Delta T (ΔT) describes a difference in

Delta T (ΔT) describes a difference in

• A. Pressure
• B. Humidity
• C. Volume
• D. Temperature

Answer: (D)

Delta T describes how much temperature has changed between two points. It’s the difference in temperature, found by subtracting the initial temperature from the final temperature. The sign tells you the direction of change—positive means warming, negative means cooling. This concept is handy in building operations for judging heating and cooling loads and how well equipment is performing. It’s not a measure of pressure, humidity, or volume, which would involve different deltas (like ΔP, ΔRH, or ΔV). For example, if air goes from 60°F to 80°F, ΔT is 20°F, showing a 20-degree temperature increase.

Delta T describes how much temperature has changed between two points. It’s the difference in temperature, found by subtracting the initial temperature from the final temperature. The sign tells you the direction of change—positive means warming, negative means cooling. This concept is handy in building operations for judging heating and cooling loads and how well equipment is performing. It’s not a measure of pressure, humidity, or volume, which would involve different deltas (like ΔP, ΔRH, or ΔV). For example, if air goes from 60°F to 80°F, ΔT is 20°F, showing a 20-degree temperature increase.