Above Floor Installation Guide
Floor Plan/Layout Should . . . . . . . . . .
!Be drawn to scale using a CAD program so tube lengths can be calculated by the program.
!Show complete floor plan, including all appliances, cabinets, fireplaces and any other details which could affect the routing of the tubing.
!Show complete layout of all circuits.
!Provide length of each circuit, including leader length. Leaders are the tubing runs connecting from the room circuits to the manifold(s).
The heating system designer may add an allowance to the total length to account for variations in actual installation. This might range from 3 to 10% depending on the type of installation. In the example shown at left, the designer used a length allowance of 10 feet.
!Show tube spacing and flow directions.
!State finished flooring assumed for each space.
Note Tube Routing
!Run leaders (connecting tubing from manifolds to circuits) through hallways.
!Run leaders and tubing under doorways.
!Avoid running under walls to reduce chances of damage from fasteners.
!Mark the framing above where tubing runs under walls so all trades will be aware.
!If tubing must penetrate a firewall, follow local codes regarding sleeving and fire stopping requirements.
DO NOT Run Tubing:
!Under cabinets, refrigerators, ranges, freezers. These items "block" the heat and the tubing would be wasted.
!Within 8 inches of toilet flanges. The wax ring seal may soften and fail from the heat.
!Under fireplaces, ovens, appliances or other heat sources.
!Closer than 4" from walls.
!Closer than 6" from appliance vents or flues.
Part Number
B. Obtain Tube Layout Drawing
1.Do not start a radiant heating installation without a detailed tube layout drawing.
•It provides critical information on:
•tube routing
•tube lengths
•areas to be avoided
•materials needed
2.Figure 3 includes the information and drawing detail for a typical tube layout drawing.
3.A complete, accurate drawing of the tube layout is the most important key to a successful job.
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