9 Best Indoor Heaters For Your Grow Room in 2021

Honeywell Uber Heat Grow Room Heater

Mr. Heater Big Buddy Indoor Heater

Lasko Ceramic Grow Tent Heater

The air temperature in your grow room needs to be able to support your plants at any point of growth. There are occasions when the plants have to be in a warm enviroment to ensure they are well-nourished and blooming.

The grow room heater will distribute adequate heat to hold your grow room’s temperature at the correct temperature in certain situations. However, if you make use of less-energy bulbs or operating with a limited number of lamps, you might need an extra heater to keep your plants happy.

Space heaters provide extra heating to a chilly growing tent, mainly when your growing lights do not dissipate enough heat.

Not all of the heaters you will find on the market have the potential to heat your growing atmosphere optimally. Before choosing a grow tent heater, you can study your growing room’s temperature parameters and then select a model that suits your needs.

There are dozens of heaters on the market, and it can be frustrating to know which one fits well for cannabis plants.

In this article, we’re breaking down the best heaters we’ve seen working well to cultivate marijuana indoors.

Benefits of an indoor heater

Using a growing tent allows you greater control over your growing conditions. But the ambiance in the room around your tent can be vulnerable to variability that may affect your performance.

If temperatures get so cold, you can have severe issues with your plants. When plants sink below 60°F 15°C, they can exert a lot of pressure and make them more vulnerable to molds and fungi.

A growing tent heater is a perfect way to exercise more control over your grow room climate and suit your grow room system. The heat will shield your plants from dips at temperatures that could harm their growth.

Heaters are a perfect addition to your growing space if there is no additional heat going into the room. Don’t make the mistake of thinking that your rising lights can give you enough temperature, especially if you live in a territory that is vulnerable to cold weather.

Some essential features to look out for in an indoor grow room

Knowing which indoor grow room heater to purchase is such an uphill task, and this is because there are so many brands in the market today:

Heat Type

You’re still going to need to know the type of heat they have. Are they just supplying stationary heat? This may be perfect for smaller tents, although it might be troublesome for more giant tents. Fan-assisted heaters can disperse heat equally through more expansive spaces.

Temperature Regulation

There is also the consideration about temperature control. Does the heater have redundancies, such as thermistors and thermal fuses, to avoid power surges? Is there a digital interface that takes the guesswork out of setting the optimal temperature?


How safe is your heater? What protection features make it easy to give you peace of mind when you use it? At the very least, it should have an automated shut-off to prevent overheating. Ideally, it can also be constructed of durable materials and have a low center of gravity to avoid falling over. A heater with a timer is also useful so you can schedule it or switch it off after a certain period. This means a secure, growing climate and lower electricity bills.

Types of Indoor Grow Room Heaters

Are you looking for realistic solutions to select the most appropriate heating method for your indoor gardening? If yes, the first thing you need is to think about the various indoor room heaters’ multiple styles.

Here’s a short collection.

Ceramic Heater

Preferably used in smaller spaces, ceramic heaters are available in two main types. These heaters use a ceramic heat stone rather than an exposed heat source and often have a fan.

Radiant Ceramic Heater: Convection heat distribution throughout the area.

Connective Ceramic Heater: Directional heating.

Rapid heating is undoubtedly the benefit of ceramic heaters. Nevertheless, be mindful of the fast cooling down after the shutdown as well. They are naturally safe for indoor use due to non-heat absorption plastic packaging, no harmful pollutants, etc. Waterproof models are also available. However, if you have one, we suggest that you should not leave these heaters unmonitored overnight.

Oil – Filled Heater

Recommended for medium to large rooms, these efficient heaters are slower to heat up but provide continuous heat. Physically, they mimic conventional radiator heaters. Necessary for 24/7 use, it features oil-filled fins that are heated to raise temperature levels.

Burns and alternatives are non-existent alongside zero combustion gas output. They are low power users as they prevent the sun from shutting down due to the heat reservoir. Since they do not decrease humidity or burn oxygen, they are safe to use as well. Waterproof models are available as well. The only drawback is the initial expensive price, but it’s going to last a long time.

Propane Heaters

Propane gas heaters are efficient devices that satisfy the needs of large rooms. It’s easy to mount, lower relative costs, low maintenance, and simple to heat up. However, pollution can affect plants in the absence of venting. Be wary of the fuel being flammable. It’s easy to use overnight, as most come with automatic shut-off features. Waterproof models are also available.

Tubular Heater

You may use the Tubular Heaters either vertically or horizontally. Fluorescent light-like heaters fit well in smaller tents.

The Best Indoor Heaters For Your Grow Room Are Reviewed Below


Honeywell Uber Heat Grow Room Heater

Available in Silver andBlack, the Honeywell Uber heat indoor grow room heater is a perfect heating system and a great addition to your grow room. It comes with three silent settings, which include high-heat, low-heat, and fan modes. Driven at 1500W, you can access 11 temperature levels to heat the 300sq/ft coverage area. The ceramic heater is supplied with fan-powered equipment.

Key Features:

  • Efficient Heating energy
  • It offers powerful 1500 watt heat.
  • Modern design
  • It does not require much electricity.
  • Suitable for tabletop placement
  • Adjustable thermostat
  • Improves heating and energy savings


  • Product dimension: 8 x 5.8 x 9 inches
  • Product weight: 3.9 pounds
  • Manufacturer: Helen of Troy
  • Heating Method: Ceramic
  • Warranty Length: three years limited warranty
  • Included components: Ceramic Heater
  • Stylish but functional
  • Space-saving design
  • Low energy saving setting
  • Comes preassembled
  • Quite expensive
  • Noisy


Mr. Heater Big Buddy Indoor Heater

If you’re searching for a valuable propane heater, look no further than Mr. Heater Big Buddy Indoor Grow room heater. This high-end indoor gadget is obtainable in red and gray colors. With a 300 sq/ft coverage area and an output capacity of 4000W to 18000W, this is a powerful heater.

It’s also effortless to use. For stable temperatures, toggle the heat level control knobs that rotate between low, medium, and high modes. This liquid propane heater is directly connected with two 1 lb cylinders and appears to work well with the confined spaces.

Key Features:

  • Radiant heater
  • Approved for indoor and outdoor use
  • Clean burning
  • 100 percent efficiency
  • Connects to a propane tank
  • Knob for steady temperatures
  • Detects low oxygen level


  • Product Dimension: 19 x 12 x 17.75 inches
  • Product Weight: 16.42 pounds
  • Product Brand: Mr. Heater
  • Manufacturer: Enerco Group Inc
  • Model: F274830
  • Swivel regulators
  • Clean burning
  • Low oxygen shut off system
  • Anti-tip-over switch
  • Expensive
  • Some complaint about a pilot light


Lasko Ceramic Grow Tent Heater

One of the fantastic features of this Lasko heater is the built-in handle and the three setups. The handle makes it much easier for you to carry the heater from one point to another, whether you keep it on the floor or the tabletop.

With 1500 watts of calming warmth, the heater guarantees that your cannabis stays warm even though the temperatures are cold. Controlling the heater is also simple, as it offers easy-to-use manual controls. Besides, the fan-powered delivery means that the heater has a capacity of 300 sq. Ft. Field. It also has an adjustable thermostat and a large oscillation. Although the heater is small in size 8.34″ x 6.55″ x 11.66″ in length, width, and height, it functions very well. With this heater, you won’t have to think about turning it on for too long because it has an automatic overheating safety option that causes the heater to turn off instantly if it’s left on for too long. Often, no fears about suffering from burn when the naked skin comes into contact with the heater because the heater’s exterior remains cold when the heater is on.

Key Features:

  • Perfect for tabletop or floor use
  • Easy top-mounted control
  • Adjustable thermostat
  • 1500 watts of comforting warmth
  • Fans only
  • Fully assembled with carrying handle


  • Product dimension: 6 x 4.5 x 9.2 inches
  • Product Weight: four pounds
  • Heating method: Ceramic
  • Manufacturer: Lasko Metal Products
  • Product ASIN: B006JV24IU
  • Adjustable thermostat
  • Convenient carry handle
  • Lightweight
  • Overheat protection sensor
  • Preassembled
  • Low durability
  • Noisy fan
  • Permanent red light


Lasko Designer Series Ceramic Oscillating

When it comes to oscillating ceramic heaters that provide the requisite extra or additional heat, the Lasko 6435 Designer series is one to add to the list of best heaters. The heater is available in beige and gold color choices. Technical requirements provide an integrated timer with an option of 1, 2, or 4 hours, while a power output of 1500W is given. This wireless, remote-controlled gadget works at two levels that are low or high.

Key Features:

  • Blends well with décor
  • Stylish body
  • It looks like a piece of art.
  • Adjustable thermostat
  • Built-in timer
  • Easy to read LED temperature


  • Product Dimension: 8.25 x 8.25 x 16.05 inches
  • Product weight: Three pounds
  • Manufactuer: Lasko Fans
  • Model Number: 6435
  • Heating Method: Convection
  • Warranty: Three Years
  • Adjustable thermostat
  • Inbuilt 7-hour timer
  • Simple setup and operation
  • Three-year warranty
  • Overheat safety
  • Costly
  • Circuit tripping complains
  • Cools down rather quickly after shutdown


Vornado MVH Indoor Grow Room Heater

The Vornado MVH Whole Room Vortex Heater is available in black, falling at the other end of the heating continuum. The high cost comes with a bunch of features like Vortex Technology dependent thermostatic temperature regulation for dialing in the perfect thermostat settings. The three sets are 750W, 1125W, and 1500W, which provide variable heat output with a total coverage area of 180 sq/ft.

Key Features:

  • Vortex air circulaton
  • Intense heat
  • Advanced safety features
  • Automated safety shutdown
  • Quiet heat setting
  • Internal thermostat
  • Superior support


  • Product Dimension: 9.2 x 10.4 x 10.6 inches
  • Product weight: 3.76 pounds
  • Manufacturer: Vornado
  • Heating method: Forced Air
  • Warranty: Five-year warranty
  • Regulates watts usage
  • Whisper quiet
  • Tip-over protection
  • Installation free
  • Lacks proper insulation
  • Costly


Bio Green PAL Indoor Grow Room Heater

One of the most preferred electric fan heating systems for your greenhouse is the Bio Green PAL 2.0/US Palma. The organization has mixed creativity with eco-friendliness to provide an extreme 1.5kW oh of heating capacity that can circulate 163 cubic meters of air per hour.

Key Features:

  • Floor Standing
  • High air circulation
  • Mold formation
  • Heater casing
  • Painted steel grills
  • Energy efficient


  • Product Dimension: 11 x 11 x 14 inches
  • Product Weight: 10.14 pounds
  • Manufacturer: Bio Green
  • Product Model: PAL 2.0/US
  • Color: Grey, Balck
  • It prevents the formation of mold.
  • Low energy use
  • Portable design
  • Inbuilt capillary thermostat
  • Splash – Proof rated to IPX4
  • Expensive
  • It takes time to heat up.
  • Two-year warranty


DeLonghi Oil-filled indoor Grow Room Heater

The DeLonghi EW7507EB oil-filled radiator, in black, offers basic functionality necessary for any hydroponic venue. It helps you to create an energy-saving electronic climate such as automated temperature control. The heater also provides a dual purpose timer program for two different startups and shutdown dates. The heating elements are fully enclosed in its softly rounded housing.

Key Features:

  • Silent operation
  • Best for medium and large rooms
  • Regular heat in cold seasons
  • Permanently oil seal
  • Energy-saving double function
  • Simultaneous program function
  • Adjustable thermostat


  • Product Dimension: 14.5 x 6.3 x 25.2 inches
  • Product Weight: 24.2 Pounds
  • Manufacturer: Delonghi
  • Volume: One Millimeter
  • Heating Method: Radiant
  • Warranty Description: One Year
  • Patented Vertical thermal chimneys
  • Digital display and thermostat
  • Automated thermal cutoff
  • Eight hours runtime in each mode
  • Low and safe to touch temperature
  • Heavier than all the heaters
  • Writing in the background is difficult to see


OPOLAR ceramic Indoor Grow Room heater

The Polar Ceramic Space Heater is stylish and lightweight, making it ideal for your growing room. The edition is available in vivid yellow and blue colors. The unit comes with a robust structure that is not the only permitted ETL but has tip-over protection. You have a convenient holding stick, too.

Portability is at an Opolar cost. It’s not going to eat up a lot of space in your growing field. It’s great for small rooms. It has a superior thermostat control that provides good heat. The heater will be turned off if the temperature of the room becomes colder than the thermostat settings.

Key Features:

  • Abundant heat production
  • Red power indicator
  • Automated overheat system
  • Keeps the surrounding warm and toasty
  • Heating protection
  • Three modes heater fan


  • Product Dimension: 7.1 x 5.9 x 11.1 inches
  • Product Weight: 3.5 pounds
  • Manufacturer: OPOLAR
  • Product Model: HE03
  • Heating Method: Ceramic, Fan_and Forced Air
  • Product Color: Yellow
  • Portable design
  • Inbuilt safety features
  • Emits less than 50 dB noise
  • Durable thermostat
  • Some reviews claim it doesn’t last long.


Space Indoor Grow Room Heater

If you want a warm room atmosphere in cold winter, then choose the Gazeled Space Heater. It provides the most effective way to improve the temperature of your growing climate. It has a heavy-duty structure that is small, compact, and sturdy. The style is also sleek and silent.

It is fitted with an adjustable thermostat that helps maintain optimum room temperature growth. The machine will not turn on if the room’s temperature is colder. It is packed with an easy-to-use control button with three settings. You may select a fan for high or low settings. The output of the heater is up to 1500 watts.

It is also equipped with two built-in protective features: tip over and protection against overheating. In case of overheating or when it falls through, the device can turn off immediately. Besides being compact, this model comes with an incorporated carrying handle that makes it easy to reposition. You also have a UL-listed heavy duty chain, which is six feet long for superior maneuverability.

Key Features:

  • Ceramic heating element
  • Provides great warmth
  • It comes with two heat settings.
  • Adjustable thermostat
  • Overheating protection
  • Automated shutdown when overheating.


  • Product Dimension: 6.4 x 5.7 x 9.3 inches
  • Product Weight: 4.62 pounds
  • Manufacturer: Gazelle
  • Heating Method: Ceramic, Fan, and Forced Air
  • Product ASIN: B077N6GGWY
  • Product Color: White, Black
  • Adjustable thermostat
  • It comes with a comfortable handle.
  • Easy control three-knob setting
  • Tip-over protection
  • Could trip your electric circuit

Buying Guide Questions

How to keep grow room warm when lights are off?

With nights closing and temperatures falling rapidly outdoors, it’s time to take action about indoor room temperatures growing and maintaining the plants, particularly the roots, warm and snug. This is particularly necessary when growing in a hydroponic system. Unlike a soil or coconut coir substrate, which provides a limited amount of insulation to the root region, it does not expand in water.

Plants need air around them to be wet. When winter rolls in, it is best to maintain your growing room in the correct temperature range of about: 25-28 Degrees during the lighting time for your grow room. However, when the lights are out, it is best to lower the temperature by a few degrees to around 18-21.

While using the temperature, plants can intuitively feel that the cold months are coming. As the nights get colder and the winter begins to set, the plants start to adapt to changing weather conditions. When temperatures begin to fall, we see a decrease in plant growth. Temperatures below 18 Degrees would see a massive reduction in plant output, while anything below 15 Degrees could see things coming to a full halt, leading to losses in time and effort spent.

To begin with, a well-insulated cultivated area is essential to the conservation of plant temperatures. Instead of putting your rising tent on a cold board, you can use a carpet or a rug as a form of insulation. Wrapping the whole tent with building insulation is also a likelihood; if it helps to keep your house warm, it works to keep your plants warm!

Rather than putting your plants on the grow tent floor, place empty trays or pots in the opposite direction and have your plants placed on them. This provides a little gap between the cool floor and the bottom of the pots or the hydroponic device.

What kind of heater should I use in a grow room?

The type of heater to be used depends on the size of the room. Besides, you need to know how much time you’re going to use the radiator. Today, many growers pick up oil-filled heaters for rooms larger than 10×10, but they’re perfect for smaller spaces as soon as you place them in lower environments. Read more here: Best Oscillating Fans for Your Grow Room

What is the most efficient indoor heater?

The beauty of an effective indoor heater is that rather than trying to fire up your whole house by more costly means, you can only have a single area raise in temperature, such as your room, office, toilet, basement, etc. Virtually everybody can use it, so their advantages and cost-to-warm ratio are well worth the investment. One of the most potent heaters is the Vornado and DeLonghi brands. It might seem challenging to find the right warmer for you at first, but it’s a lot easier than you expect. Knowing all this detail will make it much easier to shop. In comparison, being educated about protection will go a long way towards avoiding injuries.

What is the best indoor electric heater?

Most indoor electric heaters come with high operating costs – heavier than central gas heating. The cheapest ventilation you don’t get is the one you don’t have. Make sure the heaters are just on as needed and are as low as comfortable. Stop the draughts so that the warm air is not wasted. Electricity is a reasonably expensive way to heat your home. For many, it might be necessary to have a portable electric heater – mainly if you live in one of the four million or so households in the UK that do not have mains gas heaters. Electric heating is also a smart option if you’re only looking to heat one room or only need to heat in quick, sharp bursts.

Nowadays, an indoor electrical heating appliance is expected to come with a range of specs – at least if you’re going beyond cheaper choices. LCD temperature displays are popular, useful for knowing when the room is getting too hot. Often the heater comes with remote control for flipping on and off or changing the temperature.

Another helpful feature is a timer, which helps you schedule the heating for the moment you wake up or return home. Frost safety will immediately turn on the radiator when the room is below 5C.

How can I heat my greenhouse for free in the winter?

The cost of heating a greenhouse in winter can often be higher than the advantages and incentives of using one to cultivate your own.

Here are several inexpensive ways to heat a greenhouse without ever using electric power; rotting hay or straw bales, a dust bin or an old oil drum filled with water, even a rabbit hutch full with a rabbit can heat it.

Mini Platic greenhouse: If you can’t worry about bubble wrap your greenhouse and still want to grow plants in winter, consider adding a cheap mini plastic greenhouse within the glass greenhouse. Put a

Rabbit hutch in your greenhouse: The cheap way to heat your greenhouse, if you have a pet rabbit, is to put the hut inside the greenhouse. The heat it radiates will take the cooling of the air. Maybe the bunny enjoys it, too.

Oil drum filled with water or Dust bin: This will save the greenhouse heating bills. Place a dust bin or an old oil drum in your greenhouse and fill it with water. Water has a high specific heat (the amount of energy used to increase the temperature by one degree) and retains extra heat to hold the temperature down throughout the season. The water’s high specific heat would also allow you to hang on to the heat in the winter and keep your greenhouse a few degrees colder in the winter. I haven’t done this, but it seems like it’s going to work.

What kind of heater is safe to use in a tent?

From a safety point of view, electric heaters are undoubtedly cooler but less practical than a portable gas heater. However, from our study, if you are using coal, catalytic (also called radiant) heaters are the best type of heaters to be used in a tent. Mr. Heater’s brand of indoor heaters comes out floating on top of our list for the most preferred first because of its suitability for indoor tents and the various safety features such as tip over and low oxygen cut off. With a 1-year warranty added to the purchase of this device, your investment is further secured.

What type of heater uses the least electricity?

The convector heater, oil-filled radiator, Fan heater, and Halogen heaters. Electric heaters are all known to be 100% effective because they transform all the energy they use into heat, but that doesn’t mean they’re cheap to power. You need to look at the heater’s power level seen in kilowatts to measure the operating cost (kW). The higher the power level, the more heat will be generated, but the price will be proportionally higher. Electric room heaters are all expensive to operate and not ideal as the primary heat source. Choose a form of the heater based on how you wish to heat the room. Otherwise, you will have a high running cost but do not notice an improvement in the heat’s comfort.

What type of heater is the cheapest to run?

While gas heating is usually less efficient, it’s about three times cheaper than electricity – so if you’re worried about prices, it could be right for you! Electric heaters are more comfortable to purchase in advance. The cheapest compact electrical grow room systems are oil-filled radiators or halogen grow room heaters. The most inexpensive fixed electric heater to work on is a storage heater – which would just set you back about 13p an hour. Be willing to pay out a little more for the installation, though!

Do Zen heaters work?

Zen heaters are lightweight and trendy. The Zen Heater doesn’t take up too much space and makes a perfect addition to any home. Notwithstanding its size, Zen Heater managed to heat their spaces quickly and effectively, allowing the heat to disperse uniformly across the indoor room.

Therefore, we recommend Zen Heater to anybody looking for an energy-efficient, money-saving heater that dramatically decreases their heating bills when operating at optimum parameters in every room of your home or office at any time. It also helps you monitor the temperature by quickly changing the thermostat at the radiator’s top.

What are the best indoor heaters?

To help give you an idea of the best indoor heater choices, the indoor heaters reviewed above are some of the best in price points, according to the expert advice given above, which we have opposed to some of the top-rated models’ various significant retailers.


In most indoor gardens, such as small weed growing rooms or tents, electric heaters are ideal for heating the growing area’s heart. Please remember to schedule your thermostat or rheostat to avoid overheating your plants. Don’t neglect the smaller ones. Any high-performance compact unit can do a better job than larger ones. Bear in mind the privacy of your house. Choose a model with safety mechanisms such as tip-over and excessive heat protection to give you more peace of mind when growing indoors.