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Can I use the Commbox or Resibox with single phase electric?


The BOX system can be used with single-phase electric power. Click “Read More” for details.

Can I use an uncoupling membrane with the NADWS cable ?


Warmup now offers our own DCM-PRO cable, which is a custom designed cable compatible with all uncoupling membranes.

Can I swap my 3iE to a 4iE or Tempo?


Yes. The box and mounting requirements are identical for all horizontal Warmup thermostats and the sensor is compatible. If you’d like to swap a 3iE for a 4iE or Tempo thermostat you will need to consult with a qualified electrician, as it requires handling line voltage wires when disconnecting and reconnecting.

Can I install my Warmup system directly on top of plywood?


This page outlines installation recommendations when installing over a plywood sub-floor.

Can I install a 120V mat on one leg of a double pole breaker?


There is no neutral leg on a double pole breaker and the polarity between the two sides does not match. This will cause the thermostat to trip and/or it will send too much voltage into a 120V heater.

Can I Have Another Thermostat as an Acting Relay?


When you have multiple floor heating systems being powered that require more than 15amps, you can use an additional 3iE as a relay as opposed to purchasing a separate generic relay which Warmup can supply.

Can I connect one Warmup heater to another in series?


Connecting one system to the other in series is often referred to as “daisy chaining”. Each floor heating system must be connected individually to the operating floor heating thermostat.

Can I connect more than one Warmup heater to a thermostat?


As long as all systems that connect to the thermostat do not exceed 15 amps, running multiple leads up the conduit to the thermostat location is completely acceptable.

Can a wooden floating floor be installed directly over the Warmup NADWS system?


This page discusses installation methods required for installing a Warmup heating system under a floating wood floor.

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