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2. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space.

3. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...

4. Register (air and heating) - Wikipedia

   en.wikipedia.org/wiki/Register_(air_and_heating)

   If not properly installed and tightly connected to the ductwork, air will spill around the register and greatly reduce the HVAC system's efficiency. [5] Ideally, a room will have both heating and cooling registers. In practice, cost considerations usually require that heating and cooling be provided by the same register.

5. Should You Close Vents In Unused Rooms During Winter? An HVAC ...

   www.aol.com/lifestyle/close-vents-unused-rooms...

   Here’s what homeowners need to know. Home & Garden. Medicare

6. 5 Retirement Splurges That Can Save You Money in the Long Run

   www.aol.com/finance/5-retirement-splurges-save...

   Heating and cooling costs can rise as a house and its equipment age, but there are ways to reduce those bills. Investing in better insulation and sealing leaky ductwork can lower energy use and ...

7. The Most Important Place You're Probably Forgetting To Dust - AOL

   www.aol.com/most-important-place-youre-probably...

   “Professional duct cleaning allows technicians to reach deep into your ductwork with special vacuums and spray gentle disinfectants that can help keep your ducts cleaner for months to come ...