Energy testing for Dunnellon custom builds.
Blower door testing, duct leakage testing, and Manual J/D/S energy calculations for new residential construction across Dunnellon, Rainbow Springs, and southwest Marion County. Code-compliant reports for Marion County permits.
Dunnellon's new construction market skews more custom and lower-volume than the production builder activity dominant elsewhere in Marion County. The character of the building stock — riverfront homes along the Withlacoochee and Rainbow Rivers, larger acreage lots, and the Rainbow Springs and Rainbow Lakes Estates communities — means most projects benefit from individually-engineered Manual J calculations rather than master sets.
Permit submittals still flow through the Marion County Building Department in Ocala, with the same Florida 2023 Energy Code review standards applying across the county. The roughly 25-minute drive from B&I Testing's home base lets us schedule most Dunnellon blower door tests and duct leakage tests within two to three business days of the request.
Custom homes built for retirees and second-home buyers in the Dunnellon area frequently include design choices that affect energy calculations — larger window areas oriented to river or pond views, vaulted ceilings, mixed wall assemblies, and detached or partially-attached garage configurations. Each of these inputs feeds the Manual J load calculation, and inaccurate envelope assumptions are one of the most common reasons HVAC systems get oversized.
For homes on lots with significant elevation change or unusual orientation, the design conditions matter. Dunnellon sits at the western edge of Florida Climate Zone 2 with the same 93°F cooling design temperature that applies in Ocala — but solar exposure on a river-facing west-oriented great room with floor-to-ceiling glazing produces meaningfully different loads than the same square footage in a north-facing tract home. Both deserve the same engineering rigor.
The blower door test target for Dunnellon new construction is the same Florida Climate Zone 2 limit that applies countywide: a 5.0 ACH50 ceiling under any compliance path. Custom builds with careful air sealing detail at the framing stage routinely test below 4.0 ACH50, which keeps the project well clear of code and reduces the operating cost the homeowner inherits.
Per ANSI/RESNET/ICC 380. Signed certified report for certificate of occupancy.
Florida 2023 code limit ≤4 CFM25 per 100 sq ft. Rough-in or final.
Individually-engineered for custom builds. Vaulted ceilings, mixed walls, complex glazing handled.
Comfort and humidity diagnostics for existing Dunnellon homes with persistent issues.
Envelope Leakage Testing in Florida
How the blower door test works and what affects results in Florida construction.
Why Marion County Homes Fail Blower Door
Seven common air leakage patterns in Florida new construction.
Test Day: What to Expect
How a blower door test day actually runs from arrival to signed report.
Testing in Dunnellon?
Call directly for fastest scheduling, or send a message and Brandon will follow up the same day.