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What removes the combustion gases from a balanced draft furnace?
Wiki User
∙ 13y ago
A balanced draft has both ID and FD fans.
ID Fan works by pulling the gases through the furnace hence creating the required draft. Where as FD fan pushes the gases into the furnace.
Hence in a balanced draft frunace, the ID fan can said to be removing the combustion gases.
Wiki User
∙ 13y ago
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Does an electric furnace need an outside air intake?
No, an electric furnace does not need an outside air intake. For oil and gas furnaces an air supply is needed. It is called combustion air. It is needed for complete combustion of the fuel and not use the heated air that is in the house. Today's homes are built as a sealed unit to stop infiltration air from leaking in and costing the home owner more money to heat the home. Many installations use a motorized damper that cuts off the air supply when the furnace is not operating. This prevents a draft through the vent from the outside of the house when other extracting devices are operating.
What is natural draft in a boiler?
when the weight of warm air in the stack is less than the cool air around the stack , it causes an upward flow pulling air thru the furnace
What is a discovery draft?
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How do you write a draft of a reseach paper?
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How many days did it take to draft the constitution?
how many days to draft the us constituition?
What is a balanced draft and how is it controlled?
furnace equipped with FD(force draft) and ID(induced draft) fan /blower are called balanced draft system.Fd used to regulate combustion airflow while ID used to regulate furnace pressures type of furnace operate slightly below ATM pressure .
What is a furnace draft?
The air flow up your chimney that carries the products of combustion (flue gases) out of your house.
How FD and ID fan control the air flow?
FD or Forced Draft Fans supply combustion air to the boiler. Different combustion controls demand a supply of combustion air in different ways but what they have in common they control the FD fan to provide enough air for complete combustion in the boiler furnace. In most systems in use today the ID or Induced Draft fan sucks the products of combustion from the boiler furnace, through the various passes of the boiler and pushes it out the chimney. How much or how fast this fan works is based on furnace pressure. The ID fan control set point is based on combustion side furnace pressure. If the furnace pressure goes up the ID fan removes more air to lower the pressure. As the furnace pressure goes down the ID fan removes less air. This air flow out of the boiler is referred to as draft. Both the FD and ID can be controlled by various means. The air flow can be restricted in the plenum or ducts by dampers or louvers or the speed of the fan can be changed by mechanical means from a fixed speed driver. Also the speed of the fan can be changed by the use of a variable steam turbine or an electric motor with VFD (Variable Frequency Drive)
Is forced draft has negative pressure drop?
No, the forced draft fan has positive pressure as it just forces yhe air into the combustion chamber.only the induced draft fan has negative pressureas it removes the flue gases & exhaust gases is stacked up
Forced draft fan vs induced draft fan?
In a balanced draft boiler, you actually have both: forced draft (FD) fans supplying air to the furnace, and induced draft (ID) fans removing flue gas. Typically, the FD fans control airflow, while ID Fans control furnace pressure to slightly below atmospheric pressure. In general though, the choice between forced draft and induced draft is based on how "tight" the system is - if you have leaks, it is better to use ID, as FD will cause product loss.
Why induced draft fan operate first instead of a forced draft fan?
The procedure for starting draft plant (fans) in a boiler is to start the ID Fan first. Remember that the purpose of the ID Fan is so that the Furnace operates at a slight vacuum. (See Related Link: FD Fan vs ID Fan.) Any casing or furnace leaks then allow air to leak in, rather than allowing air with pulverised fuel and fly ask to leak out.
What is furnace draft control?
A valve that brings atmospheric air into the furnace exhaust to help expel the exhaust gases.
What is Difference between natural draft and forced draft in modern furnace technology?
natural draft depends on:ambient air conditionsconditions of the leaving gaschimney height
What is the purpose of the draft diverted on a gas furnace?
It protects the Pilot Light from being blown out
What is the purpose of a draft diverter on a gas furnace?
It protects the Pilot Light from being blown out
What is the purpose of the draft diverter on a gas furnace?
It protects the Pilot Light from being blown out
Down draft kiln?
A down draft kiln is a furnace where the flue (exit for burned gases) is the located near bottom of the fire box. This type of furnace requires a tall chimney to produce enough draft (or air flow) and typically produces even heat distribution through out the fire box.
