![]() ![]() Special Furnace Venting and DrainageĪs explained above, a high-efficiency condensing furnace has special venting and condensate drainage requirements. ![]() It also provides energy savings due to its superior operating efficiency. It provides better performance and higher safety than a pilot light. The hot surface of the heating element ignites the gas burner. It is a hot surface ignition system that uses an electronically controlled resistance heating element, similar to a light bulb filament. Most specifically: Electronic IgnitionĪ high efficiency condensing furnace has an electronic ignition mechanism. There are several other important aspects of high efficiency furnace venting. Other Aspects of High Efficiency Furnace Venting The PVC pipes are used for air intake, exhaust gas, and to remove the corrosive condensation resulting from the combustion process. This high efficiency venting system must be installed when you install the new furnace. These PVC pipes are connected to the furnace and expelled outside. To avoid this problem, high efficiency furnace venting requires the use of PVC pipes instead of metal pipes to remove the acidic condensate from your home. It will ruin the standard venting equipment that is used in conventional gas furnace ventilation systems. What is vented is a residual corrosive condensate of water and carbon dioxide. It uses a venting system to extract that heat before venting. You can capture that heat with a high efficiency condensing furnace.Ī high efficiency condensing furnace can achieve efficiency ratings of 90 or above. However, these combustion gases contain residual heat that is lost through the ventilation. The exhaust system typically uses metal venting, often routed into a chimney stack, to exhaust the combustion gases created in the furnace fire chamber. For health and safety reasons, these combustion gases must be expelled through the furnace ventilation system out of your home.Ī conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. The process of burning natural gas creates combustion gases as byproducts. If you are thinking of installing a natural gas furnace in your new home or replacing an existing system with natural gas heat, be aware of the importance of high efficiency furnace venting. ![]()
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