Furnace Makeup Air Intake

Your home furnace air intake location depends on where the furnace is.

Furnace makeup air intake.

Begin your home improvement project with confidence. Answer a few questions about your upcoming project and we will find contractors who can help. Need fresh or makeup air. The makeup air system consists of a make up air damper mounted on the return air duct of an hvac system and an intake air hood installed through an exterior wall to allow outdoor air into the home with the two being typically connected by installer supplied standard 6 galvanized sheet metal pipe.

Wall intakes must also be 10 feet from any exhaust fan discharge outlet unless that outlet is 3 feet or more above the intake location. Intakes should not be located directly above any wall exhaust or vent. Modernize will quickly match you with contractors. Intakes must be protected against rain and pest entry with durable rust and rodent proof materials.

Fresh air intakes can be in multiple locations throughout your home especially in newer homes built to modern building codes requiring homes to be much tighter than older homes. Watch my video below. Keep the intake hood away from exhaust vents dryer vents and furnace vents. Irc 2006 section m1602 2.

It is easy to install a fresh air intake for a furnace. There are two types of airflow furnaces a downdraft or downflow furnace and an updraft or upflow furnace. Click here to get tim s free funny newsletter. With a make up air unit that same 10 f air can be tempered to 50 f.

Likewise if the outside air temperature is 10 f then the ventilation fan is bringing in 10 f air. In many homes the fresh air intake is simply an open duct ran from an outside vent into a basement or any room housing the home s furnace. Department of energy a defining feature of high efficiency furnaces is sealed combustion a process by which outdoor makeup air is piped directly into the burner. According to the u s.

If the outside temperature is 100 f with 85 relative humidity then a standard ventilation fan is bringing in 100 f with 85 relative humidity air. Fans furnaces water heaters etc. Diy friendly cut a 4 25 inch hole in side of house. Step 1 locate a spot for the fresh air intake hood on the outside of the home.