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"Choosing your new Greenhouse just became easier with the EasyGrow Greenhouse Kit!"

Heating Your Easy Grow Greenhouse - BTU Calculator

Explanation: This calculator is designed to give an estimate of the BTU (British Thermal Unit) heating needs of a greenhouse. Simply enter the area to be heated and select the climate adjustments. This is to be used for a general guideline only.

	Greenhouse Area - The total square feet of exposed surface area of your greenhouse not including the floor (this is not length * width). To find out the area your greenhouse, click here.
	Coldest Outside Temperature - You will want to enter the lowest temperature expected for your area. Not sure? You can click here for the USDA plant hardiness zones which provide an average annual temperature rating for areas within the United States.
	Maximum Inside Temperature - This is the highest temperature you want to maintain in your greenhouse.
	Heat Loss Value - The Easy Grow heat loss value for the 4mm polycarbonate covering is 0.70. Check the list below to find the heat loss value for the covering used on your greenhouse. Some values may vary with manufacturer. If you know the R-value of your covering, you can convert it to a heat loss value using this formula: Heat loss value = 1 / R-value.

Resulting Minimum BTU - This is the minimum BTU output your heater should have. Most heaters use a BTU input rating. BTU output = (heater efficiency) * (BTU input).
This result is Area x (Max - Min) x Heat Loss

This heating calculator provided by Greenhouses.com - The gardening & greenhouse information resource.

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