Common Residential Hvac Duct Sizes

Standard hvac duct sizes.

Common residential hvac duct sizes.

Duct system sizes and airflow quick chart created date. 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. Common circular ductwork sizes used in air handling ventilation systems. Commonly used rectangular duct sizes in air handling ventilation systems.

Larger volumes or higher static pressures should be dealt with on an individual job basis. Ductwork is composed of. Failure to do so will result in high velocity and very likely loss of airflow. You can obtain a copy.

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. This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. Mm height mm 100.

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. Round ducting comes in standard sizes ranging from 4 9 inches in diameter to just over 41. Increased by 1 round size for up to 800 cfm and 2 round sizes above 800 cfm to insure proper airflow. Acca manual d is the industry standard containing procedures used for designing residential duct systems.

This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. 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.