of the unit, the Isiler has more space for its fan.

Compact and portable.

The Isiler heater is 6 in x 6.7 in x 7 in and weighs 38.8 ounces. Its small size allows for you to move it wherever you need it in your greenhouse. Don’t let is size fool you…

Excellent safety features.

You don’t have to worry about your greenhouse when it comes to using this little heater. The Isiler heater has a thermostat, so it will turn off when your greenhouse reaches the desired temperature.

It is also made of flame retardant material, has a self-regulating element, and overheat protection. If it gets knocked over, it will turn off, which is another must-have feature.

PROS:

Large fan air outlet.

Several safety features.

Small and portable.

CONS:

X Controls on the back can be difficult to access.

What to consider when deciding on your greenhouse heater: 

If you are looking for a heater for your greenhouse, there are many options available. So knowing a few things about your greenhouse will help you choose the best fit.

How cold does it get where you live?

The climate that you live in is going to be the main factor in determining which heater you need in your greenhouse. If it freezes for an extended period of time where you live, you will definitely want a heater that can keep up with the cold.

If you live in a warmer climate, you may want to get a heater that also has the cool fan option so you can use it all year round and ventilate your greenhouse in the summer.

best greenhouse heater snowy greenhouse

What is the size of your greenhouse?

Take into consideration how many square feet your greenhouse has. If it’s on the smaller side, you can get away with a room-sized heater. As your square footage goes up, so does your need for a heater with more output.

Are you germinating seeds, or warming established plants?

Depending on the stages of your plants, you will need different heating in your greenhouse. Germinating seeds calls for about 70-80 degrees Fahrenheit, though some plants require less or more heat.

For example, beans need warm soil and temperatures in order to grow successfully after germinating, while tomatoes can handle cooler temperatures.

For more established plants, keeping the greenhouse at 50 degrees Fahrenheit should be fine.

Make sure to research your specific plants and their heating needs.

best greenhouse heater in greenhouse

What other available heat options do you have?

If you keep reading, you’ll find that there are several ways to heat a greenhouse, besides a space heater. However, some of the options aren’t always feasible or affordable.

If you are able to have a main heat source, then the space heater can offer additional support, and you don’t need one very high-powered.

However, if it’s your main source of heat, you want to make sure it has enough output to keep your plants healthy.

Different Types of Heaters for Your Greenhouse

There are several different types of heaters you can consider for your greenhouse. The first thing you will need to know is whether or not the heaters use natural gas, propane (LP), electric power, or solar power. 

There is no “best” option; they all have their pros and cons. For example, natural gas costs less than electricity but can be more to keep up with. 

ELECTRIC HEATER

Electric heaters are your typical plug-in units, but there are several different types. These are ideal if you want to make sure that your greenhouse is warm all day long, but they can be costly. The electricity used by these types of heaters works well in small areas or when supplemental heating isn’t needed. 

best greenhouse heater electric

INFRARED OR RADIANT HEATER

Infrared and radiant heaters are one in the same. These types of heaters are more efficient than traditional ones because they emit energy in the form of light waves rather than long-wave radiation. Infrared and radiant heaters also work well in small spaces because the emitted energy heats objects rather than air which means that there is no need for a fan to circulate warm air throughout the room.

ELECTRIC OIL HEATER

One electric option is the oil heater. These electric devices use electric heating coils and oil, so they do not produce any fumes or odors like gas-powered heaters. Oil is heated in the electric space heater until it reaches around 400 degrees Fahrenheit, which turns into radiant heat that is distributed throughout your greenhouse. They can provide plenty of warmth, but be sure to keep an eye on your budget and energy costs.

electric oil heater best greenhouse

CONVECTION HEATER

These rely on air currents (natural or forced) in order to generate warmth and distribute it throughout the greenhouse. If you have a smaller space, this is probably your best option as it provides even heat distribution and works quickly to make for a comfortable environment. 

FLUORESCENT GROW LIGHT

If you are growing plants or just want to provide supplemental light for your greenhouse, fluorescent lighting is the best option. These lights use less energy than other options and work quickly in order to get your desired effect. 

best greenhouse heater grow lights

PROPANE HEATER

When all else fails, propane heaters can be a great choice if you need to keep your greenhouse warm for an extended period of time. They are easy to use and provide plenty of warmth even in the coldest climates. So, if you live in a colder climate with very long winters this could be the best option for you! 

best greenhouse propane heater

What Makes a Good Space Heater?

SAFETY FEATURES

Heating your greenhouse is one of the most important things you can do to make sure it stays warm and cozy. But did you know that not all heaters are created equally? Some emit harmful emissions like carbon monoxide, such as propane heaters. It’s important to make sure your heater comes with standard safety features.

An automatic shutoff switch is important for overheating. This will not only spare your plants from extreme heat, but will also protect your heater from getting damaged.

EFFICIENCY

If you live in a colder climate, your heater should be able to keep the greenhouse at least 55 degrees Fahrenheit. Your target temperature will also depend on whether or not you are trying to germinate seeds in your greenhouse.

In order to maintain the temperature in your greenhouse, look for a heater that has an adjustable or digital thermostat.

STURDY STRUCTURE

When searching for your greenhouse heater, make sure to pay attention to the structure of the unit. Is it built for ever-changing temperatures? Will it last you several years?

Pay attention to the type of material. Both plastic and metal can make a good heater, just make sure it’s all heat safe.

Additional Ways to Keep Heat in Your Greenhouse

Aside from a heater, there are other ways you can keep your plants warm.

Insulation and ventilation

You don’t want to create a greenhouse that is too hot because it could damage your plants, but you do want warmth to be kept inside the greenhouse when the weather is cold. Make sure that your insulated greenhouse has plenty of ventilation for warmer months.

Heating a Greenhouse with Lights

Plants need light to grow, but did you know that they absorb infrared (heat) rays? If you provide artificial heat by using high-intensity lights for 12 hours per day in the winter, it will help keep your plants warm. You can also get greenhouses with built-in lights.

Heat Mats

If you have a nearby electrical outlet or can run electricity to your greenhouse, you can put heat mats under your plants. This works well for germinating seeds, but will also work to keep your plants from freezing in the winter. This is best used as a supplemental heating source.

Radiant Heating

Radiant heating can also keep your greenhouse warm in the winter. You can have piping installed in the foundation of your greenhouse, or you can place tubing in the soil. They run on electricity or there are water-based systems.

Radiant heating sends warmth directly into the surfaces that it’s installed against, like soil or concrete. This type of heating is one-directional so it might not be good if you want even heat distribution. These work by transferring heat through infrared waves in order to create warmth within an enclosed area.

Heat Pumps

If you are looking for something that will heat your greenhouse in the winter and cool it during summer, consider using a heat pump. It works by exchanging hot air inside of your building to cooler air outside – this is called thermal exchange. These appliances can be expensive but they use less energy than other types of heating.

Wood Stove

These appliances look similar to fireplaces, but they don’t require an exterior chimney. They work by burning wood or pellets inside of the building itself and releasing hot air into your greenhouse. You can install a stove that burns pellets made from compressed sawdust if you want to be environmentally friendly!

Final Thoughts on the Best Greenhouse Heater

No matter what type of greenhouse heater you choose, make sure you have thoroughly researched and read about your heater.

Safety trumps everything, so make sure the safety features are top-notch, so your greenhouse and your home are safe.

The best greenhouse heater will be the one that is durable and heats your entire greenhouse throughout the winter.

Your plants will be thankful you invested in a heater!

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