Which side of air filter is dirty?

In all cases, the furnace filter should be dirty on the side that the air comes into the furnace from. If your air filters are dirty in some other fashion, it is likely your furnace is not working properly, or the filter was installed incorrectly.

How do I know which way my air filter goes in?

To properly insert a new filter, look for the arrow! The arrow on your filter should always face the unit and away from the return air duct that carries the air that will be heated or cooled. HVAC systems push the cool or warm air out and pull spent air in, recirculating the air throughout your home.

What happens if you put home air filter in backwards?

If you set your filter up backwards, the normally collective end of the device will not face the air supply. In effect, your filter will help keep debris in the air. This results in a clogged filter and improperly cleaned air when it reaches your lungs.

What direction does air flow in a furnace?

If you are looking at a furnace filter, find the arrow that indicates the proper air flow direction. That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.

Which way does the arrow point on a furnace filter?

The arrow points in the direction of the airflow. The point should go toward the inside of the furnace compartment. If the filter goes inside the ductwork, it should point toward the air handler or the furnace.

Which side of air filter is dirty?

What does the arrow on an air filter mean?

Not every furnace filter has an arrow stamped on its side, but when you do see it, it indicates which direction the filter has to face. It always points to the direction of the furnace's air handler or blower compartment.

Why do air filters have a direction?

HVAC filter direction matters because air flows through it in one direction. While its two sides look the same, one is more porous to allow air to get inside. Otherwise, air can't pass, and the unit itself must work harder and longer, leading to higher energy consumption and efficiency loss.

Does the arrow point up or down on an air filter?

Position the airflow arrow so that it points in the direction the air is flowing. In addition to clean air, filters also protect your HVAC system from debris and dirt buildup. The airflow arrow should point towards the furnace/blower motor to collect harmful particles before it reaches the furnace's equipment.

Which side of air filter faces out blue or white?

The colored side should always face away towards the cleaned air.

How often should you change air filter in house?

Generally, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days, or 3 months. That can change based on where your home is located (ex. dusty, dry climates), if you have any pets, and the age of your system and equipment.

How often should you change your furnace filter in the winter?

Professionals, like our team at Airco Service, Inc. say that you should change your air filter at least every three months. During the winter, when you rely on your heating system more, you want to increase that frequency. During the winter, when the system is in constant use, change it out every month.

Does furnace pull air from outside?

Since high efficiency furnaces draw air directly from outside, the furnace itself does not require a fresh air intake in order to replace inside air that otherwise would have been drawn from the room the furnace is located in.

Why is my furnace blowing cold air?

If your furnace is blowing cold air in your home, this is a sign of an issue with the flame detector, gas supply, air filter, pilot light, or condensate lines. Many of these issues are able to be easily solved on your own by sanitizing or replacing components in the gas furnace.