Commercial Radiant Heating and Cooling
Quick-reference Guide
The information in this document assumes typical
construction methods used in commercial radiant
heating and cooling installations.
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D. Estimating Tubing Required
T = Area x 12/o.c. Spacing
OR T = Area x Multiplier
Spacing
Multiplier
Spacing
Multiplier
6"
2.00
9"
1.33
1. Determine parameters (A), (B).
7"
1.71
12"
1.00
2. For each area, calculate total tubing (D).
8"
1.50
18"
0.67
Quick-quote Procedure
3. Based on tubing required, estimate the number of loops (E).
Make sure to account for leader lengths.
4. Based on number of loops, determine number of manifolds (F).
Make sure to check flow rates.
E. Determining # of Loops
Tubing
Max. Length
⁄8"
125-150
⁄2"
250-300
⁄8"
350-450
⁄4"
450 -500
3
5. Determine coils to minimize waste (I).
1
6. Size manifold cabinets (J).
5
7. Include accessories in quote.
3
30
Ceiling Capacity (BTUH/SF)
18
Maximum Surface Temperature
84
Average Water Temperature
95-110
Typical Design Delta T
10-20
Typical Room Setpoint
68
Typical Tubing Diameter
⁄2 - 3⁄4
9" - 12"
B. Typical Design Parameters — Cooling
Floor Capacity (BTUH/SF)
12
Ceiling Capacity (BTUH/SF)
30
Minimum Surface Temperature
66
Average Water Temperature
5-8
Typical Room Setpoint
78
Typical Tubing Diameter
⁄2 - 3⁄4
1
Typical On-center Spacing
Max.
GPM
Engineered
Polymer (EP)
12
15.4
TruFLOW™ Jr.
12
14
TruFLOW Classic
12
21
Spacing:
9" o.c.
6" o.c.
Width
4.5' or 9'
5' or 10'
Max. Length
165' for 1⁄2", 225' for 5⁄8"
Diameter
1
Tubing
Wirsbo hePEX™ or Uponor AquaPEX®
Header
3
⁄2" or 5⁄8"
⁄4" Reverse Return or None
H. Uponor PEX-a
Properties
55-58
Typical Design Delta T
Max.
Loops
Manifold
G. Radiant Rollout™ Mat Options
1
Typical On-center Spacing
Size manifold based on
# of loops and flow
GPM = Q / (500 X Delta T)
Notes:
1. Maximum loop lengths determined by
pressure drop. Goal PD < 10ft.
2. Pressure drops can vary greatly based
on operating temperature, flow rate,
and glycol percentage.
3. Be sure to include leader tubing
A. Typical Design Parameters — Heating
Floor Capacity (BTUH/SF)
F. Sizing Manifolds
# of loops = T / loop length
I. Wirsbo hePEX™ Coils
C. E
stimating Capacity
Q (BTU/H) = H x Delta T x Surface Area
100', 400', 1000'
⁄2"
100', 300', 500', 1000'
⁄8"
100', 300', 400', 1000'
3
⁄4"
100', 300', 500', 1000'
1"
100', 300', 500'
200°F
180°F
73.4°F
1
80 PSI
100 PSI
160 PSI
5
6" - 9"
Notes:
1. Capacities shown assume bare concrete floor. Adjustments required for flooring.
2. Floor-cooling capacity does not include direct solar absorption, which could
increase capacity to 31 BTUH/SF.
⁄8"
3
Custom coils available
J. Sizing Manifold Cabinets
Loops
TF CL/Jr.
TF w/BV
EP
EP w/BV
2-4
24
24
24
24
H=
Floor
Wall
Ceiling
5
24
24
24
30.5
Cool
1.23
1.40
1.94
6
24
30.5
24
30.5
Heat
1.94
1.40
1.06
7
24
30.5
30.5
30.5
8
30.5
30.5
30.5
39
Notes:
1. Delta T = ABS (Space Temperature - Controlled Surface Temperature)
2. Assumes that space temperature is close to or equal to operative temperature
3. Surface area = active area
4. Does not include direct solar absorption
9
n/a
n/a
30.5
39
10
30.5
39
30.5
39
11-12
39
39
39
39
For further guidance, please contact your local Uponor representative or Uponor Design Services at 888.594.7726
or [email protected].
Slab Slab
on on
Grade
Radiant
Grade without Insulation
Suspended Grade
Radiant Slab on Suspended Deck Detail
Uponor Fixing Wire (TYP)
#A7031000 or Plastic Zip Ties
Uponor Fixing Wire (typical)
#A7031000 or Plastic Zip Ties
6"
6"
1-1/2" minimum
between top of
tubing and top
of slab
1-1/2" minimum
between top of
tubing and top
of slab
5/8" Uponor
Wirsbo hePEX Tubing
5/8" Uponor
Wirsbo hePEX Tubing
Rebar
Rebar
Wire Mesh
Screen secured to Rebar
Wire Mesh
Screen secured to Rebar
Structural Slab
Structural Slab
Suspended Metal Deck
Vapor Barrier
Note:
1. Design and installation of the structural slab shall be per structural engineer’s specifications.
2. Coordinate exact placement of tubing within structural slab in field with respect to rebar,
electrical conduit, piping, post-tension tendons, etc.
3. Structural slab on suspended metal deck detail with 5/8" tubing at 6" centers secured
to wire screen with underside insulation. Adjust insulation as needed based on flooring R-value.
Compacted Grade
Note:
1. Design and installation of the structural slab shall be per structural engineer’s specifications.
2. Coordinate exact placement of tubing within structural slab in field, with respect to rebar,
electrical conduit, piping, post-tension tendons, etc.
Topping
Slabwith
with
3.Radiant
Structural slab
on grade detail
5/8"Fixing
tubing at Wire
6" centers secured to wire screen
without insulation.
Topping Slab (Fixing Wire)
Topping Slab (Staples)
Detail#: SLAB-005
Minimum 2" Concrete Topping Slab
Uponor Fixing Wire (typical)
#A7031000 or Plastic Zip Ties
Detail#: SLAB-006
Radiant Topping Slab with Plastic Staples
Uponor Plastic Foam
Staples (typical) #A7015075
6"
3/4" minimum
between top of
tubing and top
of slab
Minimum 2" Concrete Topping Slab
6"
1-1/2" minimum
between top of
tubing and top
of slab
5/8" Uponor
Wirsbo hePEX Tubing
5/8" Uponor
Wirsbo hePEX Tubing
2" Extruded Polystyrene
Foam Board Insulation
Wire Mesh Screen
(Non-structural)
2" Extruded Polystyrene
Foam Board Insulation
Structural Slab
Structural Slab
Local Secondary Injection
Note:
1. Design and installation of the structural slab shall be per structural engineer’s specifications.
2. Radiant topping slab detail with 5/8" tubing at 6" centers secured to a non-structural wire mesh
Hot Water
using fixing wire on top of 2" rigid insulation.
Hot Water Return
Cold Water Return
Cold Water Supply
Globe Valve/
Circuit Setter
Heating/Cooling Switchover
A
2-way Valve with
Network Relay
Water Supply
Hot Water Return
Detail#: SLAB-001
Globe Valve/
Circuit Setter
Chilled Water
Note:
1. Design and installation of the structural slab shall be per structural engineer’s specifications.
2. Radiant topping slab detail with 5/8" tubing at 6" centers secured on 2" rigid insulationHot
with
plastic foam staples. If insulation is changed to 1", use A7015050 Plastic Foam Staples.
Supply
A
RHC_RefGuide_H466_1012, Copyright © 2012 Uponor. Printed in the United States
Polyerethane spray foam
insulation applied to the
underside of the metal
deck. Apply to a uniform
thickness needed to provide
minimum R-10.
Cold Water Return
Cold Water Supply
A
Diverting Valve
A Opt. HX/Pump
to prevent
CW
and
Globe Valve/
HW mixCircuit
(ie. Treatment
Setter
Diverting Valve
Pressure Differences)
Low Loss Header/Decoupler
Hot Water
Detail#: SLAB-002
A
Globe Valve/
Circuit Setter
3-way Modulating Valve
Circuit Setter
Radiant System Pump
Uponor, Inc.
5925 148th Street West
Apple Valley, MN 55124 USA
Tel: 800.321.4739
Fax: 952.891.2008
Uponor Ltd.
2000 Argentia Rd., Plaza 1, Ste. 200
Mississauga, ON L5N 1W1 CANADA
Tel: 888.994.7726
Fax: 800.638.9517
www.uponorengineering.com
A Opt. HX
to preven
HW mix (i
Pressure D