### ACRONYMS AND ABBREVIATIONS

AC: alternating current 

### ACCA: Air Conditioning Contractors of America ACEEE: American Council for an Energy Efficient Economy AEC: annual energy consumption 

### AEO: Annual Energy Outlook AFUE: Annual Fuel Utilization Efficiency AGA: America Gas Association AHP: air power ANOPR: Advanced Notice of Proposed Rulemaking ANSI: American National Standards Institute ARI: Air-Conditioning and Refrigeration Institute ASHRAE: American Society of Heating, Refrigerating and Air-Conditioning Engineers ASTM: American Society for Testing and Materials BOH: burner operating hours BOM: bill of materials 

### cfm: cubic feet per minute CFR: Code ofFederal Regulations CO: carbon monoxide 

### C02: carbon dioxide CPI: Consumer Price Index DF: draft factor DHR: design heating requirement DOE: U.S. Department of Energy (also "the Department") DOJ: U.S. Department of Justice EAE: average annual auxiliary electricity consumption ECM: electronically commutated motor EIA: DOE's Energy Information Administration EPACT: Energy Policy Act EPCA: Energy Policy and Conservation Act FEMP: Federal Energy Management Program GAMA: Gas Appliance Manufacturers Association GDP: Gross Domestic Product 

### GRI: Gas Research Institute GRIM: Government Regulatory Impact Model GTI: Gas Technology Institute HCL: house cooling load HDD: heating degree-days HHL: house heating load HSI: hot surface ignitor 

### HTPV: high temperature plastic vents HVAC: heating, ventilation

, and air conditioning

AA-1 AC: ACCA: ACEEE: AEC: AEO: AFUE: AGA: AHP: ANOPR: ANSI: ARI: ASHRAE: ASTM: BOH: BOM: cfm: CFR: CO: CO2: CPI: DF: DHR: DOE: DOJ: EAE : ECM: EIA: EPACT: EPCA: FEMP: GAMA: GDP: GRI: GRIM: GTI: HCL: HDD: HHL: HSI: HTPV: HVAC: ACRONYMS AND ABBREVIATIONS

alternating current Air Conditioning Contractors ofAmerica American Council for an Energy Efficient Economy annual energy consumption Annual Energy Outlook Annual Fuel Utilization Efficiency America Gas Association air power Advanced Notice ofProposed Rulemaking American National Standards Institute Air-Conditioning and Refrigeration Institute American Society ofHeating, Refrigerating and Air-Conditioning Engineers American Society for Testing and Materials burner operating hours bill ofmaterials cubic feet perminute Code ofFederal Regulations carbon monoxide carbon dioxide Consumer Price Index draft factor design heating requirement U.S. Department ofEnergy (also "the Department") U.S. Department ofJustice average annual auxiliary electricity consumption electronically commutated motor DOE's Energy Information Administration Energy Policy Act Energy Policy and Conservation Act Federal Energy Management Program Gas Appliance Manufacturers Association Gross Domestic Product Gas Research Institute Government Regulatory Impact Model Gas Technology Institute house cooling load heating degree-days house heating load hot surface ignitor high temperature plastic vents heating, ventilation, and air conditioning

AA-l

### HX: heat exchanger

ICS: isolated combustion system IM: installation model in.w.g.: inches water gauge 

### kWh: kilowatt hours (10' watt-hours) LCC: life-cycle cost LPG: liquid petroleum gas MHF: mobile home furnace MHI: Manufactured Housing Institute MIA: manufacturer impact analysis MMBtu: million Btu NAECA: National Appliance Energy Conservation Act NECPA: National Energy Conservation Policy Act NEMS: National Energy Modeling System NES: national energy savings NFGC: National Fuel Gas Code NFPA: National Fire Protection Association NOPR: Notice of Proposed Rulemaking NON: oxides of nitrogen NPGA: National Propane Gas Association NPV: net present value 

### NRCan: Natural Resources Canada OIRA: Office of Information and Regulatory Affairs OMB: Office of Management and Budget 

### PBP: payback period PSC: permanent split capacitor psig: pounds per square inch gauge PVC: polyvinylchloride quads: quadrillion (10") Btu 

### R&D: research and development RECS: Residential Energy Consumption Survey rpm revolutions per minute S&P: Standard & Poor's SCF: standard cubic feet SEER: Seasonal Energy Efficiency Ratio SI: standard units SG&A: selling, general, and administration costs SNOPR: Supplemental Notice of Proposed Rulemaking SO2: sulfur dioxide SSE: steady state efficiency TPV: thermophotovoltaic TSD: Technical Support Document UEC: unit energy consumption UL: Underwriters Laboratories

AA-2 HX: ICS: 1M: in.w.g.: kWh: LCC: LPG: MHF: MHI: MIA: MMBtu: NAECA: NECPA: NEMS: NES: NFGC: NFPA: NOPR: NOx: NPGA: NPV: NRCan: OIRA: OMB: PBP: PSC: 

### pSlg: PVC: quads: R&D: RECS: rpm S&P: SCF: SEER: SI: SG&A: SNOPR: 

### S02: SSE: TPV: TSD: UEC: UL: heat exchanger isolated combustion system installation model inches water gauge kilowatt hours 

### (103 watt-hours) life-cycle cost liquid petroleum gas mobile home furnace Manufactured Housing Institute manufacturer impact analysis million Btu National Appliance Energy Conservation Act National Energy Conservation Policy Act National Energy Modeling System national energy savings National Fuel Gas Code National Fire Protection Association Notice ofProposed Rulemaking oxides ofnitrogen National Propane Gas Association

net present value Natural Resources Canada Office ofInformation and Regulatory Affairs Office ofManagement and Budget paybackperiod permanent split capacitor pounds per square inch gauge polyvinylchloride quadrillion 

### (1015) Btu research and development Residential Energy Consumption Survey revolutions per minute Standard & Poor's standard cubic feet Seasonal Energy Efficiency Ratio standard units selling, general, and administration costs Supplemental Notice ofProposed Rulemaking sulfur dioxide steady state efficiency thermophotovoltaic Technical Support Document unit energy consumption Underwriters Laboratories

AA-2