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The Thermostat 518 accurately controls the room temperature for a hydronic heating zone using Pulse Width Modulation (PWM) technology. Simple up and down buttons and a display with large type make this thermostat easy to read and use. The 518 automatically detects a single auxiliary sensor to measure either outdoor, floor or remote room temperature. This easy to install thermostat is a direct replacement for tekmar Thermostats 507 and 508. An optional Adaptor Plate 012 is available which allows the thermostat to be installed onto a single gang electrical box.

Any item purchased on Homeperfect.com can be returned up to 30 days of receipt of the product. Customer will be responsible for return shipping fees. All products must be returned in 'AS NEW' condition - which requires the product to be in its original packaging and in 100% resalable condition (unless product is deemed defective). Please call (973) 482-4444 to receive a Return Goods Authorization (RGA) number. Only items returned with a pre-authorized RGA number will be credited.

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