Get in Touch with Koven Air Company
Wet-Bulb Derating & COP Estimator
Koven Air KAFZ evaporative chiller — see how site wet-bulb, not dry-bulb, sets your capacity.
Use the ASHRAE design wet-bulb for your site, not the record dry-bulb.
KAFZ20320 rated 1088 kW at 26 °C WB.
1088
Corrected capacity (kW)
5.89
Estimated COP at this wet-bulb
Within the standard band. Capacity and COP track the rating closely.



![Commercial Rooftop Unit Guide: Types, Sizing & Costs [2026]](https://kovenair.com/wp-content/uploads/2026/07/commercial-rooftop-unit-guide-featured-2-150x150.png)
