Our Services

A clear path from design to final certification

Modeling, field verification, testing and documentation — handled by one rater, in the order the build actually needs them.

HERS Ratings

The certified HERS Index score your building department needs, backed by energy modeling and field verification at every required stage of the build.

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New Construction Rating

Full rating from projected score at permit through final certified report and RESNET registration.

ADU Ratings

Accessory dwelling units carry their own thresholds. We model them to the correct target.

Additions & Renovations

Rating and testing scoped to the work being permitted, not the whole house.

Multifamily

Per unit ratings and sampling for low rise residential buildings.

Performance Testing

Blower door and duct leakage testing to RESNET standards, scheduled around your trades and documented the same week.

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Blower Door Test

Air leakage measured and reported in ACH50, with results explained rather than just emailed.

Duct Leakage Test

Total leakage and leakage to outside, run in the same visit as the blower door.

Pre-Drywall Inspection

Insulation and air barrier reviewed before the walls close, while fixes are still cheap.

Final Verification

The closing test and certified report that clear your Certificate of Occupancy.

Code Compliance

Massachusetts runs three energy codes at once. We tell you which one your town adopted and what it will take to pass it.

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REScheck Reports

Compliance documentation prepared for your permit set.

Stretch Code Compliance

HERS pathway targets of 45 for all electric and 42 for mixed fuel on permits after July 1, 2024.

Pathway Selection

HERS pathway or Passive House, all electric or mixed fuel, decided before the permit goes in.

Plan Review

Assemblies, windows and mechanicals reviewed against the target before anything is ordered.

Mass Save Rebates

The Residential New Construction program pays builders for going past code and helps offset the rater cost. We prepare the documentation and keep the deadline in view.

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Program Enrollment

The program requires registration before the midpoint inspection — the deadline most builders miss. We prepare and submit what it asks for.

Incentive Documentation

Inspections and filings the program requires to release the incentive.

ENERGY STAR Certification

Verification for projects going after the enhanced incentive tier.

Electrification Requirements

Guidance on the requirements that apply to projects registered after July 1, 2024.

What each test actually measures

Four of these come up on nearly every project. Here is what they are, in plain terms, and when in the build they need to happen.

Measure air leakage. Improve performance.

A blower door test measures how airtight a building is. A calibrated fan sits temporarily in an exterior doorway and creates a standard pressure difference, and the equipment measures how much air moves through leaks in the envelope. The result confirms code compliance, sizes the ventilation the home needs, and locates drafts around penetrations, windows, attic hatches and assembly joints.

When: required for most residential projects and every final HERS rating. A pre-drywall check first is what keeps the final from failing.

Verify conditioned air reaches the living space.

Duct leakage testing measures how much air escapes the duct system. Registers are sealed, a calibrated fan pressurises the ductwork to a standard test pressure, and the measured leakage is compared against the applicable code limit. Leaky ducts waste energy, cost comfort, and make the HVAC system work harder for the same result.

When: at rough-in, above all. That is while the installer can still reach the problem — after finishes, the same repair means opening ceilings.

A tight home needs planned fresh air.

Modern energy codes generally require whole-house mechanical ventilation, and the tighter the envelope the less optional it becomes. We review the proposed strategy and verify installed airflow where the code requires it. Depending on the project that may be an ERV, an HRV, or another approved approach.

Why it matters: ventilation carries indoor air quality, moisture control and occupant comfort — not just the compliance box.

Residential prescriptive energy-code documentation.

REScheck is a US Department of Energy tool for showing that a project meets a prescriptive energy-code path. The report evaluates the thermal envelope: insulation levels, windows, doors and assemblies. It is not the right path for every project or every municipality.

First step: we confirm REScheck is accepted for your project before preparing it, then build the report from your plans and product specifications.

Not sure which code your town is on?

Send us the address. We will tell you whether it falls under base code, Stretch Code or the Specialized Code, and what that means for your project.

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