High Humidity and Mortuary Coolers: Managing Condensate in Southern Climates

A mortuary cooler in Knoxville and the same cooler in Baton Rouge don't live the same life. High indoor humidity means more moisture condensing on the evaporator coil every hour the unit runs — and in the South, run times are longer too.

The overflow risk

Indoor P2 and P3 packaged systems handle condensate with an internal re-evaporation pan: hot refrigerant gas evaporates coil condensate during normal operation. But in high-humidity environments or extended run times, that pan can overflow. The manufacturer's answer is built in: a 3/4″ NPT external drain connection to be routed to a remote drain via a field-supplied condensate pump or external drain line.

Planning the install

• Facilities in Florida, Texas, Louisiana, Georgia, coastal Carolinas, and similar climates should assume the external drain is needed and rough it in before delivery.
• Maintain the P-trap liquid seal — add water to the drain line at startup.
• Any drain run through freezing conditions must be sloped and heat-traced.
• Conditioning the prep room itself (dehumidification, door discipline) reduces coil load and door-cycle cold loss on upright coolers.

Responsibility and warranty

Drainage and site readiness sit with the purchaser and installer. Water damage from improper drainage isn't a product defect and isn't a warranty claim — which is exactly why we publish the requirement up front on every product page and on the Packaged Refrigeration Manuals & Startup Guide. See also our regional sizing guide.