2014年3月11日 · Below is my furnace and I need to change the filter however I am unsure which way is the airflow direction. Red or B

2013年1月3日 · The filter sits between the air return duct and the heat chamber, BEFORE the cool air enters the furnace. The air flow arrow almost certainly will point at the furnace, not away from it. If the filter sat after the furnace, there would be potential hazards associated with it, like possibility of fire (hot air hitting a cardboard frame) and ...

2023年8月7日 · Since hot air prefers to rise, the cold return air is often, but not always, supplied at the bottom of the furnace, so a duct connection at the bottom will be an opening where air flows into the furnace, which is rightward in this picture. (But some furnaces don't follow this principle — the blower is much more powerful convection — so this ...

2015年10月1日 · That's an upflow unit, so the air flow would be in the direction of the red arrow. The air flows in through the lower side, up through the heat exchanger/evaporator coil, and out the top of the unit. The first clue, is that the filter will always be where the air enters the unit. Secondly, the blower is typically on the inlet side of the ...

2016年2月24日 · Here is the cold air return intake (A in diagram - 12"x30"=360sq.in) The intake runs between two pairs of floor joists, and the gap closest to the furnace, left side in photo, is noticeably louder than the other side. Here are the suspended trunks - return is on right, about 16' long (B in diagram - 24"x6"=144sq.in)

2010年12月12日 · They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. Unlike a conventional system—where the furnace goes on, blows hot air into the house at full force for a few minutes, and then shuts off—a variable-speed or “variable-capacity” system runs the blower for longer periods at lower speeds.

For the ducts, the setting indicates where you should set the switch based on the season. If your house has separate air return ducts on different floors or even multiple ducts on the same floor, changing the setting changes which ducts pull air from the house, allowing lower ducts to suck cold air out in the winter and higher ducts to suck hot air out in the summer.

The filter should have some markings on it, to indicate which way the air should flow through it. Make sure when you install it, you install it in the proper direction. Supporting Documentation. The installation instructions shows the location of an optional external side air filter kit, which is the slot in the photos you've provided. It also ...

2018年2月4日 · The furnace installation directions specifies a shutoff valve with a 1/8" NTP plugged hole for test gauge. I bought this valve and am ready to assemble the pipes but I am uncertain about which side of the valve the plugged hole goes on.

2018年3月28日 · I have to warn you however that low air flow can damage the furnace and actually be less efficient. You should take the temperature at the outlet of the furnace and at the inlet of the furnace. Subtract the two, this will give you your split. Compare that to the required split on the nameplate of the furnace. If it is too high you need more air.