10 Best Greenhouse Heaters for Cold Climates That Support Plant Growth

As winter’s chill sets in, keeping your greenhouse warm becomes crucial for thriving plants. Choosing the right heater can make all the difference in maintaining optimal growth conditions. Discover the best greenhouse heaters designed specifically for cold climates, ensuring your plants stay cozy all season long.

Best Greenhouse Heaters For Cold Climates

1. Electric Heaters

Electric heaters are popular for maintaining stable temperatures in greenhouses. They’re easy to install and often have thermostats for better control. Consider models like the Camelot 1500W or EcoSmart 500W for efficiency.

1. Propane Heaters

Propane heaters provide powerful warmth and can heat larger spaces effectively. The Mr. Heater F274805 is a great option for medium-sized greenhouses, but you’ll need good ventilation to avoid gas buildup.

1. Natural Gas Heaters

If you have a natural gas line available, natural gas heaters can be a cost-effective solution. The Dyna-Glo natural gas heater offers even heating and is suitable for larger greenhouses.

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1. Infrared Heaters

Infrared heaters warm objects rather than the air, which can be beneficial in maintaining consistent temperatures. The Dr. Infrared Heater series offers various wattages to fit your greenhouse size.

1. Wood-Burning Heaters

Wood-burning heaters can create a rustic charm while providing reliable heat. They’re great for those who have access to firewood, but they require more maintenance, like regular cleaning and wood supply management.

1. Heat Mats

Using heat mats for seed starting inside your greenhouse can help boost germination rates. They maintain a consistent temperature under plant trays, particularly useful during colder months.

When choosing a heater, always account for the specific size of your greenhouse and the average temperature drops in your region. Implementing insulation measures, like bubble wrap or thermal curtains, can also enhance efficiency in keeping your greenhouse warm.

Types Of Greenhouse Heaters

Choosing the right greenhouse heater is crucial for maintaining optimal temperatures during cold months. Here are the main types of heaters to consider based on your greenhouse size and heating needs.

Electric Greenhouse Heaters

Electric greenhouse heaters are popular for their energy efficiency and controllable heat output. These heaters are perfect for small to medium-sized greenhouses. They often include features like thermostats and fans to distribute heat evenly. They don’t emit fumes, which enhances safety and reduces maintenance efforts. Notable models include the Dreo Space Heater, providing 1500W output with precise temperature control, or the smart Govee Electric Space Heater, known for easy installation and user-friendly features.

Gas Greenhouse Heaters

Gas greenhouse heaters offer a cost-effective solution with high heat output, making them suitable for larger greenhouses. Using natural gas can lower heating bills while providing consistent warmth during frigid weather. These systems typically require a gas line and proper ventilation to ensure safety. If you’re considering scaling up, gas heaters can offer powerful heating to support your plant growth.

Propane Greenhouse Heaters

Propane greenhouse heaters are ideal for flexibility and portability. They’re especially useful if you don’t have access to natural gas lines. These heaters can quickly heat a space, making them suitable for temporary setups or mobile greenhouses. Look for models with safety shut-off features and adjustable settings to optimize your fuel usage. Brands like Mr. Heater are popular for their reliability in cold climates.

Wood-Fired Greenhouse Heaters

Wood-fired greenhouse heaters provide a rustic charm while being a sustainable option for heating. These heaters burn wood, a renewable resource, making them appealing if you’re focused on eco-friendly practices. However, they require more maintenance and monitoring, including regular wood supply and ash disposal. You might find success with simple designs, like the Rocket Mass Heater, which can efficiently heat a greenhouse while minimizing wood waste.

Features To Consider In Greenhouse Heaters

When choosing a greenhouse heater, you must consider specific features to ensure it meets your needs and provides efficient warmth during cold months.

Heating Capacity

Choose a heater with the right heating capacity to maintain warmth in your greenhouse. For instance, electric heaters like the PELONIS PHTA1ABB can warm areas up to 160 sq. ft. with 5,118 BTU/hr, ideal for smaller spaces. Gas heaters, such as the Mr. Heater Big Buddy, can heat up to 450 sq. ft. with an output of 18,000 BTU/hr, making them suitable for medium to large greenhouses. Always match the heater’s capacity to the space you’re heating.

Energy Efficiency

Prioritize energy-efficient heaters to save on operational costs. Look for electric models with thermostats to regulate temperatures automatically and reduce energy consumption. For example, many propane heaters offer high efficiency, heating larger areas without requiring constant fuel refills. Energy-efficient options not only save money but also lessen your environmental impact.

Safety Features

Safety is crucial in greenhouse heaters. Opt for models with safety shut-off features, such as tip-over switches or overheat protection. Gas heaters may require ventilation; check for built-in safety measures to prevent gas buildup. Evaluating safety features safeguards your plants and enhances your personal safety while working in the greenhouse.

Durability and Warranty

Select heaters known for durability, especially those designed for outdoor use. Models made with weatherproof materials tend to last longer in challenging conditions. Additionally, look for products with a solid warranty, typically ranging from one to three years. This warranty acts as a safety net, assuring you of the heater’s quality and the manufacturer’s commitment to customer satisfaction.

Top Picks For The Best Greenhouse Heaters For Cold Climates

Best Overall Greenhouse Heater

The PELONIS PHTA1ABB Portable Space Heater stands out for its superb balance of performance and efficiency. This unit emits 5,118 BTU/hr, covering spaces up to 160 sq. ft. You’ll appreciate its adjustable thermostat and effective fan for improved air circulation. Key safety features like overheating protection and a tip-over switch provide peace of mind. Embrace PTC technology’s benefits, which ensure quick and energy-efficient heating.

Best Budget-Friendly Greenhouse Heater

For an economical option, consider the DIY Terracotta Pot Heater. Simply place tea light candles in a metal tray, then cover them with an inverted terracotta pot. This setup captures and radiates heat effectively, providing warmth to the surrounding area while being budget-friendly. It’s a perfect example of resourcefulness, illustrating how a simple concept can meet your greenhouse heating needs without breaking the bank.

Best High-End Greenhouse Heater

The EcoPlus 8 Inch Inline Duct Fan serves as a high-end solution, ideal for maintaining warm conditions in larger greenhouses. This model helps with air circulation and heat distribution, featuring a durable metal housing built to withstand tough greenhouse environments. With its efficient performance, you can ensure an even temperature throughout your growing space, allowing your plants to thrive even in the coldest weather.

Best Greenhouse Heater For Large Spaces

For substantial greenhouses, the Fiore 20000 BTU Propane Heater shines. Designed for larger areas, this heater provides robust heating with its 20,000 BTU output. Its portability allows you to easily position it where needed. With low operating costs and a simple setup, you’ll find it meets your needs without complicating your winter gardening tasks. This heater is invaluable when dealing with frigid conditions.

Tips For Using Greenhouse Heaters Effectively

Proper Placement Of Greenhouse Heaters

Placing greenhouse heaters in the right spots makes all the difference in ensuring even heat distribution. Position heaters near plants that are most sensitive to temperature fluctuations, such as seedlings and flowering plants. Avoid corners, as they can lead to cold spots. Utilize hangers or stands to elevate the heaters, creating a more efficient air flow. Having heaters directed away from walls and plants can also prevent overheating and minimize moisture buildup.

Insulating Your Greenhouse

Insulation is crucial for maintaining a stable temperature within your greenhouse. Consider adding thermal blankets or bubble wrap to the interior walls during winter months to improve heat retention. Replace or repair any damaged sealants around doors and windows to reduce drafts. Using insulating materials like polycarbonate panels can also help regulate temperatures inside. Remember to check for leaks, as even small openings can significantly impact heating efficiency.

Monitoring Temperature Levels

Regularly monitoring your greenhouse temperature ensures that your plants thrive in comfortable conditions. Utilize a digital thermometer or a remote monitoring system to track temperature fluctuations throughout the day. Aim for daytime temperatures between 65°F and 75°F and nighttime temperatures no lower than 50°F to promote healthy growth. Adjust your heating system as needed to maintain these levels, making sure to account for external weather changes that may affect your greenhouse’s internal climate.

Conclusion

Choosing the right greenhouse heater is essential for thriving plants in cold climates. By understanding your greenhouse’s specific needs and evaluating the various heating options available, you can create a comfortable environment for your plants.

Whether you opt for an electric heater for efficiency or a propane model for powerful warmth, each choice offers unique advantages. Don’t forget to consider insulation and heater placement to maximize effectiveness.

With the right heater and a little planning, you can ensure your greenhouse remains a sanctuary for your plants all winter long.