HOW TO SIZE A PORTABLE HEATER FOR A SPACE

Properly sizing your garage heater to your specific room size and type is an important step in optimizing comfort and reducing energy waste. A garage heater that is too large for the space will not heat the space more quickly.

A heater that is too large for the room will continue to heat for an extended period of time beyond the temperature set point, wasting energy. We call this a temperature swing. Alternatively, a heater that is too small will run for a longer period of time than would be necessary with a properly sized heater.

Use the below  easy steps to calculate the optimal garage heater size in watts per square foot.

Step 1. Select the heating zone your space is located in

Heating Zones Zone 1 Zone 1 Zone 2 Zone 3 Zone 4

Step 2. Select the voltage required for your heater
(120V, 208V, 240V, 277V or 480V)

If you’re replacing an old heater, the new heater needs to be the same voltage. Check the product label of the old heater for the correct voltage rating.

For a new installation check your supply voltage with a voltage meter or consult with a licensed electrician. We generally recommend a 240 volt heater and installing a new, dedicated 240 volt circuit for the heater.

NEVER ASSUME you know the right voltage. Be 100% sure you’re getting the correct voltage heater.

Step 3: Select a Single-Phase or Three-Phase Heater

If you’re replacing an old heater, the new heater’s phasing should match. Check the product label of the old heater to verify the phasing.

In general Residential homes are served by a single-phase power supply, while commercial and industrial facilities usually use a three-phase supply.

Step 4. Select the insulation values that best describes the insulation used in your space

CoveHeater Application Insulation

* Insulation is rated for a specific R-Value, which is the industry standards for insulation effectiveness.

Step 5. Enter the ceiling height, length and width of your space.

Ceiling Height (ft) Length (ft) Width (ft) Square Feet
Watts Per Sq. Foot Approximate Wattage Needed Recommended Heaters

Step 6. Purchase a portable heater that meets your needs.

MODELPHASEVOLTSWATTSAMPSTYPEPURCHASE
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