This Thin Foil panel has been installed both with and without aluminum. This panel in this test shows both, with Aluminum on the left. Within 20 minutes, Warmboard has achieved a panel temperature of 70º F. The Thin Foil with Aluminum takes 1 hour while the uncoated panel does not reach that temperature within 2 hours.

The striping (the temperature variation across the surface of a panel) only varies by 2º F on Warmboard. Thin Foil with aluminum (Al) is almost double and the side without AI is triple. Warmboard is also generating 16 BTUs/HR/SF (British Thermal Units per hour per square foot), which means Warmboard generates more heat from the energy provided to your home.

Tubing on the Warmboard panel is 12” apart. The thin foil panel has tubing every 7” increments. This means more tubing and manifolds are added to the cost as well as longer installation time.

Both panels were in an environment with a 65º F air temperature. They both also had the same water temperature, 120º F. The insulation over each panel had a R-Value of 2.22.

Note: Temperatures were taken from just above the center of each panel. Striping differences were also gathered from this area. Temperatures from on top of the tube were compared to temperatures at the midpoint between the tubing pattern.

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