Installation guide

17
2” (50.8 mm)
Return Manifold
Supply Manifold
Under Floor Layout Example
Heating PEX or
Heating PEX-AL-PEX
Heat Transfer Plate
Foil Faced Insulation
Insulation Requirements
• It is important to have a tight seal between the horizontal insulation
and the joist itself. The tighter the joist cavity, the better the system
will perform.
• Foil insulation will ensure most of the heat and energy coming from
the tubing is reflected upward towards the subfloor where it is evenly
distributed..
• A 2-4" (50.8 -101.6 mm) air gap is necessary between the tubing and
insulation. This air gap helps increase the effective R-value of the in-
sulation while optimizing the ability of the foil to reflect energy.
• An R-value of at least 4 times higher than the floor is desire. For most
interior conditions, an R-13, or a 3-1/2" (88.9 mm) batt should be used.
When installing over an unheated area, exposed area or crawlspace, a
minimum R-19 or 6" (152.4 mm) batt should be used.