How Many Btu To Heat Garage

Step 1 calculate the total square footage of your garage by measuring the length and width with a tape measure and multiplying the figures.

How many btu to heat garage. As an example a 15 x 20 foot garage would have an area of 300 square feet. A basic rule of thumb for forced air heaters is 45 000 btu to heat a two to 2 1 2 car garage and a 60 000 btu garage heater for a three car garage. Many other heating options portable electric baseboard heaters can provide an energy efficient source of warmth for smaller garages with a convenient low profile.

You need a heater with at least a 21 780 btu output. For this step you ll need to determine how well the garage is insulated to get the last variable for the equation. If the temperature outside is 30 f and you d like it to be 70 f in your garage the desired temperature change is 40 f.

Calculating the required btu for heating or cooling your garage will ensure you purchase an adequate unit to address your needs. Find a heater with a btu output that matches your results. Those two numbers multiplied by 133 reveals you ll need a little more than 42 500 btus per hour to keep your workspace at 70 degrees.

Insulation quality x total cubic feet x desired heat rise 1 6 btu required.