What is the approximate density of water in pounds per gallon?

The approximate density of water is about 8.34 pounds per gallon. This value is commonly used in HVAC calculations when dealing with water systems, as it provides a reliable reference for converting between volume and mass.

Understanding this concept is crucial because water is often a primary fluid in heating and cooling systems. Knowing its density allows HVAC professionals to calculate the flow rates and pressure drops in piping systems accurately. It also assists in determining the thermal energy transfer when water is heated or cooled, which is key to designing efficient systems.

While the other values listed do not accurately represent the density of water at typical conditions, they can create confusion if mistakenly used in calculations. Therefore, relying on the correct value of 8.34 lbs/gallon is essential for precise HVAC engineering and design.