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Using warm air heating systems

Warm air heating is radically different to traditional central heating used in most British homes. Instead of a boiler, you have a much bigger furnace piping heat throughout the house. There are many similarities between using warm air heating and central heating, but there are also crucial differences. This article will help you understand the basic functions of warm air heating.

The thermostat

The entire process of a warm air heating system starts with the thermostat. The thermostat senses the temperature and then compares it to the user-desired temperature inputted on the control panel. If the temperature inside a house goes below the specified number, then the thermostat turns the furnace on. This is all done through electric circuitry. Most modern warm air heating units have very sophisticated computer technology to control the thermostat, including units manufactured by Johnson and Starley. You can buy units by Johnson and Starley from a number of reputable suppliers in the area of Bedfordshire

The burner

The first thing the thermostat does is turn on the burner. The burner is usually fuelled by gas or oil and will convert this fuel to heat energy in the furnace. The burner will continue to run until it is switched off by the thermostat or if it reaches the “fan limit”. At that point, the burner is turned off, even though other parts of the warm air heating system, such as the blower, will continue to run.

The burner feeds the heat into the heat exchanger which circulates hot combustion gas. That heats the furnaces metal plates causing it to get hot. The gases from the heat exchanger are safely vented outside the building using a flue vent, but, importantly, the heat captured by the furnace stays there.

The blower

The blower takes the cool air from the building, supplied by a cool air plenum, and “blows” it across the surface of the furnace. The furnace heats the cool air which is now considerably warmer. There it is sent though a warm air plenum for delivery into the ducts. The ducts then deliver the warm air around the house or building.

Dual warm air heating and radiant heating

Some buildings, particularly large spacious buildings, use a combination heating system featuring both a warm air heating element and a radiant heating element. These have a boiler that circulates heat through pipes. These radiate heat through vents in various areas of a room or building. However the pipes are also passed through a heat exchanger which heats the cool air returning from the cool air plenum. The warm air is then blown by fans via ducts, just like with a typical furnace, and sent through various parts of a building. This can increase efficiency by providing more heat with little extra cost.

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