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Top 10 Best Grow Room Heaters for Optimal Plant Growth

If you cultivate cannabis indoors, you're likely aware of the critical role that maintaining optimal temperature plays in the success of your grow room. Investing in a high-quality grow room heater can aid in promoting the health and growth of your plants, particularly during colder months.

To assist you in selecting the ideal heater, we've compiled a guide outlining factors to consider and a list of the top 10 grow room heaters currently available on the market. Discover the perfect heating solution for your indoor cannabis grow room today!

To begin, let's establish what exactly a grow room heater is.


Grow Room Heater

A grow room heater is an essential tool for cannabis growers. With the right extended room heater, you can maintain optimum plant temperature conditions, promoting healthy growth and increasing yields. Grow room heaters come in several types, including electric, propane, and natural gas heaters.

Electric Grow Room Heater

Electric grow room heaters are a preferred option for indoor cannabis cultivators due to their smokeless and odorless operation, making them a great fit for enclosed spaces.

In addition to being energy-efficient and noise-free, they are user-friendly. The most suitable electric grow room heaters for cannabis growers are those with adjustable thermostats that offer precise temperature regulation.

Propane Grow Room Heater

Propane grows room heaters are another popular option for cannabis growers. They are efficient and provide a clean source of heat. However, they do emit some fumes, so proper ventilation is required. Also, propane heaters require a propane tank, which is unsuitable for small grow rooms.

Natural Gas Grow Room Heaters

Natural gas grows room heaters are an excellent choice for large grow rooms. They are highly efficient and provide an easily adjustable source of clean heat. However, they require gas lines and proper ventilation, which is unsuitable for small or indoor grow rooms.

Ceramic Heater

A ceramic grow room heater is usually ideal for small spaces or areas. Thanks to the heating element of PTC, it can quickly warm up a room.

Oil-filled Heater

An oil-filled heater runs on both electricity and oil. It warms the air with oil-filled fins and consumes less electrical energy. In this type of heater, oil is considered a heat reservoir to generate the heat the grow tent requires.

Benefits of Grow Room Heaters

A grow room gives you more control over growing conditions. But most of the time, the temperature of the space surrounding your grow room may fluctuate, affecting the results of your crops.

Be especially careful when temperatures drop and get too cold, which can cause serious trouble for your plants. When plants are warmed above 60°F (15°C), the plants are stressed and more susceptible to mold and fungus.

Grow room heaters allow for greater control over the growing environment. The heat protects your plants from sudden drops in temperature that can affect crop growth.

A heater is an excellent option for your grow room if your grow room does not require additional heat entry. Because your grow lights will emit enough heat, especially if you live in an area where colder climates occur more often.

Now that you have some knowledge about grow room heaters, the next step is to know how to choose the right heater for your grow room to maintain its temperature.

How to Choose the Right Grow Room Heater

Determine the Size of the Grow Room

Whether to determine the size of the grow room will also affect the selection of grow room heaters. Different grow room sizes are suitable for different heaters. Measure the grow room's length, width, and height and calculate the total cubic feet. This will show you how much heating power your space requires.

Select the Right Type of Heater for Your Plants

When choosing a grow room heater, there are several types to consider. Some popular options include ceramic heaters, oil-filled heaters, and radiant heaters.

Ceramic heaters are a good choice for small to medium-grow rooms, while oil-filled heaters are better for larger spaces. Radiant heaters are ideal for providing targeted heat to specific areas of a grow room.

Consider your grow room size and the particular needs of your plants when choosing the right type of heater for optimal growth.

Consider Safety Features and Energy Efficiency

When choosing a grow room heater, it is essential to consider safety features and energy efficiency. Look for heaters with an automatic shutoff feature in case they overheat or tip over. This prevents fire and other hazards.

Also, choose a heater with energy-saving features to help reduce energy costs. By prioritizing safety performance and energy efficiency, you can ensure your cannabis crops are thriving and safe.

Look for Adjustable Temperature Settings

Another factor to consider when choosing a heater for a grow room is that the heater must have adjustable temperature settings.

Cannabis has different temperature requirements at different stages of growth, so having a controlled adjustable temperature feature will help ensure your plants get the right amount of heat. You can help plants thrive and achieve optimal growth with the correct temperature settings.

Read Reviews and Compare Prices Before Buying

Before buying your desired heater online, be sure to read the reviews under the product and compare the prices of different brands to ensure you get your money's worth. Look for feedback from other cannabis growers who are already using the heater you are currently considering buying about its performance and reliability.

You can also compare prices between different heater retailers to find the best deal. Keep in mind that the cheapest option may not always be the best, as it may have the traits or qualities needed for optimal plant growth.

A high-quality grow room heater is the best way to regulate temperature. We will show you the top 10 best grow room heaters!

Top 10 Best Grow Room Heaters

1. Vornado MVH Vortex Heater

This compact yet powerful heater is designed for small to medium-grow tents and rooms. It is energy efficient and operates quietly without interrupting the plant's growth cycle. In addition, the Vornado MVH Vortex Heater features a unique airflow system that heats room air quickly and efficiently.

While this is an affordable model, it offers a range of valuable features, including a safety switch that activates if the unit is tipped over or starts to overheat. It also has a cool look and a handle for easy portability even when in use.

This device includes three distinct heat settings and three silent heat settings (Low/750W, Medium/1125W, High/1500W), which provide flexibility to balance heat output and energy usage. Nonetheless, although the unit incorporates a built-in thermostat, it lacks a digital display, requiring users to employ it as a thermometer.

2. Dr. Infrared Heater

This heater has an excellent reputation among cannabis growers. The Dr. Infrared Heater is designed to provide even heat distribution, and the ceramic heating elements ensure that the room is heated quickly and efficiently. The best part? It's energy efficient too!

3. Honeywell EnergySmart Electric Heater

This is ideal for large grow rooms. In addition, Honeywell EnergySmart Electric Heaters use a programmable thermostat to keep the temperature in the room constant.

It features an adjustable thermostat and two heat settings so you can quickly achieve the ideal temperature to support the growth of your cannabis plants. A 360-degree tip-over switch and overheat protection ensure safety, and the cool-touch carry handle provides safe, easy transport. This product's simple-to-read LCD and touch-screen control panel enable straightforward usage at an affordable cost.

Its energy-conserving features render it a highly efficient option for those aiming to reduce their electricity expenses.

4. Optimus Prime Portable Heater

This small but powerful heater is an excellent option for those with limited space. The Optimus Portable Heater is extremely energy efficient and features an adjustable thermostat and a safety tip-over switch. It heats quickly and evenly, making it a popular choice for cannabis growers.

5. DeLonghi Mica Panel Heater

If you're looking for a grow room heater that won't dry out the air in your grow room, the DeLonghi Mica Panel Heater is a great option. This warmer features mica panels that dissipate heat evenly without drying out the air, ensuring your plants have the best possible growing environment.

This heater can effectively maintain the temperature in a medium or large room, giving you peace of mind! With a seating capacity of 1500 watts, this product makes it effortless to sustain your desired indoor temperature. Meanwhile, an adaptable thermostat allows you to establish a comfortable atmosphere for all occupants. It also has a wheel for easy transport.

However, the heater does not display an accurate temperature, and you may get burned if you touch the heat sink.

6. Lasko MyHeat Personal Heater

This is ideal for small or freestanding grow rooms where you only need to heat a small space. The Lasko MyHeat Personal Heater is compact and easy to use while providing instant heating. It's also energy efficient and affordable.

7. TaoTronics PTC Space Heater

With its advanced PTC (Positive Temperature Coefficient) heating system, the TaoTronics PTC Space Heater is an excellent choice for those who want a heater that can heat a large grow room. It is energy efficient and has a digital thermostat for precise temperature control.

8. Heat Storm HS-1500-ILODT Infrared Heater

If you're looking for a heater that only takes up a little space, the Heat Storm HS-1500-ILODT Infrared Heater is a great choice. It produces plant-safe infrared heat, and its compact size makes it ideal for small grow rooms.

9. Mr. Heater F232000 Portable Radiant Heater

This heater is popular with those who need to heat an outdoor grow room or greenhouse. In addition, the Mr. Heater F232000 Portable Radiant Heater runs on propane fuel, making it a popular choice for those who don't want electricity to heat their grow room.

This product is specially designed for large-area cultivation. It can be used indoors and in outdoor growing spaces, covering up to 450 square feet.

High, medium, and low heat options allow for consistent temperatures. In addition, it has an ODS system that detects low oxygen levels and automatically shuts off when detected.

10. Dyson AM09 Air Heater

This innovative heater uses unique air multiplier technology to ensure even heat distribution throughout the room. As a result, the Dyson AM09 air heater heats up quickly, and its adjustable thermostat keeps the temperature consistent.

Based on the above references, choosing the right heater for your grow room is wise.

How to Use the Grow Room Heater

Know Your Ideal Temperature Range

Cannabis plants have specific temperature requirements for efficient growth and flowering. During the plant growth phase, the ideal temperature range from 71 and 82 degrees Fahrenheit. During flowering, the temperature should be between 68 and 79 degrees Fahrenheit.

The temperature must be consistent, so use a thermostat to maintain the ideal temperature range.

Correct Placement of the Heater

Heaters should be accurately positioned within the growth chamber to distribute heat evenly. It should be placed away from the plants to avoid burning and should not be blocked by anything.

Also, don't place heaters near moisture sources, such as hydroponic equipment or plumbing.

Safety Precautions

Safety precautions are of the utmost importance when operating grow room heaters. It is crucial to ensure that the heater does not come into contact with any flammable objects and that there is ample space surrounding it to prevent overheating.

Additionally, it is important not to leave the heater operating when the room is unoccupied and to exercise caution not to overload electrical outlets.

Maintenance and Cleaning

To keep your grow room heater running correctly, maintain and clean it regularly. In order for the operating efficiency of the heater to be maintained, it is essential to clean the vents and dust accumulated on its exterior.

Additionally, it is recommended to inspect the cords and plugs for signs of wear regularly and replace them promptly if required.


Finding the perfect grow room heater is essential for cannabis growers to ensure optimal plant growth. Whether you have a small or large grow room or need to heat your outdoor greenhouse, there is a heater.

You should follow proper safety guidelines and ventilation requirements, no matter which heater you choose. Using the right grow room heater can maintain optimal temperature conditions and promote healthy plant growth.


1. What is the best way to heat a grow room?

The best methods include using heaters, fans for airflow, digital thermostats, proper insulation, reflective materials, and heating mats for seedlings.

2. Can a grow room be too hot?

Yes, excessive heat (above 85°F or 29°C) can harm plants, causing heat stress, reduced growth, lower THC production, and increased pest risks.

3. How can investing in a high-quality grow room heater help with this?

Investing in a quality heater provides precise temperature control, energy efficiency, safety features, promotes plant health, and allows for automation, ensuring optimal conditions for cannabis growth.

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