Additional dual-voltage relay 120V/240V (INTEGRATION-RELAY-DUAL)

A GFCI/GFEP (Ground Fault Circuit Interrupter / Ground Fault Equipment Protection) works differently than a circuit breaker by specifically detecting a small imbalance in electrical current between the hot and neutral wires, which indicates a potential ground fault (like a person touching a live wire), and instantly shutting off the power to prevent shock, while a circuit breaker only trips when there's a significant overload in current flow on the circuit, like a short circuit or too many appliances plugged in.

Relays can fail due to excessive current or voltage. When a relay is exposed to too much current, the contacts can burn out. High voltage can also damage the coil. Other reasons include mechanical wear and tear, dust or dirt buildup, and moisture. These factors can cause the relay to malfunction or stop working entirely. Regular maintenance and using the relay within its specified limits can help prevent failures.

Most low voltage HVAC thermostats are OK to use with tile floors. If you are heating wood, vinyl, carpet, or any other flooring products that have a "maximum temperature" limit, then low voltage HVAC thermostats are not recommended UNLESS they have an input for a floor sensor. Check with the low voltage HVAC thermostat manufacturer about floor sensor inputs first, before buying a third-party integration kit for these types of flooring products.

Yes, but the tear-out is the real risk. Scan the floor with thermal imaging before demo to map the existing hydronic tubing, and never fasten or drill into it. Keep the two systems on fully independent controls so they cannot fight each other, and do not place the electric floor sensor directly above a hydronic loop — the false-high reading will short-cycle the electric system. Call PRO technical support at 800-875-5285 to review the assembly before ordering.

If multiple Integration Kits are needed, we suggest using 240V Integration Kits and 240V heating elements. See our support area for the appropriate diagram. 

WarmlyYours suggests contacting the manufacturer of the home automation system to determine compatibility or how it recommends operating an electric floor heating system.

If the smart thermostat cannot process a floor sensor reading, it is not compatible and the integration kit will not resolve this.

22 Amps.

5 mA GFCI breakers, sized by a local electrician in compliance with local electrical codes.

That depends on which thermostat you buy, how big a space that will be heated, and the voltage available and voltage of the heating elements.