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  2. R-407C - Wikipedia

    en.wikipedia.org/wiki/R-407C

    R407C offers several notable benefits: Replacement for R22: Often used as a direct substitute for R22 in many existing systems, facilitating upgrades with minimal system modifications. High Efficiency: Provides effective cooling with good energy efficiency.

  3. List of New York City Subway R-type contracts - Wikipedia

    en.wikipedia.org/wiki/List_of_New_York_City...

    R22: 7300–7749 1957–1958 ... Door operator mechanism R65: Pump cars PC01–PC03 ... Replace Coney Island Yard cranes (planning MW104111)

  4. List of refrigerants - Wikipedia

    en.wikipedia.org/wiki/List_of_refrigerants

    The table is sortable by each of the following refrigerant properties (scroll right or reduce magnification to view more properties): Type/prefix (see legends); ASHRAE number

  5. Sliding glass door - Wikipedia

    en.wikipedia.org/wiki/Sliding_glass_door

    Sliding glass door frames are often made from wood, aluminum, stainless steel, or steel, which also have the most strength. The most common material is PVC plastic. Replacement parts are most commonly needed for the moving-sliding parts of the door, such as the steel rollers that glide within the track and the locking mechanisms.

  6. Insulated glazing - Wikipedia

    en.wikipedia.org/wiki/Insulated_glazing

    A typical installation of insulated glass windows with uPVC frames. Possibly the earliest use of double glazing was in Siberia, where it was observed by Henry Seebohm in 1877 as an established necessity in the Yeniseysk area where the bitterly cold winter temperatures regularly fall below -50 °C, indicating how the concept may have started: [2]

  7. R-407A - Wikipedia

    en.wikipedia.org/wiki/R-407A

    R-407A is a mixture of gasses used as a refrigerant.It is a zeotropic blend of difluoromethane (HFC-32), pentafluoroethane (HFC-125) and 1,1,1,2-tetrafluoroethane (HFC-134a). [1]