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Heating/Ventilation/Air Conditioning

  1. Keep vents closed in unoccupied areas to prevent heating or cooling of storage areas and closets.
  2. Reduce fresh air intake to the minimum necessary for the type of business.
  3. Treat water in evaporative condensers regularly.
  4. Replace resistance electric heating systems with heat pumps.
  5. Create a plan to replace old HVAC systems with new energy-efficient systems. Don't wait until they breakdown.
  6. Install paddle fans, stratotherm fans, or other re-circulating systems to create air movement. Ceiling temperatures can often be 30 to 40 degrees higher than floor temperatures, and air movement from fans can enhance the cooling ability of air conditioning systems.
  7. Install air conditioner economizers to use outside air to cool buildings when outdoor air is cooler than indoor temperatures.
  8. Install time clocks, set-back thermostats, and microprocessor thermostats to monitor and control HVAC systems when buildings are unoccupied.
  9. Review programmable thermostat and EMS programs to verify operating times.


  1. Check air filters monthly and clean or change as needed.
  2. Check air intake screens monthly and clean as required.
  3. Inspect air dampers monthly and keep them as airtight as possible.
  4. Check V-belts (fan belts) monthly for frays, cracks, and nicks, and replace as necessary.
  5. Check heat recovery devices monthly for proper operation.
  6. Brush off air conditioner condenser coils monthly.


  1. Check motors, bearings, and blower fans every 3 months, and lubricate as required.
  2. Check heating and cooling coils every 3 months and clean as needed.
  3. Check vacuum blower compartments every 3 months.
  4. Check ducts, vents, and pipes every 3 months, and repair any damaged insulation.


  1. Check cooling systems in the spring before the cooling season begins.
  2. Check pulleys and sheaves in the spring and fall for alignment and proper belt tension.
  3. Set thermostats at 78° or higher for cooling during the summer.
  4. During the summer open windows and use only the fan portion of cooling systems when outdoor air is cooler than indoor temperatures. Keep doors and windows closed when air conditioning systems are operating.
  5. Check heating systems in the fall before the heating season begins.
  6. During the winter open shades and blinds on sunny days to warm buildings naturally, and close them at night to prevent heat loss.
  7. Set thermostats at 68° or lower for heating in the winter and 55° when buildings are unoccupied. If heating is required in warehouses, set thermostats to 50°.


  1. Check cabinets and brackets once a year and tighten all bolts and screws as necessary.
  2. Check housings yearly, remove rust and re-paint as required.


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