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  2. Glossary of construction cost estimating - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_construction...

    A Allocation of costs is the transfer of costs from one cost item to one or more other cost items. Allowance - a value in an estimate to cover the cost of known but not yet fully defined work. As-sold estimate - the estimate which matches the agreed items and price for the project scope. B Basis of estimate (BOE) - a document which describes the scope basis, pricing basis, methods ...

  3. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    1. Components made of multiple smaller blades, sometimes adjustable, placed in ducts or duct entries to control the volume of air flow. When used inside of ducts, their function is similar to that of a damper, but they can be manufactured to fit larger openings than a single-piece damper. 2.

  4. Process duct work - Wikipedia

    en.wikipedia.org/wiki/Process_Duct_Work

    Fabric joints are often chosen to separate the duct segments because they usually cost 40% less than metal joints. Also metal joints place an additional loads onto duct segments. Metal joints prefer axial movements, and provide significant lateral loads onto duct segments. fabric joints cost $100 to $200 per square foot of joint (2010).

  5. Duct leakage testing - Wikipedia

    en.wikipedia.org/wiki/Duct_leakage_testing

    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. List of cleaning companies - Wikipedia

    en.wikipedia.org/wiki/List_of_cleaning_companies

    ISS A/S – a facility services company founded in Copenhagen, Denmark in 1901. Jani-King – an American chain and franchise of cleaning services. [4] Merry Maids – a residential cleaning service franchisor founded in 1979, acquired by ServiceMaster in 1988, with franchises in the United States, Canada and the United Kingdom. [5]

  7. Building services engineering - Wikipedia

    en.wikipedia.org/wiki/Building_services_engineering

    The two most notable professional bodies are: The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) was founded in 1894.; The British Chartered Institution of Building Services Engineers (CIBSE) was founded in 1976 and received a Royal Charter in the United Kingdom, formally recognising building services engineering as a profession.

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