AFUE

AcronymDefinition
AFUEAnnual Fuel Utilization Efficiency
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The authors and their partners have shown through prior efforts that this GAHP operates with a projected 140% AFUE, with operating efficiency at or better than existing GAHPs and cold climate electric heat pumps [Garrabrant, 2016].
Location Oak Ridge, Tennessee, USA Building size Two-story, 12.2 m x 12.2 m, 4.3 m floor-to-floor height Exterior walls Concrete masonry units with face brick, RUS-11 (RSI-1.9) fiberglass insulation Floor Slab-on-grade Roof Metal deck with RUS-18 (RSI-3.17) polyisocyanurate insulation Windows Double-pane clear glazing, 28% window-to-wall ratio Baseloads 9.18 W/[m.sup.2] lighting power density, 14.04 W/[m.sup.2] equipment power density Baseline HVAC 44 kW, 9.7 EER rooftop unit; 81% AFUE natural system gas furnace; VAV terminal units and electric reheat VRF system 42 kW VRF system with a DOAS Table 2: Regression models for RTU power consumption for heating season.
Included in the database (for both pre-retrofit and post-retrofit) are the furnace type and model number, fuel type, rated furnace efficiency, annual fuel utilization efficiency (AFUE), a flag indicating the presence of a DC fan motor, and estimated annual fuel consumption.
Since Heather is allergic to wood smoke, there are four propane fireplaces throughout the house, all with an AFUE (Annual Fuel Utilization Efficiency) rating.
Upgrade your furnace or boiler to a 95 percent AFUE unit for a credit of $150.
It has a 93 percent Department of Energy AFUE efficiency rating on the 80 to 285s model and a 91 percent DOE thermal efficiency rating on the 399 and 500 models.
* Look for high Annual Fuel Utilization Efficiency (AFUE) ratings and the Seasonal Energy Efficiency Ratio (SEER) on products.
The AFUE rating averages the amount of gas used to keep a pilot light running with the steady-state efficiency of the stove.
The basis for comparison among units is a laboratory-tested seasonal efficiency known as the Annualized Fuel Use Efficiency (AFUE) rating, and is provided on the required Energy guide fact sheet for each unit.