The High Efficiency powered attic ventilator comes with a ECM - Electronically Commutated Motor with an on-board computer to monitor and adjust to the temperature and humidity in the attic. The variable speed motor provides a quiet start up and reduces wear and tear on the motor while minimizing electricity consumption. On average， The HE15 consumes about $20 electricity costs annually; which is about $60 less per year compared to traditional power fan running 4 hours a day at average electricity costs. This is due to the unique motor and on-board computer that monitors and adjusts to the conditions in the attic. It features a low-profile dome， the power fan is unobtrusive when installed on the back side of your roof.
Soft start motor provides a quiet start up and reduces wear and tear
On-board computer with temperature and humidity sensors monitor attic conditions
Pre-wired humidistat/thermostat
Up to 74% energy savings
Suitable for 3/12 to 8/12 roof pitch
Ventilates up to 2，100 sq. ft. of attic space
Part of a balanced attic ventilation system for year-round airflow
Helps to fight heat and moisture buildup inside an attic as well as ice dams in cold climates
Requires intake ventilation for proper performance
Use the Home Depot online calculator to determine how many are needed for each attic
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