Propane Heaters In Grow Room: Are They Safe To Use?

Temperature control is an essential aspect of successful indoor gardening, especially in a grow room. Plants require a specific temperature range to grow and thrive, making it important to choose the right heating device.

There are two main types of heaters used in grow rooms: propane and electric. Both have their advantages and disadvantages and choosing the right one can be a challenging task. In this blog post, we’ll explore the key factors to consider when choosing between propane and electric heaters for your grow room. We’ll discuss the differences between the two types of heaters, their advantages and disadvantages, and the factors to consider when selecting the right one for your indoor garden. Let’s dive in!

Propane Heaters

Propane heaters are a popular choice for heating greenhouses due to their efficiency and portability. They work by burning propane gas to generate heat, which is then distributed throughout the room.

Propane heaters are ideal for heating large spaces quickly and efficiently, making them an excellent choice for larger grow rooms.

Propane Heater Advantages

  • Ability to heat large spaces quickly and efficiently
  • Portable and easy to use
  • Can operate during power outages

Propane Heater Disadvantages

  • Risk of carbon monoxide poisoning if not used properly
  • Potential fire hazard due to the use of flammable fuel
  • Requires a steady supply of propane

Carbon monoxide is toxic for both, humans and plants. To prevent carbon monoxide poisoning in greenhouses, it’s important to ensure adequate ventilation when using propane heaters. However, this is not the case in grow rooms and grow tents because of their relatively smaller space compared to greenhouses.

Carbon monoxide could accumulate and reach toxic levels very quickly in a grow room or a grow tent even after ensuring proper ventilation.

Another critical aspect that growers forget about is the potential fire hazards that a propane heater could lead to. Indoor growing spaces like a grow tent could easily catch fire from a propane heater if sufficient distance is not kept.

As an indoor gardener, you should be aware of the fire hazards associated with your grow tent or grow room, and that’s why I have created the ultimate guide on how to fireproof a grow tent. This guide is a must-read for every indoor gardener.

When using propane heaters, it’s important to keep in mind that they require a steady supply of propane. This means that you’ll need to refill the tank regularly, which can be inconvenient and costly. However, propane is readily available and can be purchased at most hardware and home improvement stores.

Additionally, propane tanks should be stored in a cool, dry place, away from sources of heat and flame.

In summary, propane heaters are an excellent choice for heating large commercial greenhouses quickly and efficiently. On the other side, it is not the the safest heating method to heat up a grow room or a grow tent.

Heating Alternatives For A Grow Room Or A Grow Tent

There are other heating alternatives to heat up a grow room or a grow tent. Electric heaters areone of the popular choices for heating grow rooms. They work by converting electricity into heat, which is then distributed throughout the room. Electric heaters are ideal for smaller grow rooms or for maintaining a consistent temperature in a larger room.


  • Safer to use than propane heaters
  • No risk of carbon monoxide poisoning
  • No need for fuel storage or refilling


  • Less efficient than propane heaters
  • May not be suitable for heating large spaces
  • May not work during power outages

Oil-Filled Heaters

Oil-filled heaters work by heating up a special oil that circulates through the unit and radiates heat. They are often used in small grow rooms. Oil-filled heaters can provide consistent heat for extended periods of time. However, they can be expensive to purchase and run and may not be suitable for smaller grow rooms.

Radiant Heaters

Radiant heaters work by emitting infrared radiation, which heats objects directly rather than heating the air. They are easy to use and can be effective for maintaining a consistent temperature in a grow room. but their running expenses are costly compared to other heating sources. Moreover, they can be expensive to purchase and will not be suitable for larger grow rooms.

Space Heaters

Electric space heaters are the most used heater for grow tents, as they are easy to use and generally safe. They can be effective for heating small to medium-sized grow rooms and grow tents, but may not be powerful enough for larger rooms.

High-Pressure Sodium (HPS) Lights

High-pressure sodium (HPS) lights emit a lot of heat and can raise the temperature of a grow room by several degrees. While HPS lights can be effective for heating a grow room, they also consume a lot of energy and can be expensive to run.

Heat Mats

Heat mats are an affordable and eco-friendly option for maintaining a consistent temperature in a grow room. These mats extremely efficient when it comes to energy consumption. However, they are not suitable for heating grow rooms or large sized grow tents. Heat mats work best in small sized grow tents.

To sum it up, electric heaters are generally less efficient than propane heaters. They’re not ideal for heating large spaces quickly, and may not be suitable for larger grow rooms. Additionally, electric heaters rely on electricity to function, which means they may not work during power outages.

Factors to Consider When Choosing Between Propane and Electric Heaters

Size and Layout of Your Grow Room

The size and layout of your grow room are important factors to consider when choosing between propane and electric heaters. Propane heaters are better suited for larger grow rooms since they can produce more heat than electric heaters. However, if you have a small grow room or limited space, an electric heater may be more practical since it takes up less space.

Temperature Requirements for Your Plants

Different plants have different temperature requirements, and you’ll need to consider these when selecting a heating source. For example, some plants thrive in warmer temperatures, while others prefer cooler conditions.

Propane heaters are generally better for heating large spaces and can provide higher temperatures, while electric heaters are better for smaller spaces and can provide more precise temperature control.

Safety Considerations

Safety should always be a top priority when using any heating source in your grow room. Propane heaters have the potential to emit harmful gases like carbon monoxide, which can be dangerous if not properly ventilated. Electric heaters, on the other hand, do not produce any harmful gases and are generally considered safer to use.

Cost And Availability Of Fuel Or Electricity

The cost and availability of fuel or electricity are also important factors to consider. Propane heaters require propane gas, which can be expensive and may not be readily available in all areas. Electric heaters, on the other hand, require electricity, which is generally more widely available and can be less expensive than propane gas.

Environmental Impact

Finally, it’s important to consider the environmental impact of your heating source. Propane heaters produce emissions that can contribute to air pollution, while electric heaters are generally considered more environmentally friendly. However, the environmental impact of electric heaters ultimately depends on how the electricity is generated in your area.


Although propane heaters are energy efficient and can heat up large grow spaces in a short amount of time, they posses a lot of health and safety hazards like the carbon monoxide poisoning and resulting in grow tent fires.

On the other hand, there are a lot of electric heat sources that are relatively safe to use. However, it cannot be compared to propane heaters in terms of heating speed.

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