Best Heaters for Cannabis Grow Room & Grow Tent

Cannabis industry is an area that has experienced massive growth in the recent past and continues to do so. The booming industry is not actually one industry but an industry involving several service industries such as the growers of cannabis.


Growing cannabis is not an easy job. A cannabis grower has to look out for many elements that affect the cannabis like humidity and temperature. When it comes to humidity, a good humidifier for grow tent will do the trick.  It is very important that the temperature of the grow room is suitable for the growth of the cannabis. Here, the rule of thumb is that if the temperature is comfortable for you then it is comfortable for your plants. Therefore, in case you have a grow room or you are planning to start one, you need to consider getting a heater if you do not have one already.

Why do you need a heater for your marijuana grow room?

Marijuana plants thrive in temperatures of 20 to 30 degree Celsius. This means that if the temperature goes down, then the marijuana is going to grow slowly resulting to low yields.

However, if the temperature is low for a long period, then the effects are going to be much worse than just low yields. It is for this reason that you need to have a grow room heater that is going to regulate the temperature of the cannabis grow room and ensure that the temperature in the grow room is conducive for the growth of the cannabis.

Besides the low yields, low temperatures can also result into the growth of mold on the cannabis thereby rendering the cannabis useless. The following are some of the best heaters for cannabis grow room

Best Equipment About Climate Control For Grow Cannabis Indoor 09- 2022

10 Best Grow Room Heaters Reviews

Lasko 5409 Ceramic Portable Space Heater with Adjustable Thermostat

-$5.00 SALE OFF Lasko Ceramic Portable Space Heater with Adjustable Thermostat-Features Widespread Oscillation to Distribute Warm Air, Silver 5409

One of the great features of this heater made by Lasko is the built-in handle and the three quite settings. The handle makes it easy for you to carry the heater from one point to another whether you are keeping it on the floor or on a tabletop.

With 1500 watts that provide comforting warmth, the heater will ensure that your weed stays warm even when the temperatures are cool. Controlling the heater is also easy as it features manual controls that are easy to use. In addition, the fan-powered delivery ensures that heater covers a 300 Sq. ft. area. It also has an adjustable thermostat and widespread oscillation.

Even though the heater is small measuring 8.34” x 6.55” x 11.66” in terms of length, width and height respectively, it works very well.  With this heater, you will not have to worry about leaving it on for too long because it has an automatic overheat protection feature that enables the heater to automatically turn off if left running for too long. Also, no worries of suffering from burn injuries when your bare skin comes into contact with the heater because the heater’ exterior stays cool when the heater is on.

However, be sure to place it on a stable tabletop or surface where there is no fall risk to avoid accidents. This is because the heater continues to run even when it has fallen down.

Stiebel Eltron 074058 120-Volt 1500-Watts

-$31.70 SALE OFF Stiebel Eltron 074058 120-Volt 1500-Watts Heater

This heater features an amazing surface mount design and a quality construction with plastic and steel to ensure your cannabis grows in the best environment.

Made in Germany by Stiebel Eltron, a trusted brand, the heater also features a quite operation and is equipped with a built-in thermostat for an easy time when adjusting the heat. Another amazing feature of the heater is the frost protection setting which ensures that the temperature remain above freezing points even with the lowest thermostat setting.

The great design of this heater means that the heater is not only good-looking but is also works nicely in maintaining a warm temperature for the cannabis grow room.

Vornado MVH Whole Room Vortex Heater, Black

Made by Vornado, this heater applies vortex technology to fully circulate heat evenly throughout the marijuana grow room. Besides the Vortex technology, another great feature of the heater is the tip-over protection and the automatic shut-off feature, which makes it easy for you to use the heater without having to worry about any accidents caused by the falling of the heater.

This is because the two safety features ensures that the heater shuts off when it falls or tips over. In addition to the safety features, the heater has three heat settings of 1500W, 1125W and 750W making it easy for you to monitor or control your energy consumption.

The heater has a nice size, it is light and is also good looking. However, its ability to heat the room depends on the size of the room and whether the room can be closed in order to keep the warmer air in.

DeLonghi EW7707CM Safe Heat 1500W

De'Longhi Comfort Temp Full Room Radiant Thermostat, 3 Heat Settings, Energy Saving, Safety Features, Nice for Home with Pets/Kids, 27' x 6.5' x 15.5', Light Gray

With this heater, you can safely heat the cannabis grow room without having to worry about the heater overheating. This is because this heater features a thermal shut-off that shuts of immediately the heater begins to overheat.

Besides the guaranteed safety, this heater also provides great comfort because it features multiple heat settings and an adjustable thermostat. Even though the heater weighs 23.6 pounds, it features wheels that require no assembly making it very portable.

With this heater, you get to save money you would have spent paying for the high electricity bills. To save energy, simply press the ComforTemp button. The heater also features a maintenance free system, which means that you do not have to ever worry about refilling the oil in the heater because the oil system is sealed permanently.

DeLonghi EW7707CB Safe Heat 1500W ComforTemp Portable Oil-Filled Radiator – Black

This is another heater made by DeLonghi. Just like the previous heater from the same company, this heater works great in ensuring that the temperature of any room remains warm. With this heater, you will not have to worry about the size of the room because the heater will effectively keep the temperature in a medium or even large room, comfortable for you.

With 1500 watts of heating power, the heater features an adjustable thermostat and three heat settings so you can set the heater according to your temperature needs. To save energy, the heart has ComforTemp Button, which automatically maintains the optimal room temperature thereby saving energy. It also has wheel for easy transportation. For safety purpose, the heater features a thermal cutoff that prevents it from overheating and an anti-freeze setting to prevent freezing pipes.

However, the heater shows no actual temperature and you can be burnt if you touch the radiator fins.

Honeywell HCE100B Heat Bud Ceramic Personal Heater, Black

-$16.56 SALE OFF Honeywell HeatBud Ceramic Space Heater, Black – Energy Efficient Ceramic Heater with Two Heat Settings for Home, School or Office

Made by Honeywell, this heater will work great in keeping your cannabis grow room warm. Furthermore, you get to save energy when you use this heater because the heater only uses 250 watts of electricity.

The highly portable heater, is also very easy to use and only features two heat settings, a low heat setting of 170 watts and a high one of 250 watts, and one button controls. For safety, the heater has a tip over switch, overheat protection and cool touch housing.

Another great thing about the heater is that it  small enough to fit in any space and comes in fun colors. However, there is no much difference between the two heat settings.

Brightown Space Heater 750W/1500W

Weighing just 3.55 pounds with a convenient handle, moving this heater from one place to another is very easy. This Brightown Space heater also features three heating settings of normal cool blow fan, 750-watt low heat and 1500-watt high heat.

It also has an adjustable thermostat that allows you to save energy by simply lowering the thermostat settings. Furthermore, with this heater you will not have to worry about safety because it automatically shuts of when it starts to overheat. The heater gives off powerful and radiant heat and is perfect for medium sized rooms.

Portable Electric Space Heater with Thermostat

-$6.00 SALE OFF Portable Electric Space Heater with Thermostat, 1500W/750W Safe and Quiet Ceramic Heater Fan, Heat Up 200 Square Feet for Office Room Desk Indoor Use

The great thing about this heater from GiveBest , is t you do not have to wait for long before it heats up the room to your liking. The heater is made in such a way that it is able to produce large amounts of heat within seconds.

Despite its small size of 6.4 x 5.4 x 9.4 inches, the heater features three changeable temperature modes of 1500 watts, 750 watts and a fan mode. To get your preferred temperature, simply turn the selection knob. For safety purposes, the heater features the overheating and the tip-over protection. The heater automatically shuts off when it tips over and also when the temperature inside reaches unsafe levels. The heater is able to restart once the inside temperature is back to safe levels.

However, the surface of the heater can get hot when in use so it is best that you prevent any contact between the surfaces of the heater and your bare skin so that you avoid getting burnt. Also, keep materials that are combustible away from the heater as they can easily catch fire.

Pro Breeze 1500W Mini Ceramic Space Heater

This heater from Pro Breeze features ceramic heating technology , which enables it to provide efficient heating for your cannabis grow room. You also get to control the temperature according to your liking because the heater features an adjustable thermostat that is easy to use. The thermostat also monitors the temperature.

Measuring 7.1 x 5.8 x 9.7 inches, this heater is small in size and you can easily transport it wherever you want with ease because it is also highly portable with a weight of only 2.87 pounds.

In addition, the heater features a flexible heat control system where you get to choose between a fan, a low heat of 750 watts or a high heat of 1500 watts.

In addition, this heater has an anti-tip-over switch and a built-in overheat protection, which makes it a great grow tent heater because it automatically switches off in case it tips over or overheats.

Gazeled Space Heater Electric Heater Portable PTC Ceramic Heater

Space Heater Electric Heater Portable PTC Ceramic Heater with Adjustable Thermostat, Fan Quiet and Overheat Protection ETL Listed for Office Home Kitchen Bedroom and Dorm, 800/1500W

One of the great features of this heater is the 70-degree self-oscillation that provides fast heating to a wide area within a short time. On top of that, this heater made by Gazeled, has an adjustable thermostat for personalized temperature setting.

The heart is able to fit in almost any space because of its small size. However, despite the small size, the heater can warm up a room effectively with its power supply of 1500 watts. In case you want to save on energy, you can do that by switching to a power supply of 800 watts rather than the 1500 watts.

To ensure safety when in use, this heater has both the overheating and the tip-over protection features, which means that the heater automatically goes off when it overheats or tips over. Once the temperature goes back to normal, it will then restart.

In addition to the above great features, this heater also has convenient handles and it is very quiet when operating.

How does a grow room heater work?

A grow tent heater works by ensuring that the temperature in the grow room is conducive for the growth of cannabis. The heater has a thermostat for regulating the temperature levels, and uses electricity. It features an on/off button that you press when turning it on or off. Once turned on, the heater produces heat that keeps the room warm.

As mentioned in this article, cannabis grows best under temperature range of between 20 and 30 degree Celcius. Majority of the heaters mentioned above are small in size making it easy for them to be placed inside the grow tent. However, in case the heater is too powerful , then you have to place it outside the grow tent. Also, be sure that the heater is too hot when you are placing it inside the grow tent.

To ensure that the grow room heater works best, it is advisable to keep the grow room sealed. This will prevent the warm air inside from coming out and the cold air from outside from getting in the grow room.

Buying Guide: Choosing the right grow room heater

Below are some of the factors that you should look out for when shopping for a grow room heater:


To avoid any accidents in the grow room, you need to consider safety when using the heater. Some of the accidents caused by heaters include burns when the heater comes into contact with bare skin. The other accident is when the heater is a source of fire in the grow room especially when it overheats.

One way that most heater brands ensure safety is by equipping the heater with a sensor that automatically shuts off the heater when it overheats. Once the temperature lowers, the heater restarts. The other safety feature found in some heaters is the tip over protection. The tip over protection ensures that the heart stops working once it tips over.

Also, make sure that the heater has been tested by a recognized laboratory like ETL (Intertek). This will ensure that the heater’s construction and performance is safe for use since it has been checked and approved by the laboratory.


Whether you want the heater to be portable or not is up to you. However, since you are going to leave it in the grow room, the portability of the heater will not surpass the quality and safety of the heater since you are going to leave it in the same spot once you get the perfect spot in the grow room to place it. Nevertheless, there may come a time when you may want to move the heater and this is when portability comes in. To ensure easy transportation during such times, you can therefore either go for a heater with rollers or a small heater.

The size of the grow room

Grow tents come in various sizes including 4×8, 3×3 and 4×4.  If you are considering to get a 4×4 grow tent, it is best you get the best information to help you pick the best 4×4 grow tent. Choosing a grow tent with the right size is crucial because if the grow room is large, then you have to pick a heater that will provide enough heat for the whole space. In this case, a fan-forced heater will work better than any other kind of heater.

There are industrial sized heaters that quickly warms up a large room while maintain the circulation to keep the room warm.

For smaller grow rooms, the choice is endless as long as the heater works well. However, ensure that the heater does not give out too much heat, which can have adverse effects on the cannabis.


You probably want a heater that is going to heat up the grow room fast. If that is the case then you need to consider purchasing an oscillating heater. Oscillating heaters work by rotating as heat is fan forced throughout the room. Another great thing about oscillating heaters is that they can work as fans to bring down the heat in the grow room during summer months. The fans can also help in eradicating the bad smell in the grow room. However, if you want to effectively get rid of the bad smell, then you should consider getting a carbon filter.

Types of heaters:

Radiant & Infrared Heaters

Infrared and radiant heaters wok by radiating heat towards the objects in front of them, This means that instead of warming up the air in the grow room, these heaters heat the cannabis plants. This means that very little to no energy is wasted.

However, these heaters are only ideal in small rooms. The great thing about the radiant heaters is that they save tons of energy.

Ceramic Fan-Forced Heaters

Among all the types of heaters, ceramic heaters are the most popular. This is because they heat up the room very fast. When gong for a ceramic fan forced heater, you are going to be spoilt for choice because of the variety of fan heaters from those with timers, oscillation to the heaters with remote control features as well as digital thermostats.

These heaters have multiple fan settings that make it possible for you to control the speed of the fan as well as choose an option that saves more energy when the temperature of the room is not so low.

Baseboard Heaters

Baseboard heaters are the best choice for you if you want a heater that you can safely mount in the grow room. These types of heaters are not designed to be portable but are permanent heaters. They emit heat by using an element or fan.

These heaters are able to heat up a room in just a few minutes and they are also cold to touch when working hence making them safe for use.


From the above review of heaters, one thing that is clear is that there are countless models in the market for you to pick from. From radian heaters to ceramic fan forced heaters, you are definitely going to be copilot for choice. The heaters also have very many diverse features so you have to be careful when making your choice.

Hopefully, this guide has been helpful to you in your search for a great heater for the cannabis grow room. Whichever heater you pick, make sure that it takes care of factors like overheating and tip overs.

Top Selling Grow Tent Heater On Amazon:

Bestseller No. 1
Honeywell HHF370B 360 Degree Surround Fan Forced Heater with Surround Heat Output Charcoal Grey Energy Efficient with Adjustable Thermostat & 2 Heat Settings
6,014 Reviews on Amazon
Honeywell HHF370B 360 Degree Surround Fan Forced Heater with Surround Heat Output Charcoal Grey Energy Efficient with Adjustable Thermostat & 2 Heat Settings
  • ENERGY EFFICIENT HEAT: Providing 360 all-around warmth, this portable heater is ideal for small to mid-sized rooms. The Low setting does not require as much electricity to operate, so it is more energy efficient and a better option for saving energy.
  • EASY TO USE: Delivering enhanced safety features & easily controlled comfort, this heater features an adjustable thermostat as well as 2 heat settings, a 360-degree tip-over switch, overheat protection and an easy-grab, cool touch carry handle.
  • INCREASE YOUR COMFORT: Using portable heaters in your home can help increase comfort & supplement home heating needs. There is a range of Honeywell heaters covering personal, ceramic, fan forced, radiant and infrared to meet all your heating needs.
  • SMART SAVINGS: Portable heaters are a smart and easy way to add warmth to any space. By turning down your whole house thermostat a few degrees and heating just the room you are in, a Honeywell heater can help you save money while providing soothing warmth.
  • HONEYWELL QUALITY: Help improve heating & energy savings in your home, bedroom or office using a Honeywell portable heater.
-$62.59 SALE OFFBestseller No. 2
Bio Green PAL 2.0/USDT Palma Greenhouse Heater incl. Digital Thermosta
  • Easily heats spaces up to 120 ft. ² ideal for greenhouse heating, sheds, store room, garage, milk-house
  • With digital summer/winter thermostat (110 V) UL - Approved and external sensor cable to measure the ambient temperature in the greenhouse.
  • Stainless Steel housing, Floor-Standing greenhouse heater with display x4 splash-proof
  • Stainless Steel heat elements - engineered in Germany for greenhouse heating use
  • 5118 BTU/ 1500 W heating output - durable fan with bearings made for humit environments
Bestseller No. 3
Electric Patio Heater - Greenhouse Fan, Heater Portable Space Heater, Adjustable Thermostat, for Grow Tent, Office, Workplace, PTC Fast Heating, Electric Ceramic Heaters,Metal Base
  • 【Patio Heater for Outdoor】☀ The electric outdoor heater adopts innovative PTC technology. Garage fan heaters only generate the heat necessary to fulfill its pre-programmed goal. As well, because PTC stones do not generate heat at a constant rate like resistance wires, they will cool down quickly to avoid overheating, which means its internal temperature will not consistently stay high. This garage space heater is much more safe than others.
  • 【Portable Heater Greenhouse or Patio】☀ Do you feel cold when working in the greenhouse or garage? I will advise you might need a portable greenhouse fan heater. This greenhouse heater is perfect for you will keep your feet and legs warm. Also,with more than 88.6 inch long cord, it can be used garage or workplace. You will be surprised with its wonderful performance. The garage space heater can heat up quickly and quietly. Garage space heater diameter:6.3in, height: 8.7in, thickness: 4.9in.
  • 【Adjustable Heat Setting for Outdoor】☀ Do you want a warm hug when coming home from the cold outside? Turn on this garage space heater fan, it will heat up instantly & welcome you home by a warm hug. It has 3 heat settings: fan only, low and high heat. The 1500 watt engine can heat the atmosphere quickly and warm your body in 3 seconds without noisy. You can enjoy natural wind in Autumn, hot wind in cold Winter.
  • 【Energy saving for Outdoor】☀ The space outdoor heater can help reduce overall heating costs. Use it as supplemental heat to the main heating system - no need to crank up the thermostat for the whole house when you are just hanging out in one room. This garage fan heater provides up to 1500 watts of heat on the high setting, and its Fan Only option generates refreshing air circulation without added heat for year-round convenience. No worry about winter electric bill any more!
  • 【Overheat Protection】☀ Sometimes you might forget to turn off the garage heater and keep heating all night. Don't worry about this situation.The heater will auto shut off when overheating or reach the setting temperature because of overheat protection. Any questions, please contact us and we will able to solve them for you.
Bestseller No. 4
iPower Electric Heater Fan for Greenhouse, Grow Tent, Workplace, Overheat Protection, Fast Heating, Spraywater proof IPX4, Black
  • [Overheat Protection] This heater is equipped with internal heat limiting control and overheats protection circuit. Once the desired room temperature is reached, the heater will automatically be shut off.
  • [Widely Application] This powerful and portable space heater is lightweight and easy to carry, does not take up extra space. It is convenient for you to move the portable fan heater for room to any place as you want with a built-in carrying handle. With this portable feature, you can use this space heaters for garage, kitchen, living room, workshops, basements, sheds and so on. Pick the heaters for you and your family, you will be surprised with its wonderful performance.
  • [Spray Waterproof] IPX4 Waterproof ideal for use in the areas such as greenhouses, barn, grow tents.
  • [Fast Heat Up] This powerful and portable space heater can quickly heat up small spaces. No more suffering in the cold winter. High efficient and energy-saving. Adjustable Heating range from -58°F to plus210.2°F (-50° C to plus 99 ° C)
  • [Electric Supply] Air output 4500 Cubic Foot/ Hour Electric Supply 120V 60Hz from 25W to 1500W.
-$30.00 SALE OFFBestseller No. 5
AKUSAKO Electric Greenhouse Heater With Digital Thermostat Controller For Green House,Grow Tent, Flower Room, Overheat Protection, Fast Heating, Spray Water Proof
  • 【ACCURATE DIGITAL THERMOSTAT CONTROLLER】: professional grade waterproof temperature probe Capable of powering heating equipment as conditions change, plug and play, simple to use. Support ℃/℉ reading and temperature calibration.
  • 【OVERHEAT PROTECTION】: The heater is equipped with an internal temperature limiting thermostat, which will automatically shut down when a potential overheat temperature is reached, protecting the circuit.
  • 【SPLASH-PROOF】: the heater has a certain waterproof function, suitable for use in wet areas Suitable for greenhouses, planting tents, flower rooms and other areas.
  • 【FAST HEATING】: the heater can quickly heat up to 175 square feet of space (depending on the insulation of the space) running very energy efficient Ideal for greenhouses, milk sheds, garages, workshops
  • 【HIGH QUALITY SERVICE】: We are glad to receive users' comments about our products, if you have any questions about the products, you can contact us at any time
5/5 - (3 votes)

Bowden draws from over a decade of home growing experience as well as consulting for small-scale and hobbyist-level growers. He has written hundreds of articles, thought pieces, and tutorials about growing cannabis at home

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