DITEK's DTK-HVACKIT surge protection kit includes one DTK-120/240CM+ for HVAC condenser protection, and one DTK-4LVLPLV to protect thermostat control wires at air the handler. Power outages, surges and voltage transients can damage your heating and cooling system just like any other valuable electronic device. DITEK’s HVAC Surge Protection Kit is perfect for commercial and residential HVAC installers who want to provide an additional, valuable service to their customers. DITEK’s top quality, superior performing products help prevent equipment loss during these damaging events