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  2. 50 Divisions - Wikipedia

    en.wikipedia.org/wiki/50_Divisions

    The latest officially released version of MasterFormat is the 2018 Edition, which uses the following Divisions: PROCUREMENT AND CONTRACTING REQUIREMENTS GROUP:

  3. ASHRAE Handbook - Wikipedia

    en.wikipedia.org/wiki/ASHRAE_Handbook

    Members of ASHRAE receive the current volume, in both print and CD-ROM form, each year as a basic membership benefit. An enhanced electronic version, known as ASHRAE Handbook Online is a web-based version updated annually that contains the four latest volumes as well as extra content such as calculations, demonstration videos, and spreadsheets.

  4. Submittals (construction) - Wikipedia

    en.wikipedia.org/wiki/Submittals_(construction)

    The product data submittal usually consists of the manufacturer's product information. The information included in this submittal are: Manufacturer, trade name, model or type number and quantities: This information is necessary to compare the submitted item with the specified products and acceptable products listed, in the specification and addenda.

  5. Variable air volume - Wikipedia

    en.wikipedia.org/wiki/Variable_air_volume

    Air volume regulator. Variable air volume (VAV) is a type of heating, ventilating, and/or air-conditioning system.Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant or varying temperature.

  6. Heating, ventilation, and air conditioning - Wikipedia

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

    For very small buildings, contractors normally estimate the capacity and type of system needed and then design the system, selecting the appropriate refrigerant and various components needed. For larger buildings, building service designers, mechanical engineers, or building services engineers analyze, design, and specify the HVAC systems.

  7. Minimum efficiency reporting value - Wikipedia

    en.wikipedia.org/wiki/Minimum_Efficiency...

    Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers to report the effectiveness of air filters in more detail than other ratings.

  8. Air Conditioning, Heating and Refrigeration Institute - Wikipedia

    en.wikipedia.org/wiki/Air_Conditioning,_Heating...

    Logo. The Air Conditioning, Heating, and Refrigeration Institute (AHRI), formed in 2008 by a merger of the Air-Conditioning and Refrigeration Institute (ARI) and the Gas Appliance Manufacturers Association (GAMA), is a North American trade association of manufacturers of air conditioning, heating, and commercial refrigeration equipment.

  9. Radiant heating and cooling - Wikipedia

    en.wikipedia.org/wiki/Radiant_heating_and_cooling

    Heat radiation is the energy in the form of electromagnetic waves emitted by a solid, liquid, or gas as a result of its temperature. [37] In buildings, the radiant heat flow between two internal surfaces (or a surface and a person) is influenced by the emissivity of the heat emitting surface and by the view factor between this surface and the ...

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