Electric Heat Formula

To heat an area like an outbuilding or new building you must calculate what size heater you need.

Electric heat formula.

Calculations for circulation heater applications. 120 208 220 230 240 277 440 460 480. Volts x 1 73 applied vs. However because the heat content of natural gas varies from day to day and hour to hour and fuel oil from tank to tank the temperature rise method should only be used to get the airflow close to the manufacturer s recommendation and cannot be used for ac system capacity verification.

An electric stove consumes 5 mj of energy from a 230 v power supply when turned on in 60 minutes. The power rating energy per unit time of the stove can be calculated as. C q mδt q is the amount of supplied or subtracted heat in joules m is the mass of the sample and δt is the difference between the initial and final temperatures. P 5 mj 10 6 j mj 60 min 60 s min 1389 w 1 39 kw.

Volts line current 3 phase amps kw x 1000. The formula for specific heat looks like this. 3160 line current 1 phase amps kw x 1000. Sizing your heaters properly helps to ensure your home maintains a comfortable temperature regardless of fluctuations in weather.

The electrical load of an appliance such as a heater is the current drawn by the appliance while it is switched on. How to calculate electric loads for basebord electric heaters. 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. Installing electric baseboard heating is often the easiest and most effective way to add heating to a room addition or when you are converting an unheated space such as an attic or basement ideally it s always best to extend existing ductwork from your central furnace air conditioning system but sometimes it s just not possible to route additional ductwork.

The temperature rise method may be used for fossil fuel and electric furnaces. Determining the size and quantity of baseboard heaters required for your space involves calculating the size of the space determining how well insulated the space is and then plugging those values into a formula. Joule heating also known as resistive resistance or ohmic heating is the process by which the passage of an electric current through a conductor produces heat. Heat capacity is measured in j kg k.

The current can be calculated. It is also. Electric heater formulas conversion 1 kw 3413 btu load requirement kw cfm x temp. Energy to heat water.

This equation is based on the criteria that there is no vaporization occurring in the heater. Rated kw factors rated voltage applied voltage.