Gypsum Series

Ray Magic® CL

Ray Magic® CL (Classic) is a high-performance hydronic radiant gypsum panel. It comes finished with CertainTeed 12” gypsum board with AirRenew® and it installs on the ceiling, to create an unobstructed radiant surface.

Ray Magic® CL is 4’x8′ in size and it can be cut down into two 4’x4′ panels to fit smaller spaces.


The panel consists of a 112″ thick EPS board with laid-down aluminum heat transfer plates with propriety omega-shaped channels. Pressed into these channels are two symmetrical 8 mm PEX radiant tubing circuits laid out in a serpentine pattern. Each tubing circuit is connected in parallel to 16 mm PEX return and supply lines that run along the length of the panel. Panels are connected together using slide-in patented fitting technology that allows for internal PEX piping expansion and contraction.

Ray Magic CL

Technical specifications

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Ray Magic CL 4′x8′
Part number
RGCL4812 (substitute discontinued model RM1051)
Quick and easy to install with panel slide-in patented fitting technology
High heating and cooling performance
90% net radiant surface
Tubing footprint and screw template laser engraved (ink free)
Works with 16mm or 1/2" PEX header lines
Panel pre-cut opening window to access fittings in case of necessity

Size and weight

Ray Magic CL

Nominal size

W4′ [1219 mm]
L8′ [2438 mm]
H2" [51 mm]


Wet weight (with H2O): 70 lbs [32 kg]
Dry weight: 66 lbs [30 kg]

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Color and finishing
CertainTeed high density 1 12" gypsum board with AirRenew® technology
Ray Magic CL

Tubing footprint and
screw template laser
engraved (ink free)

12" gypsum board

16 mm PEX backbone pipe

Aluminum transfer plate

8 mm PEX radiant pipe

RM coupling (2)
and RM cap (2)

RM 3-way fitting with triple o-ring
US patent #10113678

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Panel connection
Up to 8 panels per loop (use expansion joint after 4 panels connected in series)
Panel to panel:
use (2) RM couplings (included in each panel)
Panel capping:
use (2) RM caps (included in each panel)
Panel to headers:
use Messana 16 mm pre-insulated PEX pipe. Tested also with 1/2" PEX pipe
Heat exchanger
Aluminum plates omega-shaped to wrap around the pipe to increase thermal exchange surface
0.016 inch [0.4mm], 27 gauge
Thermal conductivity:
0.21 W/mK (1/2″ gypsum board)
Radiant pipe:
8 mm [≈ 516"] PEX 3-layer pipe with EVOH oxygen barrier
Serpentine pattern:
3 38" o.c. [100 mm], 3" max cut-out allowed
Serpentine lenght:
48 ft per circuit, two circuits per panels (total 96 ft of piping)
Radiant Area
Gross radiant area:
32 sq.ft. (total panel surface)
Net radiant area:
28.8 sq.ft. (total active surface)
Net radiant percentage:
Fluid operating temperature
46 °F to 130 °F
Cooling capacity
23.2 Btu/h/sq.ft @55 °F (Max 36.2 Btu/h/sq.ft @46 °F) with 76 °F room temperature
Heat output
28.0 Btu/h/sq.ft @100 °F (Max 59.2 Btu/h/sq.ft @130 °F) with 70 °F room temperature
Nominal flow rate
0.22 GPM
Pressure drop
1.4 ft of head [0.6 psi] @0.22 gpm / 50 °F
Operating pressure
20 to 40 psi (air pressure test at 100 psi)
Water content
0.46 gal [1.75 lt], equivalent to approximately 4 lb [1.8 Kg] of water
1 12" EPS board ASTM E84 (Class A rated)
Size, weights and technical characteristics may vary without prior notice

Thermal performance1

Cooling capacity
Ray Magic CL cooling graph
Heating capacity
Ray Magic CL heating graph
These thermal performance charts are based on a correlation between internal testing performed using thermal imaging of the panel surface and the test results, according to the nominatives EN 14240 (cooling) and EN 14037 (heating), performed on the previous version of the Ray Magic® panel.

Ray Magic®, comfort from above...

The way nature intended.

What is Radiant Cooling?

Radiant cooling is an energy-efficient cooling technology that, unlike traditional forced-air systems that cool the air, employs chilled radiant surfaces like ceilings or floors to directly absorb the heat radiated by objects and people within a space. Radiant cooling creates a comfortable, even distribution of coolness, without the need for visible and noisy equipment.

What is a Radiant Ceiling?

A radiant ceiling is a type of heating and cooling hydronic terminal that uses the large unobstructed surface area of the ceiling to transfer thermal energy to or from the objects in a room through thermal radiation. Radiant ceilings can be used as a standalone terminal or in conjunction with other heating and cooling systems to provide an energy-efficient and effective indoor climate solution.