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Greenhouse Heaters Buying Guide

Greenhouse heaters are worth the investment in the long run. They play an important role by providing plants with the warmth that they need especially in winter when temperatures drop. So if you're considering a greenhouse heater, don't think twice about getting one.

If you've been looking into greenhouse heaters, I'm sure you've noticed a lot of conflicting information out there which makes it difficult to sort through and make sense of it all. But don't worry, this guide will give all the facts about the different options for heaters and help you choose the right one for your needs.

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    SECTION 1: Factors to Consider When Choosing the Best Greenhouse Heaters

    While impulse buying can be fine for some purchases, it's not the best approach for something very important like a greenhouse heater. You may end up with something that is not the best fit for your greenhouse. Here are factors to consider when choosing a greenhouse heater

    • Power source

    The power source is the first thing you should consider when choosing a greenhouse heater. It is what provides the energy that is needed to heat the greenhouse. Without a power source, the heater wouldn't be able to do its job. Some common power sources for greenhouse heaters are electricity, propane, and natural gas. Each of these has its pros and cons.

    For instance, natural gas and propane are both affordable, however, they may not be available in all areas. On the other hand, electricity is a widely available and efficient energy source that could save money in the long run. But, for someone with a limited budget, it may not be the most cost-effective option.

    • Size of your greenhouse: 

    A general rule of thumb is that a small greenhouse will require less BTUs (British Thermal Units) of heat than a large greenhouse.  If you have a small greenhouse, you'll need a heater with a lower BTU rating because if you choose a heater that has a higher rating, it may be too powerful and damage your plants. 

    In the same way, if you have a large greenhouse, you'll need a heater with a higher BTU rating to produce enough heat to warm the entire space. So in short, the higher the BTU rating of a heater, the more heat it produces. The lower the BTU rating of a heater, the less heat it produces.

    • Special Features: 

    If you want a more convenient greenhouse heater, you might want to consider a model that has more of the features. It will be beneficial for you and your plants. Some heaters are very basic. They don't have special features like programmable thermostat, timer, automatic ventilation, etc

    Heaters that have features like a built-in timer and thermostat are a bonus especially if you have a busy schedule and can't constantly monitor the conditions in your greenhouse. You can simply program the timer to turn the heater on and off at specific times. On the other hand, a thermostat will allow you to set the desired temperature for your greenhouse.

    SECTION 2: Best Greenhouse Heaters

    Let's look at the best greenhouse heaters available in the market. This list will be grouped in a logical and easy-to-understand way. We'll start by looking at the best electric greenhouse heaters, and then move on to the best non-electric greenhouse heaters. For each type of heater, we'll break it down by greenhouse size to make it easier for you to find the right option for your needs.

    (i) Best Electric Greenhouse Heaters

    Dr. Heater DR218-1500W Greenhouse Heater

    The Dr. Heater DR218-1500W is a powerful and efficient greenhouse heater that uses infrared heating technology to warm up the greenhouse. It is portable and can be used in small to medium-sized greenhouses. It has several useful features including an adjustable thermostat and precision temperature sensor with a built-in over-heat protection that automatically shuts off the heater if it starts to overheat.

    Bio Green PAL 2.0/USDT Palma Greenhouse Heater

    Bio Green Palma heater can effectively heat an area of up to 120 square feet, which is perfect for a small to medium-sized greenhouse too. It has a digital thermostat for precise temperature control and the overheating protection that helps prevent the heater from getting too hot. Additionally, it comes with a 2-year warranty, which is a great benefit.

    Comfort Zone CZ220 5000-Watt

    The Comfort Zone CZ220 is a fan forced heater which is ideal for a large greenhouse. This heater distributes heat more evenly around the space, and with 5000 watts of heating power it is capable of producing a significant amount of heat. Furthermore, it also features a dual-knob control, which allows you to easily adjust the temperature and fan speed. 

    (ii) Best Non-electric Greenhouse Heaters

    Mr. Heater is one of the best brands for non-electric greenhouse heaters. They offer a variety of models with different BTU ratings, so you can find the perfect heater for your needs. 

    Mr. Heater Little Buddy, Buddy, & Big Buddy Heaters

    These three Mr. Heater products are all propane heaters. The main difference is in their heating capacity. The Little Buddy has a heating capacity of 3800 BTUs and is suitable for spaces up to 95 square feet.

    The Buddy heater has a heating capacity of 4000-9000 BTUs and is designed for heating enclosed spaces up to 225 square feet. Then, Mr. Heater Big Buddy heater has a heating capacity of up to 18,000 BTUs which is a good option to heat up to 450 square feet.

    These heaters have a variety of features that make them safe and easy to use. They have tip-over safety shut-off switches, which will turn off the heater if it's knocked over. Additionally, they also have oxygen depletion sensors, which will automatically shut off the heater if the oxygen levels in the room drop too low. 

    Dura Heat LPC25 15-25,000 BTU Propane (LP) Convection Heater

    The Dura Heat LPC25 is a convection heater that can be set to either 15,000 BTUs or 25,000 BTUs. It is a great option for heating large greenhouses. It has a thermostat control with two heat settings, and it's designed to run for up to 14 hours on a single tank of propane. It also has a tip-over safety switch and an automatic shut-off feature just like the Mr. Heater products.


    After reading this guide, I hope you have a better idea of the greenhouse heater that's right for your needs. If you have any questions, don't hesitate to leave a comment below. 

    Thanks for reading!


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