| Fuel Gas and Heating Values |
| Natural gas, LPG, and propane are commonly used fuel gases. LPG is a mixture of propane and butane. It is generally transported and stored in liquid form. |
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| Minimum Duct Insulation R-Value |
| Thermal insulation is commonly used to reduce energy consumption of HVAC systems and equipment. Minimum insulation levels for ductwork and piping are often dictated by energy codes, many of which are based on ASHRAE Standards |
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| Grashof Number (GR) |
| The Grashof number is used to determine the heat transfer coefficient under free convection conditions. It is basically a ratio between the buoyancy forces and viscous forces. |
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| Water Vapor Released by Humans |
| Water Vapor Released by Human Activity and Plants Estimating moisture loads requires knowledge of occupancy patterns and releases per individual, activity, plant, and water surface present |
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