Electrical Enclosure Heater Sizing

The wattage of the heater you need is determined by the total surface area of your enclosure and the temperature rise you need to produce.

Electrical enclosure heater sizing.

An enclosure heater from grainger helps to protect mechanical electrical and electronic equipment from freezing condensation and corrosion. Once you make your calculations you can decide on the best choice for a type of heater and how many btus british thermal unit the standard heat measurement you need. To heat an area like an outbuilding or new building you must calculate what size heater you need. Larger enclosures often require fan heaters to distribute the heat throughout the enclosure.

Depending on what s in the cabinet it can cause larger problems. For localized heat in a large enclosure place them near batteries and other parts that don t work well in the cold. Find your enclosure s total surface area by entering its dimensions here. Rely on nvent hoffman s full portfolio of enclosure heater solutions to help maintain stable temperatures for your equipment.

Five steps to determine heating requirements calculations to determine the required heater size include the following five steps. Exterior dimensions of enclosure insulation thickness and type required temperature minimum ambient temperature internal heat source i e. Cabinet enclosure heater sizing. Protect your critical enclosure assets from the harmful effects of low temperatures condensation and corrosion.

Choose from a wide range of capacities power inputs mounting options sizes and type ratings. Saginaw control and engineering. How to calculate heater size. Start with the surface area measure the height width and depth of your enclosure.

Electrical current draw of panel components heat loss voltage. This calculator has a maximum temperature rise of 140 f or 78 c step 1. 9 42 data subject to change without notice 763 4222211 fax 763 422 2600 2003 hoffman enclosures inc. Enclosures less than 100 ft2 surface area conservative values for heat loss are as shown in the table below.

Generally heaters over 150 watts will include an axial fan to move the heat throughout the enclosure. Tubular low profile finned strip silicone rubber panel radiant and fan driven enclosure heaters feature thermostatic controls designed to maintain stable enclosure temperatures. An improperly sized cabinet enclosure heater can damage your electrical components and cost you in repairs.