Can Mysa for In-Floor Heating control a floor heater and wall heater together?

No. Mysa for In-Floor Heating should not be used to control an electric floor-heating system and a wall heater, baseboard heater, or similar room heater from the same thermostat.

Mysa for In-Floor Heating is designed and tested to directly control one compatible electric in-floor heating zone within the product voltage and load limits. Even if the combined wattage appears to be under the thermostat maximum, mixing a floor-heating load with a separate wall or baseboard heater is not a supported installation.

Why this setup is not recommended

• The thermostat was designed for compatible electric in-floor heating systems, not mixed heater types on one control.

• The built-in GFCI protection is intended for the in-floor heating circuit. Adding another heater type may cause nuisance GFCI trips or unsupported behavior.

• Floor heating and wall/baseboard heating can respond differently, which may lead to poor comfort or inefficient control.

What to recommend instead

• Use one Mysa for In-Floor Heating thermostat for each compatible electric in-floor heating zone.

• Use the correct Mysa for Baseboards model for compatible electric wall heaters, baseboards, convectors, or fan-forced heaters.

• If a customer has a custom wiring plan, large load, relay, contactor, or mixed heater setup, they should have a qualified electrician review the full design before installation.

If you are not sure which Mysa product fits your system, contact Mysa Support with photos of the existing thermostat wiring and details about the heater type, voltage, and wattage.