And installed on a flat roof or wall. The air through the black felt gap (air intake volume remains unchanged) can efficiently absorb the heat of the sun, thereby increasing the temperature of the outdoor fresh air entering the room.As long as the felt cover is spliced, the temperature of the fresh air entering the room can be increased: F7----about 10; F11----about 15; F20----about 20. After a long period of outdoor dust and rain test, the air intake volume is reduced by up to 3%.
It can effectively filter Dust and become clean after rain washing, no maintenance is required. The service life is more than 5 years. The item "Felt cover F7 Solar air heater Fan Ventilator Heating panel Dehumidifier Heat" is in sale since Sunday, February 28, 2021. This item is in the category "Home & Garden\Home Improvement\Electrical Supplies\Alternative Energy Supplies\Solar Power Supplies\Solar Panels & Kits".The seller is "nakoair-solarairheater" and is located in Minneapolis, Minnesota. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.