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2. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   After the control of air flow and temperature was standardized, the use of electromechanical relays in ladder logic to switch dampers became standardized. Eventually, the relays became electronic switches, as transistors eventually could handle greater current loads. By 1985, pneumatic controls could no longer compete with this new technology ...

3. What should you set your heat to in the winter? Avoid ... - AOL

   www.aol.com/finance/set-heat-winter-avoid...

   Turn the heat down when you're away But setting your thermostat to a specific temperature and never changing it won't be good for your heating bills . Though about 70 degrees is ideal, it's unwise ...

4. Home repair - Wikipedia

   en.wikipedia.org/wiki/Home_repair

   Left unattended, a small leak can lead to significant structural damage, necessitating the replacement of beams and framing. With a useful selection of tools, typical materials and supplies on hand, and some home repair information or experience, a home-owner or handyperson should be able to carry out a large number of DIY home repairs and ...

5. Damper (flow) - Wikipedia

   en.wikipedia.org/wiki/Damper_(flow)

   This damper can switch the electrical power to control additional "slave" dampers, minimizing the electrical load on the damper's control circuitry and power transformer A zone damper (also known as a Volume Control Damper or VCD ) is a specific type of damper used to control the flow of air in an HVAC heating or cooling system.

6. New ‘visit a heat pump’ scheme aims to help ... - AOL

   www.aol.com/visit-heat-pump-scheme-aims...

   A new “visit a heat pump” scheme allows people to see the clean heating tech in a home near them to help families make the switch from boilers.

7. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   Opened float switch of a dirty-water pump. Switches can be designed to respond to any type of mechanical stimulus: for example, vibration (the trembler switch), tilt, air pressure, fluid level (a float switch), the turning of a key , linear or rotary movement (a limit switch or microswitch), or presence of a magnetic field (the reed switch ...