Electric heaters have been around for decades as a source of heat in homes to provide warmth to us. One of the reason for their popularity is because of lower cost to purchase and easy maintenance compared to other sources of heat. They are usually powered by electricity though a small percentage are still using propane or kerosene as fuel.
They work by converting electricity into heat using metals as heating elements. The metals have high resistance that permit a certain amount of current to flow though them to provide the required heat. Electrical energy is changed into heat energy and the the relationship between the wattage and Btu/hr is:
1 Watt = 3.415 Btu/hr.
There are three types of electric resistance heating wires that are in used today:
One of the commonly used natural convection heating equipment is known as Baseboard Heating Unit. This unit has electrical resistance mounted in a casing which is designed to move air over the elements naturally. They are usually mounted under the window on the wall.
When purchasing units, make sure that they have safety features such as wire grills, automatic shutoff controls in the event of overheating, tilt switches and good thermostat controls. Look for certification on the units such as UL or CE Mark.
Pro and Cons of Using Electric Heater
The advantages of using electric HTRs are:
The disadvantages of using electric HTRs are:
Visiting HVAC events and trade shows are one of the best way to equip yourself with the latest happenings in the air conditioning and refrigeration field. See the listing of events for year 2017-2018.
Internet of Things have changed how HVAC controls work in ways not imagine before possible. See the impact of this technology today.
Direct Expansion System uses components such as the compressor, evaporator coil, metering device and condenser coil to expand the refrigerant and cool the room.
Here are the air conditioners frequently asked questions and answers.