VAC HERSHOME ENERGY RATING SYSTEM☰
THE VAC HERS PROCESS
Next phase in 5s
01

Initial HERS Report

We review the plans, building specifications and energy features to establish the initial HERS model and identify the requirements for the project.

Start with the model Early review helps the project team understand what will be needed before construction is complete.
02

Mass Save Submission

When applicable, we prepare and submit the project information needed to begin the Mass Save process.

Get the process moving Project documentation is organized early so required steps are easier to track.
03

Insulation Assessment & Cost

Know what your project needs before you spend more than necessary. VAC reviews the HERS model, energy code and insulation design—and can also help with the insulation trade.

HERS + Insulation We can help from the requirement through the insulation work.
  • What R-value is required
  • Where insulation is needed
  • How the insulation affects the HERS model
  • What installation needs to be verified
  • How to coordinate the insulation work
04

Blower Door & Duct Testing

We test the building envelope and duct system to measure actual air leakage and verify field performance against the project requirements.

Measure the real house Field testing confirms whether the finished work performs as expected.
05

Final HERS Report & Code Compliance

We incorporate the verified field results and prepare the final HERS documentation and energy-code compliance information for the project.

Document compliance The final report reflects the verified project conditions and test results.
06

Mass Save Final

When applicable, we complete the final testing and documentation required for the Mass Save process.

Complete the project Final documentation brings the HERS and applicable incentive process together.
Click phase to pause
A HERS rating is more than a final test. VAC follows the project from the initial model through insulation verification, field testing and final documentation.
HERS RATINGS & ENERGY TESTING

We measure how a house actually performs.

Certified HERS Rater providing blower door testing, duct testing, energy-code compliance, and Mass Save support for builders, contractors, and homeowners.

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⌖  Serving Massachusetts, Rhode Island & New Hampshire

TESTING YOU CAN TRUST

Certified & ExperiencedRESNET Certified HERS Rater with building science expertise.
Accurate TestingProfessional equipment and proven testing procedures.
Code & Rebate KnowledgeEnergy-code compliance and Mass Save incentive support.
Clear ReportsDetailed, easy-to-understand reports for your project.
OUR SERVICES

HERS Ratings

HERS ratings for new construction, renovations, and existing homes.

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Blower Door & Duct Testing

Air leakage and duct leakage testing for code compliance and performance.

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Energy Code Compliance

REScheck & COMcheck plus energy-code compliance documentation.

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Mass Save Support

Testing, inspections, and documentation support for eligible incentives.

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WHAT ENERGY CODE APPLIES TO YOUR PROJECT?

Enter your Massachusetts town to see the applicable energy-code tier.

Not sure what this means? We can help. Contact VAC →

Based on MA DOER municipal code adoption records. Adoption can change by local vote — verify with your building department. Official source →

Local & ResponsiveBased in Massachusetts. We know New England.
Professional ServiceClear communication and dependable scheduling.
Builder & Owner FocusedClear communication from start to finish.
RESNET CertifiedCertified HERS Rater with code and testing expertise.
WHY VAC

Testing is only useful when you can trust the results.

VAC combines field testing, building-science knowledge, and energy-code experience to give builders and homeowners clear answers — not just numbers.

✓Accurate field testing with professional testing equipment and documented measurements.
✓Code knowledge for HERS, residential and commercial energy-code compliance.
✓Clear reporting your builder, architect, or project team can use.

Mass Save Support

Building or renovating in Massachusetts? VAC can help with the HERS testing, inspections, and documentation needed for eligible Mass Save incentives.

HERSTestingInspectionsDocumentation
Talk to VAC →
OUR WORK

Real projects. Real testing.

Discuss your project →
HERS Rating & VerificationNew construction
Blower Door TestingEnvelope performance
Duct Leakage TestingCode & performance
GET STARTED

Request a Quote

Tell us about your project and we'll help you identify exactly what testing or compliance services you need.

Your information will be sent directly to VAC. We'll contact you using the information you provide.