Snow Melting5) Calculating the Circuit Information

Fasteners*Snow MeltArea (ft²)

MultiplierEstimatedAmount

6" Spacing 1.1

9" Spacing .75

12" Spacing .55

Tubing(1/2" 5/8" 3/4")

Snow MeltArea (ft²)

MultiplierEstimatedAmount

6" Spacing 2.2

9" Spacing 1.5

12" Spacing 1.1

Divide total tubing by max. circuit length (round up)

Snow Melting 6) Water/ Glycol Design

• Selecting the percentage of glycol

Freezing Point (°F)

Glycol MixtureEthylene

GlycolPropylene

Glycol

30% 3.7 8.4

40% -12.6 -6.7

50% -35.0 -30.0

Snow Melting 7) Flow Rates (gpm)

gpm = Btus

T x 500

short form

for snow melting

T @ 30 F°

Btus

15,000

Calculate flow for each snow melting area Divide by number of circuits in area to get gpm per circuit Use flow per circuit to find pressure drop

Snow Melting 8) Pressure Drop

2.0

0.055

2 gpm through 5/8" PEX = 0.055 feet of head loss per

foot of tubing

Circuit length = 250’

Pressure drop = length x loss per foot

250 x 0.055 =

13.75 ft. head

Snow Melting9) Pressure Drop and Flow Rate Adjustments

• Use the table to adjust the pressure drop

and flow rates according to % Glycol mixture

Glycol Effects on the System

% Glycol MixtureFlow Rate

% Increase MultiplierPressure Drop

% Increase Multiplier

30% 5% (1.05) 20% (1.20)

40% 8.5% (1.085) 25% (1.25)

50% 12.5% (1.125) 31% (1.31)

Snow Melting10) Pump Sizing

• Add gpm of all areas together• Take highest head loss in tubing• Add any additional head loss (other piping, valves, etc.)• Choose pump from manufacturer curves

Snow Melting Cross Sections

Slab on grade with insulation

Snow Melting Cross Sections

Pavers over sand or stone dust bed with insulation

Snow Melting Cross Sections

Asphalt over sand or stone dust bed with insulation

Snow Melting Cross Sections

Slab over structural slab

Snow Melting Construction

• Utilize expansion joints as with a radiant slab (100 foot perimeters, 25’ x 25’ max)

• Use bend supports and sleeves to protect tubing at all penetration points and expansion joints

• Insulate under snow melt area

• Insulate sides of slab (very high heat loss)

Snow Melting Tubing Layout: standard

Snow Melting Tubing Layout: stairs

Snow Melting Selecting the Control Package

• Basic Digital Snow Melting Control II package– Economical system required– Snow sensor cannot be mounted in the thermal mass

Snow Melting Basic Control Piping

Snow Melting Selecting the Control Package

• Advanced snow melting control package

– Slab protection

– Boiler protection

– Manual override

– WWSD (Warm Weather Shut Down)

– CWCO (Cold Weather Cut Out)

– Test sequence

– Pump exercising

Snow Melting Advanced Control Piping Option 1

Snow Melting Advanced Control Piping Option 2

Snow Melting Advanced Control Piping Option 3

Climate Mat Header

Climate Mat Header after finish pour

• Assembled header

• Pressurized

• 20’ leaders

Climate Mat being rolled out.

Kyle Busch Racing – Garage - Radiant

KYLE BUSCH GARAGE – HILLS SERVICE CO. Project location – Mooresville, North Carolina

Contractor – Hills Service Company

Viega employees assisted in the installation of the Viega Climate Mat Radiant system for this 60,000 square foot race shop.

The Viega Climate Mat was selected due to the functionality and ease of installation in comparison to other radiant systems in the market.

This project will achieve a greater “GREEN” number or “LEAD POINTS” due to the use of Geothermal and having it tied into the Viega Radiant System.

Kyle Busch Racing – Garage - Radiant

Main garage area prior to install. Jay & Kevin work diligently to find the Climate Mates to place in the garage and wash bay areas.

Garry is busy hammering down the Climate Mate.

Main garage after Climate Mate install. Example of the proper spacing and install of Climate Mat.

Example of one of the connected manifolds for the Kyle Busch garage.