Tekmar 519 is 518+079 combo (thermostat + floor sensor, in a factory package). 518 (519) thermost a simple, yet time-proven and reliable 1-stage (single zone) digital non-programmable thermostat with simple button interface and large backlit screen. Designed and intended for use with indoor hot water radiant floor heating systems utilizing PEX tubing. Compatible with all zone valve controls (Taco ZVC, Tekmar 300V, etc.) and switching relays (Tekmar 300P, Taco SR, Grundfos UPZCP, etc.).
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