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Reference Sheets and Technical Documents

Quick Reference Standards

Combustion Appliance Safety Inspection for Vented Appliances

CST Procedure for Gas Ovens, Direct, Power-Vented, or Vent-Free Appliances

Quick Reference Testing In/Testing Out Requirements for Certified Professionals

A/C Heat Pump Standards

Heating Standards

Envelope Standards

Technical Documents

Guidance on Estimating Distribution Efficiency

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Learn about HPXML

The Home Performance Extensible Markup Language (HPXML) is an open data standard created to support a growing industry by streamlining the exchange of data on residential building and energy performance.

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