Timber kilns follow strict temperature and humidity schedules to avoid warping, checking, and case-hardening. The exhaust carries both recoverable heat and valuable moisture-control potential that is often wasted.
Enthalpy wheels recover both heat and humidity; returning some moisture to the incoming air can actually ease the drying schedule during the early, stress-prone phase of the kiln cycle.
Kiln atmospheres can be acidic from wood extracts and are persistently wet, so specify corrosion-resistant cores, food-free stainless where needed, and robust condensate management. Periodic cleaning prevents buildup that blocks airflow.
Program the exchanger bypass to follow the kiln schedule and monitor RH closely. Results are 25-50% energy savings with tighter moisture uniformity and fewer rejected boards.