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2. Attic fan - Wikipedia

   en.wikipedia.org/wiki/Attic_fan

   An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...

3. Rooftop solar power - Wikipedia

   en.wikipedia.org/wiki/Rooftop_solar_power

   The average installed cost of residential solar, meanwhile, dropped 21 percent to $2.84 per watt-dc in the first quarter of 2017 versus first quarter 2015." [16] In fact, in eight states the group studied, the total government incentives for installing a rooftop solar PV system actually exceeded the cost of doing so. [17]

4. Solar shingle - Wikipedia

   en.wikipedia.org/wiki/Solar_shingle

   According to Dow Chemical Company reports, a typical residential install consisting of 350 solar shingles can cost at least $20,000; however, federal and state incentives depending on the location might significantly bring down the cost. [4] Solar contractors typically offer homeowners a full-service price for solar installation, which includes ...

5. Photovoltaic mounting system - Wikipedia

   en.wikipedia.org/wiki/Photovoltaic_mounting_system

   These mounting systems generally enable retrofitting of solar panels on roofs or as part of the structure of the building (called BIPV). [2] As the relative costs of solar photovoltaic (PV) modules has dropped, [3] the costs of the racks have become more important and for small PV systems can be the most expensive material cost. [4]

6. Roofer - Wikipedia

   en.wikipedia.org/wiki/Roofer

   A roofer, roof mechanic, or roofing contractor is a tradesman who specializes in roof construction. Roofers replace, repair, and install the roofs of buildings, using a variety of materials, including shingles, single-ply, bitumen, and metal. Roofing work includes the hoisting, storage, application, and removal of roofing materials and ...

7. Passive solar building design - Wikipedia

   en.wikipedia.org/wiki/Passive_solar_building_design

   Passive solar building design sometimes uses limited electrical and mechanical controls to operate dampers, insulating shutters, shades, awnings, or reflectors. Some systems enlist small fans or solar-heated chimneys to improve convective air-flow. A reasonable way to analyse these systems is by measuring their coefficient of performance. A ...