Tuesday, August 10, 2010

Oil and Gas Furnaces


Gas furnaces burn fuel which can be hazardous just like any fossil fuel. Furnaces using gas or oil fuel need carbon monoxide detectors and failsafe shutoff valves to keep you safe from poisoning or fire. Modern furnaces are very well engineered and all professional HVAC technicians should install detectors as part of the heating installation.

The overall rate of failure for vents and flues is very low, but you still need to be cautious around any combustible equipment. Eventually a machine will fail, especially at the heat exchanger. Propane and natural gas are the two ways gas is used to heat your home. Some Denver heating experts prefer propane because it provides around 2.5 times as many BTUs of heating per cubic foot. Interestingly the two heating gases are delivered in different ways. Natural gas needs a pipeline to be delivered while propane is commonly bottled and trucked in. Naturally odorless and clear, they have a strong smell added to alert people of leaks.

Be careful of gas leaks as the gas will behave differently. Natural gas rises, while propane sinks and can collect on the ground. The air handler heater furnace contains a valve manifold and burners which heat up to thousands of degrees. A heat exchanger is a special device designed to withstand this heat and convert it into warm air to heat your home. The safety systems disengage the gas and keeps the fan on when the temperature has risen to a dangerous level.

Some high efficiency burners for commercial Denver HVAC have two stage furnaces which force air into the second stage like a supercharger. As the air is forced out the ventilation shaft, the fuel is burned at a very efficient rate. However two stage burners like these are only economical in large commercial applications.

Oil provides even more BTU's per volume, but as a liquid, it has a fixed volume that cannot be compressed like propane. Denver furnace repair techs like oil furnaces because they are simple and the technology has been around a while. The oil tank should be a considerable distance from the burners when doing HVAC design. The oil line and tank should be inspected for leaks, and oil furnaces need filter replacements as well. The operation of oil heaters is actually very similar to gas, except that the flue on an oil furnace needs a barometric damper to detect oil levels.

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