Energy testing on the US-301 corridor.

Blower door testing, duct leakage testing, and Manual J/D/S calculations for new residential construction throughout Belleview and the southern Marion County corridor. Marion County permit-ready, fast turnaround.

A blower door test for a 1,500 sq ft Belleview home is engineered to the same Florida Building Code, Energy Conservation standards as a 4,000 sq ft custom build in Heath Brook. Same 5.0 ACH50 ceiling under any compliance path. Same ANSI/RESNET/ICC 380 procedure. Same signed report required for certificate of occupancy.

What changes is the engineering approach behind the scenes. Smaller homes with simpler envelopes and standardized HVAC equipment selections move through Manual J / Manual S faster, and most builders working in this market benefit from a master set when running three or more similar plans — locking in calculations once and reusing them across the pipeline rather than ordering each lot individually.

Builder pricing reflects that efficiency. We don't charge custom-home rates for production-volume work, but we do apply the same code knowledge and the same Florida Climate Zone 2 design conditions to every project.

East of US-301, the housing stock shifts toward the Lake Weir community — older homes mixed with newer infill construction, plus a handful of waterfront builds where Manual J inputs need more care because of unusual orientations and larger window areas facing the lake.

Existing-home Performance & Comfort Assessments are common in this part of the service area too — homeowners with 1990s or 2000s construction calling about humidity that won't drop below 60%, AC systems that short-cycle, or rooms that just won't stay comfortable. Diagnostic blower door, duct leakage, and Manual J / Manual S analysis usually identifies the source — and most of the time it's fixable without a full HVAC replacement.