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2. No, You Don't Need to Clean Your Air Ducts Every Year ... - AOL

   www.aol.com/no-dont-clean-air-ducts-110500245.html

   How to Clean Your Air Ducts If you do decide to clean your own air ducts, our step-by-step guide can help you do it correctly. You can also make things easy on yourself by choosing the right HVAC ...

3. Is your heater making you sick? How to avoid cold-like ...

   www.aol.com/lifestyle/heater-making-sick-avoid...

   The dry air produced by heating systems can irritate your nasal passages and throat, which can in turn cause discomfort, Lizarzaburu adds. Dry air can also make it harder to fight off colds.

4. Kitchen exhaust cleaning - Wikipedia

   en.wikipedia.org/wiki/Kitchen_exhaust_cleaning

   Before and after pictures of commercial kitchen hood in North Bay, Ontario.. Kitchen exhaust cleaning (often referred to as hood cleaning) is the process of removing grease that has accumulated inside the ducts, hoods, fans and vents of exhaust systems of commercial kitchens.

5. Duct leakage testing - Wikipedia

   en.wikipedia.org/wiki/Duct_leakage_testing

   Duct leakage test in the US. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.

6. Air sanitizer - Wikipedia

   en.wikipedia.org/wiki/Air_sanitizer

   Air circulators treat a fractional room volume per unit time and exhaust the treated air back into the room, resulting in fractional air dilution. By contrast, air sanitizers that are maintained at a sufficient and homogeneous concentration within the interior air space provide simultaneous treatment of the entire interior air space volume but ...

7. 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 ...