The Best Heater for the Grow Room or Grow Tent !

When the seasons start to change, and fall becomes winter.

Depending on where you live when growing cannabis indoors you may need a heater for your grow room or grow tent.

A space heater can be the cheapest way to heat a grow room.

If you have been looking around it can be a little confusing on which heater would be good for the size of your room or tent.

Also there different types out there, from ceramic to oil filled and even infrared (not recommended)

In, this review, it will cover all you need to know when picking out the right space heater and answer most of your questions.

Benefits of a heater for the grow room or tent

  • Great for heating your room when the temperature fluctuates too much.
  • Perfect for maintaining a constant temperature when using LED in the grow room or tent around 80-85 degree Fahrenheit.
  • If you have no heat coming into room
  • Lights are not making the room hot enough
  • No heat vents in winter if you have a closed room and in a northern climate
  • Your grow room is in in a separate building with no furnace.

What to look for in a heater

Size of room: Make sure it will fit your needs, most heaters out there will do the job to heat you grow room or tent.

Power use how many watts this is something to consider because heaters do run some power up to 1500 watts or higher.

Digital-specific temperature settings this is a nice feature, so there's no guessing and trying different parts of a dial

Auto turn off is also excellent when getting too hot it turns itself off

Set the time to turn off this is pretty cool. Then there's no need to have extra timers.

What type of heat is provided, such as a fan to circulate air or stationary heat like oil filled.

Safety features what do they offer cool to touch, auto shutoff for overheating or. tipped over

What are the things you should look out for when using a heater?

These are the most important things to consider when using a heater.

Humidity, a heater can strip it all away real quick

The Orange glow from different heaters, check it out before using make sure if it does glow orange to use it only when lights are on.

Power usage, remember to compensate for additional power, so you don’t blow your circuits.

grow-room-heater

Different types of heaters

There are many different types of heaters out there you can use I will focus on two of the most popular.

The differences are just how they provide the heat and the element the heaters use.

Ceramic heater uses a ceramic heat stone usually with a fan feature as well. These can be used in small rooms

Oil filled are filled with oil they take a while to heat up but can provide a constant form of heat to the room.

Recommended for medium to large rooms

Common questions about heaters and growing 

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

The kind of heaters will depend on your size of a room and how long you intend on running it for.

Such as all day or at specific times for example when there is temperature swing in your environment that are too drastic for your plants to handle.

Most growers I know use the oil filled ones for rooms greater than 10 X 10 and even smaller at a lower settings.

They do have some ceramic ones out there but there not that good for bigger rooms.

Whats the best way to heat grow tent?

When using a grow tent the best way to heat it up is either inside the tent or to have the heater outside the tent depending on the size.

Recommended method is for tents smaller than 6 x 6.

For small grow tents it's recommended to and warm the room around the tent.

Then use a fan to cycle air into the tent if you require more heat.

This will help to keep your plants from drying out. 

Depending on the size of grow tent you may be able to use it in the tent if you still have room for your cannabis plants. 

This could be done with sizes bigger than 10 x 10. Because it may be hard to heat the surrounding room the grow tent is in .

Keep in mind the amount of plants and distance from heater.

Just be cautious you don’t dry the plants out to much.

What do I do if my grow room is bigger than average or separate building for heat?

A bigger than average grow room can be tricky you can try and use a couple oil-filled space heaters in different parts of your grow space.

There are option for baseboard heaters you could place around the room to provide additional heat constant heat.

Or other the possibilities are a more industrial type such as the ones for garages or actual furnaces in a separate room for the place.

It all depends on the climate you live in, and also insulation helps out a lot if it's different building.

Some time the bulbs themselves are enough to heat the growing space in a large area depending on climate

Grow Tip: Make sure you use some black tape to cover the lights on the heaters. It will ensure your plants do not start to hermaphrodite out.

Heaters for grow tents:

These are the top picks for the heater that could be used for grow tents.

Remember it's not good to put a heater in the tent, but if you have to make sure you have a temperature control gauge these heaters only have a dial system.

The Lasko ceramic heater has adjustable temperature control s which comes with a fan that has a two-speed setting and no fan option as well.

1500 watts on high speed will heat up a small room or tent in no time flat.

Do not exceed 100 sq ft

Pros:

  • Heat up quick
  • Can maintain steady heat in small rooms
  • Auto shut off safety feature
  • Easy dials

Cons:

  • Small
  • Noisey


The Honeywell uber heater is one small unit but put out a lot of heat.

The heater has only two settings, and cool to touch.

This heater will work good for shorter periods of time and small spaces.

Pros:

  • Great for small rooms
  • Basic space heater
  • Cool on outside
  • Inexpensive

Cons:

  • Just two settings
  • cannot run for long duration


The Vornado MVH is one of those heaters that can heat a small room quickly.

This heater has three different power settings to regulate heat output 750W, 1125W, 1500W.

Auto shut off if tipped over.

 What's neat about the Vornado is it’s cool to touch and circulate the air in a vortex circle which moves the heat against walls to create a constant temperature.

Not recommended for this heater to join a small grow tent but it's great for heating a small room 10x10

Pros:

  • Quick to heat
  • Regulate wattage used
  • Circulates the air efficiently
  • Easy dials

Cons:

  • Not suitable for larger rooms

Heaters for the grow room 

Here are a couple of the top heaters from the grow room.

These should keep an area warm 24/7 if need be, for rooms bigger than 10x10 up to 15X20 square feet.

Note : These will work in smaller rooms.

The DeLonghi EW7507EB has many key features such as a digital display and temperature setting controls.

Which make it perfect to set the temperature and forget about it.

This heater is ideal for large rooms when constant heat required.

There is a 24-hour timer, so there is no need for additional timer plugged into the radiator.

The EW7507EB is a beast, you never need to refill the oil, and it comes with its own antifreeze to stop the pipe form freeze.

I Hope It's not that cold in your grow room.

Pros:

  • Specific temperature setting
  • 24-hour timer
  • Big or small rooms
  • Long Time Running

Cons:

  • If power interruption settings are wiped
  • Slow to heat up


The DeLonghi EW7707CM Safeheat is a more basic oil filled heater; it boasts 1500 watts for the wall.

There are a thermostat dial and three different setting to for your type of heat you would like. Also comes with auto shut off.

The EW7707CM can be a solid choice on a budget looking to heat a medium to large room for coast heat.

Pros:

  • Great if on a budget
  • Heats room bigger than 10x10
  • Temperature dial easy to use
  • 3 type of temp settings

Cons:

  • No specific temp setting
  • No timer

Final Thoughts

This review on heaters for the grow room or tent should give you a better understanding when looking for a proper heater.

Their many options out there these are just a couple.

When using a tent, it's best to heat the room and cycle air in if need be you can use an oil filled or the ceramic type depending on the size of room your tent is in.

For medium, to a large room, a oil filled space heater should be good. 

Larger rooms you may require something a bit bigger than an oil filled heater.

Could try even use baseboard heaters this can be another option to try. Easy to set up too.

Have you had issue with cold temperatures in your grow room or tent?

How did you recover?

Let me know in the comments.

Grow on my friend.


2 thoughts on “The Best Heater for the Grow Room or Grow Tent !

  1. Hi, thanks for this informative post, but I am not sure to understand this “When using a grow tent the best way to heat it up is to have the heater outside the tent and warm the room around it.”, why would that be ? Why not directly in the tent ?

    Thanks in advance for your answer.

    • Hi Billy,

      Great question, you can have a heater in a grow tent depending on the size,how many plants you have , space ect..If you have a smaller grow tent like 6×6 I recommend using a heater outside a tent because the heater can dry your plants out pretty quick if your not to careful in smaller areas. When using larger tent you will probably have to put a heater inside the tent depending on where the tent is located an the space surrounding it.

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