Final answer:
An attic fan's installation depends on the attic's ventilation, roof material, and the level of attic insulation. These factors ensure proper air flow, compatibility, and support in temperature regulation, which are all essential for the fan's performance. Option B is correct.
Step-by-step explanation:
The three factors that determine if an attic fan can be installed are: attic ventilation, roof material, and attic insulation. Attic ventilation is crucial as it allows for proper air flow, reducing excess heat and moisture which can lead to mold and structural damage.
The roof material affects the type of attic fan that can be installed because some materials may require different mounting options or may not be suitable for certain types of fans. Additionally, attic insulation plays a role since insulation helps in maintaining the desired temperature within the house, and the effectiveness of the fan in aiding temperature regulation can be impacted by the insulation level.
How much it takes to maintain temperature in a house depends on the heat flow which is related to the windows, walls, ceiling, and floor. Therefore, the condition and quality of attic insulation can directly influence the performance and necessity of an attic fan. Properly assessing these three points ensures the successful installation and operation of an attic fan.