Dual commercial-grade high-CFM attic ventilation fans installed to regulate roof-space heat buildup, dramatically lowering summer air conditioning cooling loads.
Engineered an energy-saving attic airflow evacuation solution for the multi-story Greenwich Woods commercial facility in Fairfield County. Installed dual high-velocity louvered fans driven by digital dual-temperature and relative humidity sensors.
Severe attic heat build-up exceeding 140°F was overloading rooftop air handlers, causing frequent HVAC breaker trips and excessive utility bills.
Ran dedicated 20A branch circuits from the third-floor commercial panel to automated dual-speed exhaust fans with emergency fire-rated fusible thermal link disconnect switches.
Commercial and residential installations utilize commercial-grade, UL-listed hardware meeting NEC 2023 specifications:
| Component Description | Quantity | Manufacturer |
|---|---|---|
| Commercial High-Velocity Gable Exhaust Fan (3,500 CFM) | 2 | Air King |
| Digital Line-Voltage Thermostat & Dehumidistat Controller | 2 | Honeywell |
| 12/2 Solid Metal Clad (MC) Armor Cable | 120 ft | Southwire |
| Fire-Safety Thermal Cutoff Disconnect Switch | 2 | Square D |
This project was installed by a Connecticut Licensed Master Electrician (License #191788-E1) following Article 215 (Feeders), Article 240 (Overcurrent Protection), Article 250 (Grounding and Bonding), and Article 408 (Switchboards and Panelboards).
Grounding verified: Continuous equipment grounding conductor bonded to branch panel. Surge Protective Device (SPD) integrated: Yes, Type 1/2 Whole-System.
