Glossary

Terms for Architecture, Green Building & Energy

This glossary includes more than 300 solar terms, as well as hundreds of additional sustainable design and construction terms.

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Annual Fuel Utilization Efficiency

Definition: a measurement of the seasonal energy efficiency of gas heating equipment, whose value is equal to the annual output energy of the equipment divided by its annual input energy, expressed in consistent units (i.e. Btu-out per Btu-in)