What is a Duct Leakage Test?- IECC Code Compliance-Maryland
Simply put, a Duct Test is a leakage test required in Maryland in order to recieve U&O, read more below!!
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WHAT IS A DUCT TEST? AKA: DUCT LEAKAGE TEST, DUCT BLASTER, DUCT BLASTER TEST, DUCT TESTING, OR DUCT PRESSURE TEST
A duct test, also known as a duct leakage test, is a diagnostic test performed on the HVAC (heating, ventilation, and air conditioning) system of a building to determine the amount of air leakage from the ductwork. The test involves pressurizing the ductwork and measuring the amount of air that leaks out of the system. The results of the test can help identify areas where the ductwork is leaking, and this information can be used to improve the energy efficiency of the HVAC system by sealing the leaks. The test is typically performed by a trained technician using specialized equipment, and it is often required by building codes and energy efficiency standards.
WHAT IS THE MARYLAND CODE REQUIREMENT FOR DUCT TESTING IN MARYLAND?
The code for duct testing in Maryland is based on the International Energy Conservation Code (IECC) 2018. According to this code, all new residential and commercial buildings in Maryland are required to have their HVAC duct systems tested for air leakage.
The duct testing requirements in Maryland mandate that the ductwork should be tested to verify that it has been installed and sealed in accordance with the applicable building codes and standards. The test must be conducted by a qualified technician using specialized equipment, such as a duct blaster, to measure the amount of air leakage in the duct system.
The code requires that the maximum allowed leakage rate for residential buildings is 4 cubic feet per minute (CFM) per 100 square feet of conditioned floor area, or 8 CFM per 100 square feet for commercial buildings. The test must be conducted at a pressure of 25 Pascals and the results should be recorded on a form that includes the test date, location, and technician’s name.
It is important to note that the duct testing requirements may vary depending on the specific jurisdiction in Maryland. It is recommended to consult with local building officials or a qualified HVAC contractor to ensure compliance with all applicable codes and standards.
HOW DO YOU PASS A DUCT TEST IN MARYLAND?
To pass a duct test in Maryland, you will need to prepare your HVAC system to meet the state's requirements for duct leakage. Here are some general steps you can follow to prepare for a duct test:
Check for visible leaks: Visually inspect your ductwork for any visible leaks or damage. Repair or replace any damaged sections of ductwork.
Seal air leaks: Use duct sealant or metal tape to seal any air leaks in your ductwork. Common areas where leaks occur include connections between duct sections and around vents.
Insulate ductwork: Make sure that all exposed ductwork in unconditioned spaces, such as attics and crawl spaces, is properly insulated to prevent energy loss.
Check air flow: Make sure that the airflow in your HVAC system is balanced and that there are no obstructions or blockages in your ductwork.
Schedule a duct test: Contact a licensed professional like us to schedule a duct test. The contractor will use specialized equipment to pressurize your ductwork and measure the amount of air leakage.
By following these steps, you can improve the energy efficiency of your HVAC system and increase your chances of passing a duct test in Maryland.
CALL, EMAIL, OR SCHEDULE A DUCT TEST BELOW
