The Retrofit That Made Things Worse
Induction units were already not winning any efficiency awards. Then came the BAS upgrades — and two mistakes that made a flawed system perform even worse. We found them in the field. This is what we saw.
Induction units were already not winning any efficiency awards. Then came the BAS upgrades — and two mistakes that made a flawed system perform even worse. We found them in the field. This is what we saw.
Your VAV box was set to push more air than the room ever needed. The thermostat kept up. Your energy bill kept climbing. Nobody questioned the math.
Comfortable room. Skyrocketing energy bill. The control system was working perfectly — and that was exactly the problem.
APS has developed many unique HVAC logic circuits: improving comfort and reducing energy consumption. The reductions caused the avoidance of over 60,000 person-years of GHG emissions with a three-person crew.