Category: Tools & Home Improvement Vendor: High Energy Factor (EF) Ratings - These models qualify for most energy rebate programs Advanced ScreenLok? Technology Flame Arr Product Description : These models are the most energy efficient, atmospheric vent residential product we offer. Additional insulation and integral heat traps combine to reduce stand-by heat loss. The additional insulation also helps these models achieve Energy Factor (EF) ratings that qualify for most utility rebate programs.
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