What’s the difference between Manual J, D, and S?
Manual J = Load calculation Manual D = Duct design [...]
Are Manual JDS calculations required for code compliance?
Yes. Most states, including MA and MI, require Manual J, [...]
How fast can I get my energy calculation/modeling report?
We typically provide energy modeling reports in 2–3 business days.
Will energy calculations/modeling help me get rebates?
Yes—many rebate programs require a modeled energy baseline and post-improvement [...]
Do I need energy calculations for a remodel?
If you’re doing major changes (HVAC, insulation, windows), modeling is [...]
What’s the difference between an energy audit and modeling?
An audit is done on an existing structure. Energy modeling [...]
Is energy modeling required for permits?
Yes—especially where energy code and performance standards apply (like IECC [...]
How long does air infiltration sealing take?
Most projects take a few hours to a day depending [...]
Is air sealing included in Mass Save® rebates?
Yes, especially when paired with insulation upgrades and verified through [...]
What areas do you typically seal for air infiltration?
Common areas include attic accesses, rim joists, wall penetrations, top [...]
