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  2. The best smart speakers for seniors in 2023 - AOL

    www.aol.com/lifestyle/best-smart-home-speakers...

    Alexa-powered Echo devices can also make phone calls, either to numbers in your contact list (which can be imported into the Alexa app) or any number you ask Alexa to dial. One exception: 911.

  3. Panasonic - Wikipedia

    en.wikipedia.org/wiki/Panasonic

    PT Panasonic Gobel Indonesia (formerly known as PT National Gobel and PT National Panasonic Gobel) is the name of the company's Indonesia division based in Cawang, East Jakarta. Tomonobu Otsu is the current President Director and Rachmat Gobel is the current President Commissioner. It is a joint venture between Panasonic Corporation Japan and ...

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

  5. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    The system normally has eight main components: a compressor, a reservoir, a reversing valve which selects between heating and cooling mode, two thermal expansion valves (one used when in heating mode and the other when used in cooling mode) and two heat exchangers, one associated with the external heat source/sink and the other with the ...

  6. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Sealed systems offer an alternative to open-vent systems, in which steam can escape from the system, and gets replaced from the building's water supply via a feed and central storage system. Heating systems in the United Kingdom and in other parts of Europe commonly combine the needs of space heating with domestic hot-water heating.

  7. Space heater - Wikipedia

    en.wikipedia.org/wiki/Space_heater

    A space heater is a device used to heat a single, small- to medium-sized area. [1] This type of heater can be contrasted with central heating , which distributes heat to multiple areas. Types

  8. Register (air and heating) - Wikipedia

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

    Usually, a register is placed near a window or door, which is where the greatest heat/cooling loss occurs. [4] [5] In contrast, returns (grilled ducts which suck air back into the HVAC system for heating or cooling) are usually placed in the wall or ceiling nearest the center of the building. Generally, in rooms where it is critical to maintain ...

  9. Radiant heating and cooling - Wikipedia

    en.wikipedia.org/wiki/Radiant_heating_and_cooling

    Underfloor heating systems—electric or hydronic; Wall heating systems; Radiant ceiling panels; Underfloor and wall heating systems often are called low-temperature systems. Since their heating surface is much larger than other systems, a much lower temperature is required to achieve the same level of heat transfer. This provides an improved ...