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  2. Markup (business) - Wikipedia

    en.wikipedia.org/wiki/Markup_(business)

    Markup (or price spread) is the difference between the selling price of a good or service and its cost.It is often expressed as a percentage over the cost. A markup is added into the total cost incurred by the producer of a good or service in order to cover the costs of doing business and create a profit.

  3. Register (air and heating) - Wikipedia

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

    A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system. The placement and size of registers is critical to HVAC efficiency. Register dampers are also important, and can serve a safety function.

  4. Cooling load temperature difference calculation method

    en.wikipedia.org/wiki/Cooling_load_temperature...

    The CLTD/CLF/SCL (cooling load temperature difference/cooling load factor/solar cooling load factor) cooling load calculation method was first introduced in the 1979 ASHRAE Cooling and Heating Load Manual (GRP-158) [1] The CLTD/CLF/SCL Method is regarded as a reasonably accurate approximation of the total heat gains through a building envelope ...

  5. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    The study of the behavior of air-water vapor mixtures. Water vapor plays an important role in energy transfer and human comfort in HVAC design. rooftop unit (RTU) A packaged unit that controls both heating and air conditioning. An air handler typically refers to a unit that provides a fan to support either heating or cooling. radiant ceiling panels

  6. Heat pump and refrigeration cycle - Wikipedia

    en.wikipedia.org/wiki/Heat_pump_and...

    Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

  7. Watsco - Wikipedia

    en.wikipedia.org/wiki/Watsco

    Watsco, Inc. is a distributor of air conditioning, heating and refrigeration equipment, and related parts and supplies (HVAC/R) in the United States. [2] Watsco was founded more than 60 years ago as a manufacturer of parts, components, and tools used in the HVAC/R industry.

  8. Heating seasonal performance factor - Wikipedia

    en.wikipedia.org/wiki/Heating_seasonal...

    Heating seasonal performance factor (HSPF) is a term used in the heating and cooling industry. HSPF is specifically used to measure the efficiency of air source heat pumps.

  9. Cost-plus pricing - Wikipedia

    en.wikipedia.org/wiki/Cost-plus_pricing

    Ultimately, the $54 markup price is the shop's margin of profit. Cost-plus pricing is common and there are many examples where the margin is transparent to buyers. [ 4 ] Costco reportedly created rules to limit product markups to 15% with an average markup of 11% across all products sold. [ 5 ]

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