Aeroseal FAQ: Analyzing Duct Leakage for Your Energy Model
Continuing their FAQ Webinar series, Aeroseal’s John Harrington, Director of Application Engineering, and April Frakes, Directors of Commercial Sales, walk through Aeroseal’s duct energy models that are used to analyze duct leakage and can be used to inform a project’s energy model.
Aeroseal’s commercial duct experts started the webinar noting four key points to remember when it comes to their duct energy models.
Operational Overview
Understanding how the Aeroseal system produces energy savings is key. Aeroseal seals leaks so the HVAC system doesn’t have to work as hard, saving energy.
The Aeroseal system takes baseline leakage measurements prior to the seal, then measures again post seal. The CFM sealed or percent leakage is used in their energy model.
Approach
The approach depends on the level of leakage happening in each system.
Calculations
“A small reduction in motor speed leads to a large reduction in power.”
Keep in mind that 20 percent change in CFM does not mean a 20 percent reduction in fan power.
“A small reduction in motor speed leads to a large reduction in power.”
Energy Model
There are four main energy model types Aeroseal utilizes:
- Constant Air Volume with Changeover (Only Heating or Cooling mode)
- Variable Air Volume with Changeover (Only Heating or Cooling mode)
- Variable Air Volume without Changeover (VAV Boxes with heat exterior zones, cooing only VAV Boxes interior)
- Constant Volume Exhaust
Learn more about these energy models, in the full-length recording below. And click here to sign up for the next FAQ webinar focusing on Aeroseal’s project auditing process.