Due to the unique nature of the Aeroseal Process and the application equipment required, only trained technicians can apply Aeroseal duct sealing. Our staff have been trained by an Aeroseal LLC (USA) Technical Manager. See Media for Training Certificates. To complete larger projects in a single session we will use experienced HVAC Hygiene technicians to block the ducts in preparation for sealing and unblocking after sealing. This minimises down time for the system. It is often done overnight with minimal interruption to tenant’s staff or operations.