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OPERATING THE FAN
Heating Season
Cooling Season
17
Within an enclosed building space, with minimal air movement, hot lighter air rises to the ceiling while cold heavier air falls
to the floor creating a temperature gradient. This condition will cause excess energy use as the HVAC system fights to
maintain the thermostat set point typically at 5 ft above floor level. This inefficient condition can also cause great thermal
discomfort for the building occupants.
The Air Pear is an energy efficient air turbine, designed to continuously move a column of air to the floor. A typical Air Pear
installation includes a series of units mounted just below the ceiling, evenly spaced throughout a facility, working in concert
to balance the air temperature ceiling to floor and wall to wall.
As air circulation improves and air temperatures balance, your HVAC system will require less and less energy to comfortably
heat the work area, reducing the energy consumption of HVAC systems up to 35% or more. Once started, the entire
process of “thermal equalization” will take, on average, less than 24 hours.
All Air Pear fans are designed to run continuously, year-round, to maintain thermal equalization and general air movement.
We tend to think stratification occurs only in the heating season, but actually the condition exists year round. As you
mechanically condition the air to combat rising outdoor temperatures, combined with minimal air movement, a large
temperature gradient can exist.
The HVAC system will consume more energy as it fights the temperature gradient, hot and cold spots and short cycling
compared to a properly mixed space. Using the Air Pear system will help alleviate the problem through thermal equalization.
Keeping the thermostats satisfied longer and creating air movement that produces a cooling effect on the skin will result in
the ability to raise the thermostat set points as much as 6° F, yielding up to an 18% energy savings during cooling seasons.
In non-air conditioned spaces, the Air Pear system can be used for spot cooling and general air circulation. If a large
temperature differential exists between day and night a strategy of drawing cool night air into the space and closing
openings during the day can help maintain a cooler temperature internally as outdoor air temperatures rise.
A person’s head is most sensitive to comfort perception. Hot air trapped in the ceiling warms all the surrounding duct work,
decking and other ceiling mounted equipment to act as a radiant heat source and can cause the occupants to perceive
discomfort. Reducing this radiant heat source through thermal equalization will help alleviate this condition.
All Air Pear fans are designed to run continuously, year-round, to maintain thermal equalization and general air movement.
The fan speed can be maintained the same throughout the year or increased for the summer months to enhance the
evaporative cooling effect if people in the space find this to be desirable.
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