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  2. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    The supply pipe supplies either cold or hot water to the unit depending on the time of year. Four-pipe fan coil units have two supply pipes and two return pipes. This allows either hot or cold water to enter the unit at any given time. Since it is often necessary to heat and cool different areas of a building at the same time, due to ...

  3. Air purge system - Wikipedia

    en.wikipedia.org/wiki/Air_purge_system

    Filter Blocked – Only low trip operated; An air purge heating unit is used to ensure that the purge air remains at a temperature above the acid dew-point. This temperature is typically around 20 °C/68 °F. [2] If temperatures are below this point, the controls will be corroded by condensation of compounds in the flue gas.

  4. Drain cleaner - Wikipedia

    en.wikipedia.org/wiki/Drain_cleaner

    A drain cleaner, also known as drain opener, refers to a person, device, or product used to unblock sewer pipes or clear clogged wastewater drains.This term typically applies to chemical, enzymatic, or mechanical tools such as commercial chemical cleaners, plumber’s snakes, drain augers, bio-enzyme solutions, or toilet plungers.

  5. Prepare for the coldest Arctic blast: How to keep your pipes ...

    www.aol.com/prepare-coldest-artic-blast-keep...

    Pipes exposed to "severe cold" including outdoor hose bibs, swimming pool supply lines, and water sprinkler lines. (If you have swimming pool or sprinkler supply lines, they needed drained too.)

  6. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    The supply plenum directs air from the central unit to the rooms which the system is designed to heat. Regardless of type, all air handlers consist of an air filter, blower, heat exchanger/element/coil, and various controls. Like any other kind of central heating system, thermostats are used to control forced air heating systems.

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Pipe: Thermally insulated pipe: Jacketed pipe Cooled or heated pipe Flexible connection: Hydraulic pump: Pump: Vacuum pump or compressor: Fan Axial fan Radial fan: Dryer: Jacketed mixing vessel (autoclave) Half pipe mixing vessel Pressurized horizontal vessel Pressurized vertical vessel Packed column: Plate column: Furnace: Cooling tower: Heat ...

  9. Jay Leno Addresses Rumors That His Recent Injuries Were from ...

    www.aol.com/jay-leno-addresses-rumors-recent...

    Jay Leno is setting the record straight about his recent string of injuries.. The former Tonight Show host, 74, appeared on the Dec. 22 episode of Bill Maher's Club Random podcast to discuss ...