How to install radiant heat floors

John Martin from WarmZone is on hand to show Bob how the medium density fiberboard (MDF) faced with reflective aluminum shielding and precut channels for the Pex hot-water tubing comes together to create a layout for the in-floor radiant heat system. One key advantage to radiant heat is the comfort level, since it is steady heat that is evenly distributed and free from the blowing, particulate matter that can come with forced-air systems. Martin explains how the WarmZone system comes ready-to-install with complete layout diagrams and directions that make it simple for do-it-yourselfers. The panels are set in adhesive, with spacers to temporarily align them and line up the tube channels until the panels are nailed in place. The heat panels then become the substrate for finish floor coverings. Unlike gypcrete, which is a skim-coat concrete application, these panels add very little weight to the floor. Since it is a 5/8-inch product, there is also no need to alter existing door openings. WarmZone specifies a 3/8-inch Pex tubing to deliver the heated water. Martin fits and taps the tubes in place in the channels to complete the installation. Bob then looks at the heat distribution system with supply and return pipes that come directly from the boiler room below. WarmZone has specified three short runs and circuits, which will give steady even heat throughout the space even with the heat loss calculations they have figured. Michael Willburn from WarmZone shows Bob the preassembled boiler-room manifold board and radiant-zone board that are created match the application and arrive ready-to-install from WarmZone. WarmZone takes the information directly from the homeowner, creates the system to fit the job, and then ships it to the site. The homeowner or installer can do all the work without the aid of a plumber until the system is connected to the boiler, at which point a professional installer should verify the connections and operation of the system before firing it up. I