The HERS Index is the Home Energy Rating System created and administered by RESNET (the Residential Energy Services Network) — the national scoring standard used to describe how efficient a home is relative to a fixed reference point. A home built to the reference standard scores 100; a net-zero-energy home scores 0. Every point below 100 represents an incremental efficiency gain over that reference, which is why the HERS Index shows up on new-construction spec sheets, ENERGY STAR® certification paperwork, and some code-compliance and incentive-program documentation.
A HERS rating is performed by a RESNET Certified HERS Rater and is not a visual walkthrough — it combines on-site diagnostic testing (blower-door and duct-pressure testing among them) with a modeled energy analysis of the home's construction, systems and equipment to produce the score. The rating is registered with RESNET's national registry, which is what makes the number portable and verifiable rather than a private estimate.
Randolph Scott Bell holds RESNET certification as a HERS Rater, RTIN 4516301, and is also a LEED Accredited Professional. That credential stack was built during an energy-rating career working for a solar fund based in Fort Pierce, Florida, over the course of which he performed 350+ certified energy ratings in St. Lucie County — the volume that turned the HERS diagnostic process from a checklist into a habit.
He is also a Florida State-Certified General Contractor (CGC1528750), 17 years building in Palm Beach County. The combination is unusual: most HERS raters do not also hold a general contractor's license, and most general contractors have not spent a career reading a house's energy performance in numbers rather than opinions. Read the diagnostic process itself — a documented blower-door and infrared-thermography energy audit, with the photographs — on the consulting page.
This page is about the HERS rating and the credential behind it. If you're looking for the broader homeowner-facing energy audit process — what a whole-house energy audit finds and what gets fixed afterward — that is covered in the home energy audit guide and energy-efficient home improvement. Both sit on the construction side of the site; this page is the rating credential and the advisory engagement itself.
HERS rating and energy consulting is one of the advisory engagements on the consulting page — call to talk through what your project needs. This is advisory work, scoped per project; there's no fixed price list here.