pass the air one place to another place ,hot year or coll air
the arrow points in the direction of air flow.
no heat would flow
no heat would flow
A furnace regulator helps to deliver a set pressure and flow rate of gas to the furnace so it burns in a stable condition.
The four types of air flow patterns are up flow, down flow, low boy, and horizontal
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Toward the direction of the air flow. In other words the air is being drawn into the furnace so the arrow should point at the furnace.
The FRI, or Flow Rate Index is a rating system for the flow rate of solids. Air and air pressure measurement connections are part of the testing apparatus.
An up-flow furnace is a heating device that draws in air from near floor level in a building, heats it and then discharges the warmed air through a vent or plenum at the top of the machine. The warmed air is then fed into ductwork that distributes it throughout the building. This type of furnace is useful for installation below the area to be heated.
Actually combustion reactions takes place in Furnaces. So when we keep high flow rate then the air to fuel ratio increases which means excess air will be wasted. The compressing of air also takes more energy which will be wasted. If we give excess air flow then we are simply taking away the heat produced to outside the furnace.
downflow
Furnace Purge would involve allowing some minimum quantity of air to flow through the furnace (without fuel) for a specified period of time to remove any unburnt fuel.