» build to a higher standard


Ampex – Insulated Panel for Radiant Heating

Ampex® is an under-concrete insulated pex panel for hydronic radiant heating.

The combination of moulding expanded polystyrene (EPS) insulation, one of the highest performing energy efficient insulation materials available today, with High Impact Polystyrene (HIPS) film, makes for a strong and resilient PEX panel. The panel combines rigid insulation, a vapor barrier and PEX tubing locking mechanism into a single product that significantly reduces installation time.

radiant Pex Panel 006

The innovative patented panel design ensures that the tubing is completely encased in concrete and not pushed to the bottom of the panel through the use of bridge connectors. The larger contact area between the tubing and the concrete allows for increased heat transfer reducing the response time of the system and helping achieve desired temperatures faster.

The large, four-sided tongue and grove interlock system makes for quick, easy and secure installation while maintaining continuity of the vapor barrier eliminating the need for a dedicated 6 mil. Polyethylene (unless specifically required by local building code).

The 2’x4’ panels are placed on compacted stone/gravel. Ampex panels employ unique “mushroom” shaped nubs which lock PEX tubing firmly in place (staples and zip ties not needed). PEX tubing is easily inserted into the panels simply by walking in the tube. Concrete is poured on top of the panel to the required thickness (as per local code) encasing the tubing, nubs and any steel reinforcement (optional – rebar or welded wire mesh).

Product Range:

Ampex® insulated panel is available in both residential (28 psi) and commercial (45 psi) styles. The residential panel is made using Type II EPS (1.5 lb/ft3 density) with R-values of R10, R12, R14 and R16. The commercial panel is manufactured using Type IX EPS (2.0 lb/ft3 density) with R-values of R11, R13, R14 and R16. The unique patented design of the nubs will accept PEX tube sizes of 1/2”, 3/8”, 5/8”, 3/4” and one of the very few insulated radiant PEX panels on the market to accept 1” PEX tubing (commonly used in commercial applications).

The Ampex panel is designed to save time and labor cost with the installation and perform more energy efficiently once installed.

Benefits of the Ampex Panel:

  • Quick and easy walk-in installation of the PEX tubing
  • No staples or zip ties required and eliminates working at 45 degree angles
  • Nub height allows for tubing of multiple diameters
  • Consistent grid pattern allows for uniform heat transfer
  • Height of the nubs protects the tubing when the panel is walked upon
  • Easy, manageable panel size reduces the waste at site

Ampex Radiant Heating Applications:

  • Heating system for basements and other living areas viz. kitchen, bathroom etc.
  • Snow and ice melt applications for driveways & walkways
  • Heated floors for outdoor patios.
  • Automobile establishments including garages, car washes and dealerships
  • Agricultural applications viz. farms and barns
  • Workshops and factories

Ampex concrete volume calculator:

  • Volume of concrete between nubs: 0042 yd3/sf (0.0032 m3/sf)
  • 1” layer of concrete above the top of the panel: 0031 yd3/sf (0.0024 m3/sf)
  • 3” concrete slab (including volume between nubs): 0135 yd3/sf (0.0103 m3/sf)              
  • 4” concrete slab (including volume between nubs): 0166 yd3/sf (0.0127 m3/sf)

Amvic Insulated Panel for Radiant Heating Installation Instructions PDF

 Physical properties of Amvic Insulated Panel for Radiant Heating meet the requirements of ASTM C578.12b

Standard Description AMPEX
ASTM D 1622 Density lb / ft3 N/A     1.5 lbs. / ft³ 2.2 lbs. / ft³
ASTM C518-10 Thermal Resistance R-value N/A     10°F.ft².h / Btu 11°F.ft².h / Btu
ASTM D1621-10 Comp-
ressive Strength
N/A     28.0 psi 45.5 psi
ASTM C203-05a (2012) Flexural Strength N/A     51.9 psi 68.6 psi
ASTM E 96 / E96M-12 Standard Test Method for Water Vapor barrier N/A     23.8 ( ng / Pa.s.m² ) 0.42 Perms 17.5 ( ng / Pa.s.m² ) 0.31 Perms
Product Description
overall board size (l x w) Inches 49.25″ x 26″     49.25″ x 25.25″ 49.25″ x 25.25″
  cm 125.10 x 66.04     125.10 x 64.14 125.10 x 64.14
Usable size (l x w) Inches 48″ x 24″     48″ x 24″ 48″ x 24″
  cm 122 x 61     122 x 61 122 x 61
Overall thickness including grid Inches 1.0″     3 3/8″ 3 3/8″
  cm 2.54     8.57 8.57
Nominal EPS insulation thickness Inches N/A     2.0″ 2.0″
  cm N/A     5.08 5.08
EPS Type USA N/A     Type II Type IX
  CANADA N/A     Type 2 Type 3
Pex pipe accomo-
inches 3/8″, 1/2″, 5/8″, 3/4″     3/8″, 1/2″, 5/8″, 3/4″ 1″ 3/8″, 1/2″, 5/8″, 3/4″ 1″
  cm .95, 1.27, 1.58, 1.91     .95, 1.27, 1.58, 1.91, 2.54 .95, 1.27, 1.58, 1.91, 2.54
Parts per bundle   50     18 or 20* 18 or 20*
Sq. ft. Per Bundle   400     144 or 160* 144 or 160*
Bundles per Truckload   192     92 92
Units per truckload   9600     1656 or 1840* 1656 or 1840*

*Please Contact your Customer service representative.

NOTE: Actual Units per trick load may vary depending on trailer configuration.

CSI Amvic Insulated Panel for Radiant Heating (US specifications)…(click here)
CSI Amvic Insulated Panel for Radiant Heating (CANADA specifications)…(click here)
Amvic Insulated Panel for Radiant Heating Techinical Brochure

Download Ampex Insulated Pex Panel Specification Chart