The device that captures heat from building exhaust air and transfers it to fresh air entering the building is known as what?

The device that captures heat from building exhaust air and transfers it to fresh air entering the building is known as what?

• A. HRV
• B. ERV
• C. AHU
• D. Boiler

Answer: (A)

Heat recovery ventilation is the idea here. It uses a heat exchanger to pull warmth from the stale air leaving the building and transfer that warmth to the incoming fresh air. That preheats the incoming air before it mixes with indoor air, which lowers the heating load and boosts energy efficiency in cold weather. An energy recovery ventilator (ERV) is similar but also transfers some moisture to balance humidity; the question emphasizes heat transfer, so the device described is best called a heat recovery ventilator. The other options don’t match this specific heat-exchange function: an air handling unit conditions and moves air but isn’t defined by recovering heat from exhaust to intake, and a boiler is simply a heat source.

Heat recovery ventilation is the idea here. It uses a heat exchanger to pull warmth from the stale air leaving the building and transfer that warmth to the incoming fresh air. That preheats the incoming air before it mixes with indoor air, which lowers the heating load and boosts energy efficiency in cold weather. An energy recovery ventilator (ERV) is similar but also transfers some moisture to balance humidity; the question emphasizes heat transfer, so the device described is best called a heat recovery ventilator. The other options don’t match this specific heat-exchange function: an air handling unit conditions and moves air but isn’t defined by recovering heat from exhaust to intake, and a boiler is simply a heat source.