Return air - Low velocity – the velocity of air in these ducts is up to _______ for commercial and factory comfort, AC​1000 fpm2000 fpm1500 fpm2000 fpm

Breakdown the Problem

1. Identify the context of the question regarding return air and its velocity in ducts.
2. Analyze the options provided for typical velocity ranges in commercial and factory air conditioning systems.

Relevant Concepts

1. Comfort air conditioning systems typically have a range of air velocities depending on the application, generally around 600 to 1500 feet per minute (fpm) for comfort and up to 3000 fpm for industrial applications.

Analysis and Detail

1. In commercial settings, a typical return air velocity is often within the range of 1000 fpm to 1500 fpm.
2. Too high a velocity can lead to noise and discomfort, while too low can lead to inefficiency in the system.

Verify and Summarize

1. The options given are: 1000 fpm, 2000 fpm, 1500 fpm, and 2000 fpm.
2. Based on standard practices in HVAC system design, the safest choice for comfort and efficiency in return air would be 1000 fpm or 1500 fpm.

Final Answer

The velocity of air in these ducts is up to 1500 fpm for commercial and factory comfort air conditioning.