Energy Efficiency and Renewable Energy Glossary AFUE (Annual
Fuel Utilization Efficiency): a rating that denotes the
efficiency of gas heating equipment. It is the amount of heating
your equipment delivers for every dollar spent on fuel. A higher
rating indicates more efficient equipment. AHRI Certificate: The
Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is
the trade association representing more than 300 manufacturers
of air conditioning, heating and commercial refrigeration
equipment. Their certification programs demonstrate to
government, building owners and homeowners that HVAC equipment
performance claims have been independently measured and
verified, instilling consumer confidence and enabling fair
product comparisons. EER (Energy Efficiency Ratio): The higher
the EER rating, the more energy efficient the equipment is. This
can result in lower energy costs. This DOE site can show how to
calculate potential energy cost savings of a more efficient
unit. Energy Factor: the measure of overa