Tamarack Technologies HV1000 R38 Ductless Whole House Fan

The Tamarack Technologies HV-1000 R38 is a unique ductless whole house fan that focuses on sealing up when it’s not running. It uses self-sealing insulated doors with an R38 rating to create an airtight seal, helping prevent the attic air leakage you can get with other designs. It’s rated at 1150 CFM and can fit either 16-inch or 24-inch on-center joists.

Pros

+Self-sealing insulated doors (R38) help create an airtight seal when off
+Dampers open automatically during use and close when shut off
+Fits 16-inch or 24-inch on-center joists

Cons

-Lower CFM (1150) than many larger whole house fan systems
-May not be the best fit for larger homes needing higher airflow

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Tamarack Technologies HV1000 R38 Ductless Whole House Fan

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Highlights

+Self-sealing insulated doors (R38) help create an airtight seal when off
+Dampers open automatically during use and close when shut off
+Fits 16-inch or 24-inch on-center joists

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