can you recommend a roof cap for this blower, and will it need a built in damper on the cap or not?
Thank you for question on the HLB3 in-line blower. This blower uses an 8" round duct size with the option of expanding this to a 10". We do recommend purchasing a roof cap with a built-in backdraft damper. The model 634 or 644 would be our roof caps for an 8" round duct size with a built-in backdraft damper and bird screen. If you decided to use the 10" duct you would require an additional 414 to transition from 8" to 10". The 10" round roof cap is the model 437. The 437 has a built-in spring-loaded backdraft damper and bird screen. If you have further questions, please contact Technical Support directly at 800-637-1453.
Date published: 2016-07-01