The Lennox 19Y99 is a heavy-duty

Direct OEM Alternative: Engineered as a drop-in replacement for the 6614 fin comb set

Operating on a standard 24V AC circuit with a 1/2-inch NPT connection

stocking this regulator repair kit is essential for preventative maintenance and immediate field repairs

Plug-and-Play Compatibility: Pre-terminated lead simplifies field replacement and reduces labor time

Braeburn Systems 5970 Tstat Guard 322838-752 The Lennox 19Y99 is aThe Braeburn 5970 Universal Thermostat Guard with keyed lock is a professional grade solution for securing HVAC controls in high traffic environments like offices, hospitals, and schools. Designed for maximum versatility, this clear thermostat lock box features a tamper resistant design that prevents unauthorized setpoint adjustments while allowing technicians to monitor the display. It accommodates thermostats up to 7. 3" W x 5. 25" H x 1. 8" D,