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The SUPCO sh250 is a universal drain heater designed to prevent condensate drain line freeze-up in HVAC systems operating in cold-weather conditions. Drain heaters wrap around or insert into condensate drain lines to maintain above-freezing temperatures, keeping drainage flowing and preventing ice blockages that can cause system shutdowns or water damage. This component is a standard installation in equipment exposed to low ambient temperatures, including heat pump systems, mini-splits, and rooftop units. Licensed HVAC technicians typically supply and install drain heaters as part of cold-weather commissioning or service calls.
The sh250 is suited for residential and light commercial HVAC applications where condensate lines run through unconditioned spaces such as attics, crawl spaces, or exterior walls. It is a universal-fit design, making it adaptable across a wide range of drain line configurations without requiring system-specific components. It is commonly installed during initial equipment setup in northern climates or as a retrofit when freeze-related drainage failures are identified.
Designed as a universal-fit drain heater for residential and light commercial HVAC condensate drain line applications.
Installation should be performed by a qualified HVAC technician. Disconnect power to the HVAC system before beginning any service work on associated components. Secure the drain heater along the condensate line per the manufacturer's instructions, ensuring adequate coverage of the freeze-prone section. Follow all applicable local codes and HVAC equipment manufacturer guidelines for accessory installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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