Modular Radiant Technologies uses a blend of recycled materials to manufacture a “green” modular radiant heat panel that can be used on floors or walls. The lightweight thermal mass panels have high Btu output and thermal storage capacity. The panels also are sound-deadening, fire-resistant, and easy to install and service. The recycled-material panels can contribute to points for LEED certifications, GreenxGlobes ratings, Energy Star ratings, GreenGuard Building Construction Certification, and are acceptable in National Register of Historic Places renovations.