Common Residential Hvac Duct Sizes

Round ducting comes in standard sizes ranging from 4 9 inches in diameter to just over 41.

Common residential hvac duct sizes.

Furnace filters come in a range of sizes and different brands and types of furnaces use different filters. Common circular ductwork sizes used in air handling ventilation systems. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. Mm height mm 100.

Duct system sizes and airflow quick chart created date. You can obtain a copy. Acca manual d is the industry standard containing procedures used for designing residential duct systems. Air volume equivalent round air volume cfm 4 6 8 10 12 duct inches cfm 50 6 x 4 550 75 6 x 4 675 100 8 x 4 6 x 6 6 100 125 10 x 4 6 x 6 7 125.

Standard hvac duct sizes. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. Failure to do so will result in high velocity and very likely loss of airflow. Increased by 1 round size for up to 800 cfm and 2 round sizes above 800 cfm to insure proper airflow.

The following duct sizes are based on a fraction drop of 10 inches per 100 feet of lineal duct. Larger volumes or higher static pressures should be dealt with on an individual job basis. The most common furnace filter sizes are 10 x 20 14 x 20 16 x 24 18 x 30 12 x 12 14 x 24 16 x 25 20 x 20 12 x 20 14 x 25 18 x 18 20 x 24 12 x 24 14 x 30 18 x 20 20 x 25 12 x 30 15 x 20 18 x 24 20 x 30 12 x 36 16 x 20 18 x 25 4 x 24 and 25 x 25 and these sizes. Larger volumes or higher static pressures should be dealt with on an individual job basis.

Ducting is the component of an hvac system that carries the flow of air through a residence or building. Round duct and rectangular duct comparison a round duct with a cross sectional area of 0 6m2 has a perimeter of 2 75m a rectangular duct with an equal cross sectional area has a perimeter of 3 87m the rectangular duct therefore requires more metal for its construction this adds more weight and costs to the design.