Should I use a 120V or 240V electric floor heating system?
When it comes to selecting the appropriate heating cable for your Warmup system, understanding the differences between 120Vac and 240Vac options is essential. While both types of cables output the same amount of power per square foot, the main distinction lies in the amount of cable you can attach to a single 15A thermostat.
If you prefer to watch a clip on the differences of the 120V vs. 240V, view the video below:
120V or 240V Underfloor Heating Cables?
Both 120Vac and 240Vac Warmup heating cable(s) output the same amount of power (wattage) per square foot (13.1 watts), so, the only difference between 120Vac and 240Vac heating cable(s) is the amount (ft2) of heating cable you can attach to one 15A thermostat.
Increasing the voltage will decrease the amperage of a heating system. Simply put, selecting 240Vac heating cable allows you to put more square feet of heating cable(s) versus 120Vac. You can see this clearly on the chart below for our DCM-PRO heating cable:
The rule of thumb is that areas equal to or less than 137 SF at 13.1W/SF, a 120Vac heating cable can be used. Areas over 137 sqft, 240Vac can be used. If your areas are larger than 249 SF, additional controls will be needed. Contact Warmup to assist in your design.
It is also important to note that the 120Vac heating cable will use a single pole breaker v 240Vac that will use a double pole breaker. This can come into play if you are limited to the space in your electrical panel.
In conclusion, selecting the appropriate heating cable for your Warmup system requires understanding the differences between 120Vac and 240Vac options. While both options deliver the same power per square foot, the distinction lies in the amount of cable that can be connected to a single 15A thermostat.
If you have any questions or need help, feel free to contact our customer support team at 888-927-6333. We’re here to guide and support you in choosing the right Warmup heating system for optimal performance and comfort.