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  2. Health Experts Explain Why You Should Avoid Window AC Units ...

    www.aol.com/health-experts-explain-why-never...

    If you have central air conditioning units, running your AC system when there's wildfire smoke or other widespread air pollution outside won't put you at greater risk for breathing issues — in ...

  3. Is it dangerous to run your AC when air quality is bad? - AOL

    www.aol.com/news/dangerous-run-ac-air-quality...

    Use an air purifier, or an air conditioner that pulls in inside air and has an up-to-date, effective air filter. If your air purifier is small, run it in a smaller room and say in there as much as ...

  4. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    A single-stage furnace has only one stage of operation, it is either on or off. This means that it is relatively noisy, always running at the highest speed, and always pumping out the hottest air at the highest velocity. One of the benefits to a single-stage furnace is typically the cost for installation.

  5. Constant air volume - Wikipedia

    en.wikipedia.org/wiki/Constant_air_volume

    Constant air volume (CAV) is a type of heating, ventilating, and air-conditioning system. In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space. [1] Most CAV systems are small, and serve a single thermal zone.

  6. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Hose systems, which can be monoblock or air-to-air, are vented to the outside via air ducts. The monoblock type collects the water in a bucket or tray and stops when full. The air-to-air type re-evaporates the water, discharges it through the ducted hose, and can run continuously. Many but not all portable units draw indoor air and expel it ...

  7. How Often Should You Clean Your Air Ducts? Experts Explain - AOL

    www.aol.com/often-clean-air-ducts-experts...

    Cleaning air ducts every three to five years is important to ensure the system is running at capacity and can reduce dust and mold in the home. According to Fourner, benefits of cleaning air ducts ...