Duct Blast Testing

Assess Tightness and Efficiency of Duct Systems

All Purpose Consultants (APC) is a trusted RESNET-accredited HERS Provider specializing in duct blast testing. Our team brings years of experience in measuring and evaluating duct systems to help builders, contractors, and homeowners achieve energy efficiency and code compliance.

We conduct comprehensive duct blast tests to assess the tightness and efficiency of duct systems. Using advanced equipment like the Duct Blaster, we measure airflow and identify leaks that waste energy or cause performance issues. Our tests provide clear, actionable results to improve HVAC system performance and meet Florida’s building codes.

Why Choose Us?

  • Certified RESNET professionals delivering accurate and reliable results.
  • Prompt service with detailed reporting to keep your projects on schedule.
  • Commitment to helping clients achieve energy efficiency and reduce costs.
  • Extensive expertise in energy compliance and duct system testing.

Understanding Duct Blast Testing

Duct blast testing is a diagnostic process that evaluates the tightness and efficiency of a home’s duct system. By pressurizing or depressurizing the ducts with a Duct Blaster, the test measures how much air is leaking from the system. This information is crucial for improving energy efficiency and meeting building code requirements.

Energy Savings

Leaky ducts waste significant energy, driving up utility costs and overworking HVAC systems.

Code Compliance

Many Florida building codes and green certifications require duct systems to meet specific leakage thresholds.

Indoor Comfort

Properly sealed ducts ensure consistent temperatures throughout the home, eliminating hot or cold spots.

Moisture Control

Sealing ducts helps prevent moisture issues, mold growth, and structural damage.

How Duct Blast Testing Works

Duct blast testing is a straightforward yet highly effective method for evaluating the tightness and efficiency of a duct system. By simulating real-world pressure conditions, this test identifies how much air is leaking from the system, providing valuable insights into its performance. Below is a step-by-step breakdown of how the process works:

01

System Preparation
All supply registers and return grilles are sealed with polyethylene and tape. The air handler fan is turned off to isolate the duct system.

02

Pressurization
A Duct Blaster is attached to the duct system, typically at a large return-air grille or near the furnace. The system is pressurized to 25 Pascals to simulate typical operating conditions.

03

Leakage Measurement
A manometer connected to the Duct Blaster measures the airflow required to maintain the pressure, which quantifies the duct system’s leakiness.

Duct Blast Testing FAQ

Why should I have a duct blast test performed?

Duct blast tests help improve energy efficiency, meet code requirements, and reduce HVAC costs by identifying and addressing leaks.

A blower door test measures air leakage from the entire home, while a duct blast test specifically evaluates leaks in the duct system.
Duct blast tests must be performed by certified professionals, like the RESNET-certified team at APC.
The test measures overall leakage but does not pinpoint specific locations. Additional diagnostic tools, like fog machines, can be used for precise leak detection.
Yes, many Florida building codes require duct testing for systems outside the home’s thermal envelope to ensure they meet leakage thresholds.
Sealing ducts improves energy efficiency, enhances indoor comfort, prevents moisture issues, and reduces utility bills.