Avoiding clicking sounds with baseboard heaters

Baseboard heaters sometimes make clicking sounds. These are caused by the unit’s metal reacting to temperature variations: it expands when the heat turns on and contracts when the temperature cools.
In Global Commander baseboard heaters, the element is set on high-temperature nylon supports to eliminate thermal expansion noises.
Another good trick: do not overtighten screws fastening the heater to the wall. After your heater is securely in place, loosen screws half a turn. This will leave room for the metal to expand without making noise.
Likewise, you should leave a space of at least 1/8" (3 mm), between molding and baseboard heater sides.
Using an electronic thermostat will also reduce noise by maintaining a consistent room temperature, which minimizes expansion and contraction.