Why Size and Efficiency Matter for Greenhouse Heating Systems

Greenhouse HVAC system | Modine

Year-round production of plants is not the least of the many benefits of greenhouse growing. However, with the cooler season on the horizon, greenhouse growers are faced with the critical question of how to keep their crops safe and thriving through the winter months. Though they offer a controlled environment, it may not be enough to withstand the frigid temperatures.

Identifying the right type and size of heater will make all the difference in maintaining optimal temperatures, ensuring plant health, and maximizing energy efficiency throughout the winter months.

Choosing the Right Heater

With a wide variety of heating systems available, it’s crucial to select one that meets your specific heating requirements to create the ideal environment. Though there are plenty of options on the market to choose from, there are several important things to consider when choosing a heating system for a greenhouse.

• Energy efficiency: Opt for energy-efficient heating models to lower operating costs and reduce environmental impact.
• Emissions: Select heaters with low emissions and advanced control technologies to protect your plants and the environment.
• Safety: Ensure the heater you select complies with all safety standards.
• Heater size and capacity: Ensure the heater has the capacity to maintain your desired greenhouse temperature.
• Climate and growing needs: Tailor your heating system to match your crops’ requirements and local climate conditions.

Efficiency is likely at the top of the list for most growers so opting for a high-efficiency unit heater would be a good choice. Some unit heaters can achieve up to 97% thermal efficiency, significantly reducing energy costs and CO₂ emissions. These heaters are also simple to install due to their compact designs, often allowing them to be mounted to save floor space.

Certain models come equipped with energy-saving features that cut off the gas to the burners if the temperature around the unit exceeds , ensuring that the main fan circulates the warm air downward.

Size Matters

Not all heating units are built the same, nor does each one fit and operate the same. Accurately sizing a greenhouse heating system is essential for boosting heating capacity and maintaining ideal and consistent temperatures throughout the greenhouse.

A properly sized unit can enhance efficiency within your greenhouse. If the unit is too small, it may result in prolonged heating cycles, potentially endangering your plants. Conversely, an oversized unit could lead to short cycling as the space may heat up too quickly.

Another major concern when using a unit that is too large is efficiency. Data provided by the EPA suggests that space heating accounts for about 36% of energy use in U.S. commercial spaces, so having the right size is very important.

To determine the right size, consider the temperature you aim to maintain, the size of the area, and the typical winter temperatures. This process requires growers to take a few measurements and perform some calculations. Once these figures are determined, growers will be well-equipped to effectively heat their greenhouses. Work with a licensed contractor to make these calculations and to determine the right size.

Ensuring Optimal Heating

Preparing your greenhouse for the cooler months shouldn’t be an afterthought. Choosing the right size heater for your commercial greenhouse is not just a matter of efficiency – it’s a critical factor in ensuring the health and growth of your crops vulnerable to the cold.

Having the proper heating solution in place to create the desired atmosphere is a necessity. By carefully assessing your greenhouse’s specific needs and consulting with a professional, you can find the right heater that will provide consistent, optimal temperatures year-round. The right size heater makes all the difference in creating a thriving, productive growing environment.