I have 40 years of experience, and specialize in the field of heating, ventilating and air conditioning (HVAC) and energy with specific knowledge in the areas of chilled water systems, heating, ventilating and air conditioning (HVAC) systems, and energy recovery. I have published on such topics as heating, ventilating and air conditioning (HVAC) controls, heating, ventilating and air conditioning (HVAC) operation, and solar energy systems. I have testified on heating, ventilating and air conditioning (HVAC) controls.