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What is the difference between a blower door test and a duct tightness test?

A blower door test measures air leakage through the home's exterior envelope — walls, doors, windows, and other openings. A duct tightness test measures air leakage from the HVAC duct system. Both tests help identify where conditioned air is escaping, but they focus on different parts of the building.

How long does testing take?

Testing typically takes 1 to 3 hours depending on the property size, number of HVAC systems, vent count, and site readiness. A single blower door test may take about an hour, while duct testing with multiple systems can take longer.

How should I prepare the property?

Ensure all exterior doors and windows are closed, accessible, and in normal operating condition. Turn off HVAC systems before testing. Make sure the technician has clear access to the attic, mechanical room, and all vents. Remove any obstructions around vents and access points.

Can both tests be completed during the same visit?

Yes, both blower door and duct tightness tests can be completed during the same visit. This is often more convenient and may be more cost-effective than scheduling separate appointments.

How do I count HVAC systems?

Count each independent HVAC unit as one system. A typical home may have one or two systems, but larger homes can have more. If you're unsure, we can help you determine the correct count during scheduling.

What counts as a vent?

A vent is any supply or return register connected to the HVAC duct system. This includes ceiling vents, floor vents, wall registers, and return air grilles. Each vent is counted separately for the purpose of duct tightness testing.

What happens if a system has more than 20 vents?

Each HVAC system includes up to 20 vents in the standard testing price. For systems with more than 20 vents, an additional charge of $20 per vent applies. This is calculated per system, so the 20-vent allowance resets for each HVAC system being tested.

Is same-day testing guaranteed?

Same-day service is subject to technician availability and service-area confirmation. It is not guaranteed. We add a $150 priority fee for same-day scheduling when available.

Will I receive documentation after testing?

Yes, you will receive professional testing documentation with your results. The format and detail of the documentation depends on the testing requirements and your specific needs.

Do I need testing for my permit or inspection?

Testing requirements vary by jurisdiction, building department, and project type. We recommend confirming exact requirements with your building department, inspector, contractor, or HVAC professional before scheduling.

Can you test an existing home?

Yes, we test both new construction and existing homes. Existing-home testing is often requested for energy-efficiency diagnostics, comfort problems, high utility bills, or suspected air or duct leakage.

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Blower door testing with red fan and diagnostic instruments in a North Central Florida home

Blower Door & Duct Tightness Testing

Blower Door & Duct Tightness Testing in North Central Florida

Fast, professional testing for permits, inspections, new construction, HVAC projects, and existing-home diagnostics.

Clear, upfront pricing•Convenient scheduling•Professional testing documentation•Same-day service when available

Local North Central Florida Service

Clear Upfront Pricing

Professional Test Results

Same-Day Appointments Available

Pricing

Clear, Upfront Testing Prices

No hidden fees. Know your cost before you book.

Blower Door Test

$249

Measures air leakage through the home's exterior envelope to help identify unwanted air infiltration and evaluate overall building tightness.

On-site blower door testing
Air leakage measurement
Building envelope evaluation

20 vents included per system

Duct Tightness Test

$399 per HVAC system

Includes testing for up to 20 supply and return vents per HVAC system.

Up to 20 vents per system
Additional vents: $20 each
Per HVAC system — allowance resets for each system

Same-Day Service

+$150

Priority same-day scheduling, subject to technician availability and service-area confirmation.

Priority scheduling
Subject to availability
Service-area confirmation required

Same-day service is not guaranteed.

Additional vents over 20: $20 per vent. The 20-vent allowance applies separately to each HVAC system being tested.

Estimate Your Testing Cost

Select Your Tests

Estimated Testing Total$0

This estimate is based on the information provided. Final pricing is confirmed after verifying the property location, number of HVAC systems, vent counts, testing requirements, and appointment availability.

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Who Needs Testing

Common Reasons Customers Request Testing

Blower door and duct tightness testing is requested for a variety of reasons — from permit requirements to comfort diagnostics. Not every project requires both tests, but here are the most common scenarios we see in North Central Florida.

New-construction permit or inspection requirements

Final building inspections

HVAC replacement or ductwork installation

Energy-efficiency diagnostics

Comfort problems and uneven temperatures

High utility bills

Suspected air or duct leakage

Remodeling or building-envelope improvements

What Each Test Measures

Blower Door Testing & Duct Tightness Testing in North Central Florida

Blower Door Testing

Measures how much air leaks through the home's exterior envelope, including leakage around doors, windows, penetrations, attic access points, and other building-envelope areas.

Duct Tightness Testing

Measures air leakage from the HVAC duct system to help evaluate whether conditioned air is escaping before reaching the intended rooms.

What to Expect

A Simple, Straightforward Process

Request an appointment

Submit your testing request online or call us. Tell us what your project requires.

Confirm property and system details

We verify the property location, number of HVAC systems, vent counts, and testing requirements.

Complete on-site testing

Our technician performs the blower door and/or duct tightness test at your property.

Receive results and documentation

You receive professional testing results and applicable documentation after testing is complete.

Testing duration depends on the property, access, system count, vent count, and site readiness. A typical visit ranges from 1 to 3 hours.

Why Choose Us

Dependable, Local Testing You Can Trust

Local North Central Florida service

Straightforward published pricing

Convenient scheduling

Clear communication

Professional testing equipment

Results explained in plain language

Experience working with homeowners and construction professionals

Service Area

Serving North Central Florida

Cities & Communities

GainesvilleAlachuaNewberryHigh SpringsLake CityLive OakTrentonWillistonOcalaand surrounding communities

Counties

Alachua CountyColumbia CountyGilchrist CountyUnion CountyBradford CountyLevy CountyNorthern Marion County

Service availability and travel charges should be confirmed for addresses outside the normal coverage area. Call us to confirm your location.

Need Your Testing Scheduled?

Tell us what your project requires and we'll confirm the testing scope, pricing, and earliest available appointment.

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