Watkins Mill
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© 2015 AJS Consulting Engineers, P.C.

Cooling and heating is provided by a VRF system, or Variable Refrigerant Flow system.


Each room is provided with a ceiling mounted  fan coil unit controlled by a wall thermostat. These are capable of cooling or heating. Interior rooms like this one require cooling all year round.


This model of VRF system can simultaneously cool some rooms while heating other rooms.  Using the excess heat recovered from the cooled rooms to provide some of the heating required in other rooms.


This outdoor section provides the force for these three modes of operations:

1. Cooling

2. Heating

3. Heat Recovery


DOAS system, or Dedicated Outside Air System  ensures fresh air to each room with minimal energy use.


Watkins Mill High School Wellness Center - Gaithersburg, MD