HOW TO SIZE A WAREHOUSE/LARGE SPACE HEATER TO YOUR SPACE

Properly sizing your warehouse or large space heater to your specific room size and type is an important step in optimizing comfort and reducing energy waste. A warehouse 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 warehouse heater size in watts per square foot, needed to reach a comfort room temperature of 70F.

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
(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 thermostat control preference

The type of thermostat control can impact the performance and wiring requirements of a heater. Select the option that best applies for your application.

In-Built Thermostats: Come pre-wired inside the heater and typically are the least expensive control option. In-built offers least complicated wiring requirements.

Remote Wall Thermostats: Offers more precise control of the room temperature, sensing the temperature at ground level and highly accurate electronic programmable models are available. Thermostat to be purchased separately. Not available on portable units.

Step 5. Select installation type

Decide if a portable heater that can be easily moved around at ground level or a high-mounted permanently installed heater is best for your application.

Step 6. 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 7. Enter the ceiling height, length and width of your space

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

Step 8. Purchase a heater that meets your needs.

MODELPHASEVOLTSWATTSAMPSTYPETHERMOSTAT INLUDEDREMOTE STAT PROVISION24V WIFI STAT COMPATIBLEPURCHASE
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KB2412-1-B2-ECO12401250052Garage HeaterElectronic -2 StageNot AvailableNOBuy Now
KB2412-1-ECO2S-PLUS-FB12401250052Garage HeaterElectronic -2 StageIncludedYESBuy Now
KB2412-1-P-FB12401250052.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2412-1-PLTMX-FB12401250052.1Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2412-3-P32401250030.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4812-3MP-P1-34801250026Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2015-1-B2-ECO12081500072.1Garage HeaterElectronic -2 StageNot AvailableNOContact Factory
KB2015-1-P-FB12081500072.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2015-1-PLTMX-FB12081500072.1Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2015-3-P32081500041.7Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2015-3-PLTMX32081500041.7Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2415-1-B2-ECO12401500062.5Garage HeaterElectronic -2 StageNot AvailableNOBuy Now
KB2415-1-ECO2S-PLUS-FB12401500062.5Garage HeaterElectronic -2 StageIncludedYESBuy Now
KB2415-1-P-FB12401500062.5Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2415-1-PLTMX-FB12401500062.5Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2415-3-P32401500036.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2415-3-PLTMX32401500036.1Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB4815-3MP-P1-34801500031.3Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4815-3MP-PLTMX1-34801500031.3Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2020-3-P-FB32082000055.5Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2020-3-PLTMX-FB32082000055.6Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2420-3-P-FB32402000048.2Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4820-3-P34802000024Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4820-3-PLTMX34802000024.1Unit HeaterElectronic -1 StageIncludedYESBuy Now
KB2025-3-P-FB32082500069.4Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2425-3-P-FB32402500060.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4825-3-P34802500030.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2030-3-P-FB32083000083.3Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2430-3-P-FB32403000072.2Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4830-3-P34803000036.1Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB2440-3-P-FB32404000096.3Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KB4840-3-P-FB34804000048.2Unit HeaterElectronic -1 StageNot AvailableNOBuy Now
KFUH2003-11208300014.4Unit HeaterNOIncludedYESContact Factory
KFUH2003-1-ECM1208300014.4Unit HeaterNOIncludedYESContact Factory
KFUH2404-11240400016.7Unit HeaterNOIncludedYESContact Factory
KFUH2404-1-ECM1240400016.7Unit HeaterNOIncludedYESContact Factory
KFUH2005-11208500024Unit HeaterNOIncludedYESContact Factory
KFUH2005-1-ECM1208500024Unit HeaterNOIncludedYESContact Factory
KFUH2405-11240500020.8Unit HeaterNOIncludedYESContact Factory
KFUH2405-1-ECM1240500020.8Unit HeaterNOIncludedYESContact Factory
KFUH2405-33240500013Unit HeaterNOIncludedYESContact Factory
KFUH2405-3-ECM3240500013Unit HeaterNOIncludedYESContact Factory
KFUH4805-11480500010.4Unit HeaterNOIncludedYESContact Factory
KFUH4805-3348050007Unit HeaterNOIncludedYESContact Factory
KFUH2006-11208600028.8Unit HeaterNOIncludedYESContact Factory
KFUH2006-1-2S1-ECM1208600025Unit HeaterNOIncludedYESContact Factory
KFUH2408-11240800033.3Unit HeaterNOIncludedYESContact Factory
KFUH2408-1-2S1-ECM1240800033.3Unit HeaterNOIncludedYESContact Factory
KFUH2009-33208900021.6Unit HeaterNOIncludedYESContact Factory
KFUH2009-3-ECM3208900021.6Unit HeaterNOIncludedYESContact Factory
KFUH2010-112081000048.1Unit HeaterNOIncludedYESContact Factory
KFUH2010-1-2S1-ECM12081000048Unit HeaterNOIncludedYESContact Factory
KFUH2410-112401000041.7Unit HeaterNOIncludedYESContact Factory
KFUH2410-1-2S1-ECM12401000041.7Unit HeaterNOIncludedYESContact Factory
KFUH2410-332401000024.1Unit HeaterNOIncludedYESContact Factory
KFUH2410-3-2S3-ECM32401000024.1Unit HeaterNOIncludedYESContact Factory
KFUH4810-114801000020.8Unit HeaterNOIncludedYESContact Factory
KFUH4810-334801000012Unit HeaterNOIncludedYESContact Factory
KFUH2012-332081125031.2Unit HeaterNOIncludedYESContact Factory
KFUH2012-3-2S3-ECM32081150031.2Unit HeaterNOIncludedYESContact Factory
KFUH2412-112401150047.9Unit HeaterNOIncludedYESContact Factory
KFUH2412-1-2S1-ECM12401150047.9Unit HeaterNOIncludedYESContact Factory
KFUH2412-332401150028.9Unit HeaterNOIncludedYESContact Factory
KFUH2412-3-ECM32401150028.9Unit HeaterNOIncludedYESContact Factory
KFUH4812-114801150024Unit HeaterNOIncludedYESContact Factory
KFUH4812-334801150014.4Unit HeaterNOIncludedYESContact Factory
KFUH2015-112081500072.1Unit HeaterNOIncludedYESContact Factory
KFUH2015-1-2S1-ECM12081500072.1Unit HeaterNOIncludedYESContact Factory
KFUH2015-332081500041.6Unit HeaterNOIncludedYESContact Factory
KFUH2015-3-2S3-ECM32081500041.6Unit HeaterNOIncludedYESContact Factory
KFUH2415-112401500062.5Unit HeaterNOIncludedYESContact Factory
KFUH2415-1-2S1-ECM12401500062.5Unit HeaterNOIncludedYESContact Factory
KFUH2415-332401500036.1Unit HeaterNOIncludedYESContact Factory
KFUH2415-3-2S3-ECM32401500036.1Unit HeaterNOIncludedYESContact Factory
KFUH4815-114801500031.3Unit HeaterNOIncludedYESContact Factory
KFUH4815-334801500018.1Unit HeaterNOIncludedYESContact Factory
KFUH2418-112401725071.9Unit HeaterNOIncludedYESContact Factory
KFUH2418-1-2S1-ECM12401725082.9Unit HeaterNOIncludedYESContact Factory
KFUH2418-332401725043.3Unit HeaterNOIncludedYESContact Factory
KFUH2418-3-ECM32401725043.3Unit HeaterNOIncludedYESContact Factory
KFUH4818-114801725035.9Unit HeaterNOIncludedYESContact Factory
KFUH4818-334801725020.7Unit HeaterNOIncludedYESContact Factory
KFUH2020-112082000096.2Unit HeaterNOIncludedYESContact Factory
KFUH2020-1-2S1-ECM12082000096.2Unit HeaterNOIncludedYESContact Factory
KFUH2420-112402000083.3Unit HeaterNOIncludedYESContact Factory
KFUH2420-1-2S1-ECM12402000083.3Unit HeaterNOIncludedYESContact Factory
KFUH2420-332402000048Unit HeaterNOIncludedYESContact Factory
KFUH2420-3-2S3-ECM32402000048Unit HeaterNOIncludedYESContact Factory
KFUH4820-114802000041.7Unit HeaterNOIncludedYESContact Factory
KFUH4820-334802000024Unit HeaterNOIncludedYESContact Factory
KFUH2022-332082250062.5Unit HeaterNOIncludedYESContact Factory
KFUH2022-3-2S3-ECM32082250062.5Unit HeaterNOIncludedYESContact Factory
KFUH2424-332402400057.7Unit HeaterNOIncludedYESContact Factory
KFUH4824-334802400028.8Unit HeaterNOIncludedYESContact Factory
KFUH2025-1120825000120.2Unit HeaterNOIncludedYESContact Factory
KFUH2025-1-2S1-ECM120825000120.2Unit HeaterNOIncludedYESContact Factory
KFUH2425-1124025000104.2Unit HeaterNOIncludedYESContact Factory
KFUH2425-1-2S1-ECM124025000104.2Unit HeaterNOIncludedYESContact Factory
KFUH4825-114802500052.1Unit HeaterNOIncludedYESContact Factory
KFUH2030-1120830000144.2Unit HeaterNOIncludedYESContact Factory
KFUH2030-1-2S1-ECM120830000144.2Unit HeaterNOIncludedYESContact Factory
KFUH2030-332083000083.3Unit HeaterNOIncludedYESContact Factory
KFUH2030-3-2S3-ECM32083000083.3Unit HeaterNOIncludedYESContact Factory
KFUH2430-1124030000125Unit HeaterNOIncludedYESContact Factory
KFUH2430-1-2S1-ECM124030000125Unit HeaterNOIncludedYESContact Factory
KFUH2430-332403000072.2Unit HeaterNOIncludedYESContact Factory
KFUH2430-3-2S3-ECM32403000072.2Unit HeaterNOIncludedYESContact Factory
KFUH4830-114803000062.5Unit HeaterNOIncludedYESContact Factory
KFUH4830-334803000036.1Unit HeaterNOIncludedYESContact Factory
KFUH2435-1124034500143.8Unit HeaterNOIncludedYESContact Factory
KFUH2435-1-2S1-ECM124034500143.7Unit HeaterNOIncludedYESContact Factory
KFUH2435-332403450082.9Unit HeaterNOIncludedYESContact Factory
KFUH2435-3-2S3-ECM32403450082.9Unit HeaterNOIncludedYESContact Factory
KFUH4835-114803450071.9Unit HeaterNOIncludedYESContact Factory
KFUH4835-334803450041.5Unit HeaterNOIncludedYESContact Factory