A comprehensive HERS home energy rating, conducted by a certified RESNET Home Energy Rater, is the most in-depth energy performance assessment of a home that you’ll find. It consists of diagnostic testing using specialized equipment, such as a blower door test, duct leakage tester, combustion analyzer and infrared cameras to determine:
- The amount and location of air leaks in the building envelope
- The amount of leakage from HVAC distribution ducts
- The effectiveness of insulation inside walls and ceilings
- Any existing or potential combustion safety issues
Other variables that are taken into account include:
- Floors over unconditioned spaces (like garages or cellars)
- Attics, foundations and crawlspaces
- Windows and doors, vents and ductwork
- Water heating system and thermostats
The comprehensive HERS rating provides a computerized simulation analysis utilizing RESNET Accredited Rating Software to calculate a rating score on the HERS Index. The report will also contain a cost/benefit analysis for the recommended improvements and expected return on investment.