Flexible Duct, Sheet Metal Fittings, Access Doors And Accessories
REV 04/06
Where There’s Quality, There’s Flexmaster.
Flexmaster USA, located in Houston, TX, is a leading commercial HVAC flexible duct and sheet-metal fitting manufacturer with over 28 years of success in the industry. Our product line of Air Distribution Solutions includes: flexible ducts, acoustical ducts, sheet-metal fittings, access doors, low leakage access doors and accessories for heating, ventilation and air conditioning applications.
Designed for sheet metal workers and engineered to perfection, our flexible duct sets the standard in quality and dependability. Unique to others in the industry, we manu-facture flexible ductwork without the use of glues or adhesives. The mechanical-locked inner core maintains its shape at all 90° bends and offsets, thus eliminating the need for extra reinforcement. This manufacturing process produces a flexible duct with the high-est performance credentials of any flexible duct. Flexmaster USA's 20 year warranty is unsurpassed in the HVAC ductwork industry.
Our newest product additions focus on Medical and Environmental Solutions. These flexible duct and sheet metal fittings are manufactured with non-ferrous and anti-microbial materials and are ideal for Hospital Patient Rooms, Operating Rooms, MRI Rooms, Data Centers and Mission Critical Environments, where cleanliness, reliability and durability are required.
1
Flex
m
aster Solutions
www.fle
xmaste
rusa.com
Pressure Rated:
20” w.g. positive10” w.g. negative thru 12” Dia.5“ w.g. negative, 14” & 16” Dia.1”w.g. negative, 18” & 20” Dia.
Rated Velocity:
5500 F.P.M.
Type 3B Type 4BHigh Pressure
Insulated
Type 3M Type 4M
High Pressure Insulated
Pressure Rated:
16” w.g. positive5” w.g. negative thru 16” Dia.
1”w.g. negative, 18” & 20” Dia.
UL 181 Class 1
Universal Characteristics
Flame/Smoke: 25/50
Thermal Conductance:R-5.0, R-6.0, R-8.0
Operating TemperatureRange: -20 to +250°F
Rated Velocity:
5500 F.P.M.
Vapor Barrier Permeance:
3B - .01 Perm A.S.T.M. E96, Procedure A 3M - .05 Perm A.S.T.M.
E96, Procedure A
Vapor Barrier Permeance:
4B - .01 Perm A.S.T.M. E96, Procedure A 4M - .05 Perm A.S.T.M.
E96, Procedure A
METALHELIX
OVERLAPPINGFABRIC FOLDS
FILLER
Flexible Fabric Duct
Mechanical Lock Construction
2
Pressure Rated:
10” w.g. positive5” w.g. negative thru 16” Dia.
1”w.g. negative, 18” & 20” Dia.
Rated Velocity:
4000 F.P.M.
Pressure Rated:
6” w.g. positive4” w.g. negative thru 16” Dia.
1”w.g. negative, 18” & 20” Dia.
Rated Velocity:
4000 F.P.M.
Pressure Rated:
6” w.g. positive4” w.g. negative thru 16” Dia.
1”w.g. negative, 18” & 20” Dia.
Rated Velocity:
4000 F.P.M.
Type 5B Type 6B Type 8B
Type 8MType 6MType 5M
Low Pressure Insulated
Acoustical Insulated
Acoustical Insulated
Vapor Barrier Permeance:
5B - .01 Perm A.S.T.M. E96, Procedure A 5M - .05 Perm A.S.T.M.
E96, Procedure A
Vapor Barrier Permeance:
6B - .01 Perm A.S.T.M. E96, Procedure A 6M - .05 Perm A.S.T.M.
E96, Procedure A
Vapor Barrier Permeance:
8B - .01 Perm A.S.T.M. E96, Procedure A 8M - .05 Perm A.S.T.M.
E96, Procedure A
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3
Pressure Rated:
6” w.g. positive4” w.g. negative thru 16” Dia.
1”w.g. negative, 18” & 20” Dia.
Rated Velocity:
4000 F.P.M.
Pressure Rated:
20” w.g. positive10” w.g. negative thru 12” Dia.5”w.g. negative, 14” & 16” Dia.1” w.g. negative, 18” & 20” Dia.
Rated Velocity:
5500 F.P.M.
Pressure Rated:
16” w.g. positive5” w.g. negative thru 16” Dia.
1” w.g. negative, 18” & 20” Dia.
Rated Velocity:
5500 F.P.M.
Type NI-35 Type NI-45 Type NI-55Non-Insulated Non-Insulated Non-Insulated
Thermo Sleeve
Type TSMReinforced MetalizedOuter JacketType TSB
Fire RetardantPolyethylene Outer Jacket
Perm rating = .01 grains per square foot, per hour,
per inch of mercury
Perm rating = .05 grains per square foot, per hour, per inch of mercury
Available in 25’ Standard LengthsSizes to Cover Diameters from 4” thru 10”, 12”, 14”, 15”, 16”, 18”, 20”, 24”Thick Fiberglass Blanket - R-5.0, R-6.0, R-8.0
Flexible Fabric Duct
4
Pressure Rated:
6” w.g. positive5” w.g. negative thru 16” Dia.
Type NI-85Non-Insulated
Standard Duct
Rated Velocity:
4000 F.P.M.
Designed for sheet metal workers and engineered to perfection, our flexible duct sets the standard in quality and dependability. Unique to others in the industry, we manufacture flexible ductwork without the use of glues or adhesives. The mechanical-locked inner core maintains its shape at all 90° bends and offsets, thus eliminat-ing the need for extra reinforcement or hard 90° elbows. This manufacturing process produces a flexible duct with the highest performance credentials of any flexible duct in the industry.
Duct
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5
20warranty
year
Rated Velocity:
5500 F.P.M.
TL-M TL-B
Insulated Insulated
Pressure Rated:
10” w.g. positive thru 16“ Dia.6” w.g. positive, 18” & 20“ Dia.12” w.g. negative, thru 16” Dia.4” w.g. negative, 18” & 20” Dia.
Rated Velocity:
5500 F.P.M.
Vapor Barrier Permeance:
.05 Perm A.S.T.M.E96-66, Procedure A
Vapor Barrier Permeance:
.10 Perm A.S.T.M.E96-66, Procedure A
Pressure Rated:
10” w.g. positive thru 16“ Dia.6” w.g. positive, 18” & 20“ Dia.12”w.g. negative, thru 16” Dia.4” w.g. negative, 18” & 20” Dia.
Operating Temperature Range:
-20 to +250°F
Operating Temperature Range:
-20 to +250°F
Flame/Smoke: 25/50Flame/Smoke: 25/50
Flexmaster USA’s wide range of flexible duct offers you un-matched quality for any application. We’ll prove it! With our exclusive 20 year warranty, you can be confi-dent you’re using the best in the business. Unmatched by competitors, our warranty offers you peace of mind from the best flexible duct
manufacturer in the HVAC industry!
UL 181 Class 1
Thermal Resistance: R-5.0, R-6.0, R-8.0
UL 181 Class 1
Thermal Resistance: R-5.0, R-6.0, R-8.0
Flexible Metal Duct
6
Flexmaster Triple Lock product is an all metal flexible duct that is constructed entirely without the use of adhesives. The Triple Lock Mechanical joint makes an air tight seam, while the circum-ferential corrugations provide excellent strength and flexibility.
Minimum bend radius to center line is one diameter. However, our recommended radius is 1.5 diameters in accordance with accepted practice. Triple Lock stainless steel ducting may be easily cut to size and hand formed into elbows or offsets to suit job conditions without sub-sequent sagging or droop.
Triple Lock has much lower pres-sure loss than conventional cloth ducts due to the small but consistent corrugations that provide both strength and flex-ibility.
Rated Velocity:
5500 F.P.M.
NI-TL SS-NI-TL
Non-Insulated Non-Insulated
Pressure Rated:
10” w.g. positive thru 16“ Dia.6” w.g. positive, 18” & 20“ Dia.12”w.g. negative, thru 16” Dia.4” w.g. negative, 18” & 20” Dia.
Rated Velocity:
5500 F.P.M.
Operating Temperature Range:
-60 to +600°F
Pressure Rated:
10” w.g. positive thru 16“ Dia.6” w.g. positive, 18” & 20“ Dia.12”w.g. negative, thru 16” Dia.4” w.g. negative, 18” & 20” Dia.
Operating Temperature Range:
-60 to +1500°F
Flame/Smoke: 0/0Flame/Smoke: 0/0
Triple Lock Aluminum & Stainless Steel
UL 181 Class 0 UL 181 Class 0
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7
Flexmaster Fittings
CB, CBD, CBE, CBDEAvailable Order Size - 4” to 20”26 Gauge G-90 Galvanized Dimensions 1/8” Tolerance
FL, FLD, FLE, FLDEAvailable Order Size - 4” to 20”26 Gauge G-90 Galvanized Dimensions 1/8” Tolerance
Optional Features:Heavier Gauge Construction 24 ga., 22 ga., 20 ga.Aluminum, Stainless Steel or Paint Grip ConstructionBO1, BO2 & BO3 Damper options availableFlange, Flange with Gasket, Insulation Guard90 or 45° scoopAlso available for Ductboard
Spin Collar Fittings for Sheetmetal
Conical Bellmouth Fittings for Sheetmetal
Optional Features:Heavier Gauge Construction 24 ga., 22 ga., 20 ga.Aluminum, Stainless Steel or Paint Grip ConstructionBO1, BO2 & BO3 Damper options availableFlange, Flange with Gasket, Insulation Guard90 or 45° scoopAlso available for Ductboard
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Damper Options For All Fittings
2” Build Out 2” Build Out
Locking Quadrant
2” Build Out
3/8” Square Steel Shaft
Nylon Bushings
Locking Quadrant
FL & CB Options
Standard 26 gaugeAvailable in 24, 22 or 20 gauge
Available in stainless steel and aluminum construction
1” flange 26 ga. galvanized
1” insulation guard, 26 ga. galvanized
1” flange with gasket
FIG
SOG
Damper Blade
STD Spring EndDamper Connection
Shaft Extender& Cover
Damper Blade
STD Spring EndDamper Connection
Shaft Extender
Damper Blade U. Bolt 1 thru 10”, 2-12” up
2” build out
BO2BO1 BO3
Nylon Bushings
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9
Available Order Size - 5” to 16”26 Gauge G-90 Galvanized Dimensions 1/8” Tolerance
Features:1“ Flange with Corner ClipsPrepunched Mounting HolesAdhesive Coated Gasket for Minimal LeakageBO1, BO2 & BO3 Damper options available
Available Order Size - 5” to 20”26 Gauge G-90 Galvanized Dimensions - 4” W.G. Construction
1/8“ Tolerance
Features:1” Flange with Corner Clips
Prepunched Mounting HolesAdhesive Coated Gasket for Minimal Leakage
BO1, BO2 & BO3 Damper options available
STO, STOD
STOC, STOCD
45° STO, STOD
Available Order Size - 5” to 20”26 Gauge G-90 Galvanized Dimensions -4“ W.G. Construction1/8” Tolerance
Features:1“ Flange with Corner ClipsPrepunched Mounting HolesAdhesive Coated Gasket for Minimal LeakageBO1, BO2 & BO3 Damper options available
Side Takeoff Fittings
Flexmaster Fittings
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3/8” Rod Extends2” on Both Sides
3/8” Square Shaft
Brass Bushings
2” Build Out
3/8” Square Shaft
Brass Bushings
Locking Quadrant
LDS Fittings
Available Order Size - 4” to 20”26 Gauge G-90 Galvanized Dimensions 1/8 Tolerance
Optional Features:Heavier Gauge Construction - 24 ga., 22 ga., 20 ga.Aluminum, Stainless Steel or Paint Grip Construction
BO1, BO2 & BO3 Damper options availableNylon Damper Bearings
3/8” Square Damper Rod
Connecting SleevesSL, SLD
STO-LDS, STOD-LDSAvailable Order Size - 5” to 20”22 Gauge G-90 Galvanized Steel - Damper24 Gauge G-90 Galvanized Steel - Body1/8” Tolerance
Features:1“ Flange with Corner ClipsPrepunched Mounting HolesAdhesive Coated Gasket for Minimal LeakageOptional Damper Blade X or Y Axis
STOD-LDS Damper Options
Damper Blade U. Bolt 1 thru 10”, 2-12” up
2” build out
Brass Bushings
BO3
Damper Blade U. Bolt 1 thru 10”, 2-12” up
BrassBushings
BOX
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11
F2SO, F2SC, F4SC
Bellmouth Fittings
SBM, SBMD
Available Order Size - 5” to 20”24 Gauge G-90 Galvanized .125“ Neoprene Gasket on Flange1/8” TolerancePre-Drilled Holes on FlangeHigh Efficiency Takeoff Reduced Static Pressure (Savings 45% on Pressure) Air Tight InstallationLabor Saving Installation Energy SavingsLow Cost/Precision EngineeredHigh Velocity/Low Velocity Application (ideal for VAV Design)Gasket Washer to Prevent Leakage
Optional Features:BO1 & BO3 Dampers available
16”, 18”, & 20” Bellmouths are 18 Gauge Galvanized Steel Construction
Square to Round
Adaptors
Galvanized Steel
.0217
.0276
.0336
.0396
Stainless Steel
.0188
.0250
.0313
.0375
Gauge
26
24
22
20
26 Gauge G-90 Galvanized Dimensions1/8” ToleranceStandard Depth Size - 2”, 3“ or 4”Custom Sizes Available
Optional Features:Heavier Gauge Construction - 24 ga., 22 ga., 20 ga.Aluminum, Stainless Steel or Paint Grip ConstructionAvailable in Large (Nom. + 1/8”) or Small (Nom. -1/8”)Neck size equal to or less than smallest square dimension.Open or Closed Corners
Sheetmetal Gauge ChartThickness in Inches
Flexmaster Fittings
12
Available Order Size - 4” to 20”26 Gauge G-90 Galvanized Dimensions1/8” Tolerance
Optional Features:Heavier Gauge Construction - 24 ga., 22 ga., 20 ga.Aluminum, Stainless Steel or Paint Grip ConstructionFlange, Flange and Gasket, Insulation Guard90 or 45° Scoop Available
26 Gauge G-90 Galvanized Dimensions1/8” Tolerance1” wide mounting flange
Optional Features:Heavier Gauge Construction - 24 ga., 22 ga., 20 ga.Aluminum, Stainless Steel or Paint Grip ConstructionFlange, Flange and Gasket, Insulation Guard90 or 45° Scoop AvailableFL Spin for side inlet applicationsAvailable in Large (Nom. + 1/8”) or Small (Nom. -1/8”)
Round to Round Adaptors
Side Inlet Diffuser Box SIDB
4” to 6”5” to 6”6” to 8”7” to 8”8” to 10”9” to 10”
8” to 12”10” to 12”12” to 14”14” to 16”16” to 18”
Sample Order Sizes:
R2RC, R2RF
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Access Doors
High Pressure Access Door For Sheet MetalThe Inspector Series SDSM
Low Leakage • Quick Installation • Safe Entry and Exit
Flexmaster's - THE INSPECTOR SERIES - SPIN DOOR is manufactured with heavy gauge galvanized steel to meet the highest quality standards required in a high pressure access door. This insulated and gasketed
access door is designed for application in a low to high-pressure HVAC air distribution system. THE INSPECTOR SERIES - SPIN DOOR unique round con-
struction provides for a quick installation as its outer frame is spun into the sheet metal duct and then the self sealing inner door is put into place and
locked by turning the pre-installed latches. The outer SPIN DOOR frame is made of heavy gauge galvanized steel, rolled and double hemmed. The inner door is made of
heavy gauge galvanized steel, rolled and triple hemmed. When the outer SPIN DOOR frame is properly installed and sealed for the specified operating pressure the leakage rate is extremely low. No raw edges are exposed and therefore a safe entry and exit is insured.
OperatingPressure6” w.g.
10” w.g.
20” w.g.
Leakage Rate*All Door SizesLess than .10 CFM
Less than .25 CFM
Less than .50 CFM
*Sheet metal access door. Tested by an independent ADC certified laboratory.
Spin Flange
Outer FrameNotch
Continuous Gasket
Inner Door
Outer Frame
Heavy Galvanized Steel
Optional Features:ViewportCableFlange & Gasket
1” Insulation
Nominal Door Sizes: 8”, 10”, 12”, 18”, 24”
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The Inspector Series TBSM
TBSM-WPG
Nominal Door Sizes: 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20”, 24”
Optional Features:Hinge or PortRectangular1.5” & 2” Thickness
Heavy Galvanized Steel
Nominal Door Sizes: 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20”, 24”
.063 Aluminum/Glass Frame22 Gauge Galvanized Steel Frame3/16” AFP Neoprene Gasket on Frame
Optional Features:Hinge or PortRectangular
*All Doors Meet or Exceed SMACNA Recommendations
Tab Door
Wire Glass See -Through Tab Door
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15
Welded Grease Door
GDSM
Nominal Door Sizes: 9”x15”, 15”x15”, 21“x15”
Welded 16 Gauge Black Iron
THE INSPECTOR SERIES - TAB DOOR is manufactured with heavy gauge galvanized steel to meet the highest quality standards required in a low-pressure HVAC access door. THE INSPECTOR SERIES - TAB DOOR’S strong frame construction provides for a solid installation as its outer frame tabs are formed around the sheet metal duct and then the self sealing inner door is put into place and locked by turning the pre-installed custom latches. The outer TAB DOOR frame is 22 gauge, galvanized steel, formed, notched and hemmed. The double sided insu-lated inner door is constructed of 24 gauge galvanized steel.
Accessories Designed with the HVAC Contractor in Mind
Features:Factory assembled with collars on each end per UL 181Shipped assembled per custom orderPolyethylene or metallized mylar outer vapor barrierThermally insulated in R-5, R-6.0, or R-8.0Standard Sizes of 4” thru 20”Standard Lengths of 5’, 6’, or 7’Custom lengths and sheetmetal options availableReduce waste that can occur with 25’ boxes
Efficient & Cost Effective Installation of Low and Medium Pressure HVAC Systems
Flex Duct Kits
Affordable Time and Labor Saving Options
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UL181B-CMaterial: 6/6 NylonColor: Natural NylonTemp Range: -40°F to 185°FFlammability: U.L.94V-2 ATB: Less than 5 sec. per ASTM D635
Maximum Average STDDiameter Loop Tensile Pkg.
Part Number Formed Strength Lbs. (N) Qty.
UL181B 11.0 (297.4) 37.1 (942.8) .340 (8.610) .090 (2.300) 175 (778) 50
Dimensions - Inches (mm)
Length (L) Width (W) Thickness
Stainless Steel ClampQuick Release LS Series
Quick Release Spin Clamp
A-300 Heavy Duty Tension ToolFor use with Nonmetallic Clamps120 lb. to 175 lb. duct strapsManual Tension ControlNeatly Cuts Off StrapsMetal Construction
Material: Stainless SteelFlex Size: 4” to 20”
Easy On....Easy Off...in 3 Simple Steps!
Reverse procedure for quick release and removal.No need to disassemble connection
Slide clamp into position
Slide bandthroughhousing
Snap screw down for
engagement
Bridging over helix allows for better contact of clamp to duct thus lowering leakage
www.flexmasterusa.com
17
Material: Stainless SteelFlex Size: 4” to 20”
5,000
.01 .02 .03 .04 .05 .06 .07 .08.09.1 .2 .3 .4 .5 .6 .7 .8 .9 1
4,000
3,000
2,000
1,000900800700
600
300
400
500
200
1009080
60
70
16”
6”
7”
8”
9”
10”
12”
14”
5”
4”
5,000
.01 .02 .03 .04 .05 .06 .07 .08.09.1 .2 .3 .4 .5 .6 .7 .8 .9 1
4,000
3,000
2,000
1,000900800700
600
300
400
500
200
1009080
60
70
500 FPM
1000 FPM
16”
14”
12”
10”
9”
8”
4”
5”
6”
7”
Flexmaster Duct Material - Straight Run Friction Loss
Flexmaster Duct Material - 90° Bend Friction Loss
The data presented herein is based on reliable laboratory test. For all sizes the test bend was formed around a template of the same diameter as the duct resulting in a Radius to Diameter ratio of 1. The data has not been extrapolated for other bend ratios but must be considered when comparing values arrived at different R/D ratios.
By its very nature, flexible duct presents variations not present in the measurement of friction loss in rigid pipe. Variations exist between the test procedure and actual field installations and FLEXMASTER U.S.A., INC. assumes no responsibility for performance characteristics resulting from conditions which differ from those used in laboratory tests.
90 BEND - INCHES H20 PER FOOT - = 1RADIUSDIAMETER
Round Duct Area TableDuct Diameter
(inches)4”5”6”7”8”9”
10”12”14”16”18”20”
Cross Section Area(sq. ft.).0873.1363.1963.2672.3490.4418.5454.78541.0691.3961.7672.182
INCHES H20 PER FT
VO
LUM
E (C
FM)
INCHES H20 PER 100 FT
VO
LUM
E (C
FM)
18
Flexmaster Triple Lock Metal Flexible Ducting -Straight Run Friction Loss
WT/FTLBS
.15
.19
.22
.28
.31
.35
.38
.44
.56
.62
BendRadius
6”
7”
9”
10”
12
13”
15”
18”
21”
24”
DIA
4”
5”
6”
7”
8”
9”
10”
12”
14”
16”
5,000
.01 .02 .03 .04 .05 .06 .07 .08.09.1
4,000
3,000
2,000
1,000900800700
600
300
400
500
200
1009080
60
70
16”
6”
7”
8”
9”
10”
12”
14”
5”
4”
30
40
50
18”
20”
INCHES H20 PER 10 FT
VO
LUM
E (C
FM)
TRIPLE LOCK
8642
1
5
4
3
2
6
10
9
8
7
EQUIV. LENGTH - DIA’S.
BEN
D R
AD
. - D
IA’S
.Equivalent length of ducting for any bend radius
All Metal • Corrosion ResistantAir Tight• Permanent • High & Low Pressure
TP = Vp + SP
Vp =
V = Vm
cfm = A x V
TP = C x Vp
d(other than standard)0.075 (d = std. air)
V4005
2
TP = Total Pressure (in. w.g.)
Vp = Velocity Pressure (in. w.g.)
SP = Static Pressure (in. w.g.)
V = Velocity (fpm)
Vm = Measured Velocity (fpm)
d = Density (lb./cu ft)
A = Area of duct cross section (sq ft)
C = Duct Fitting Loss Coefficient
One Gallon Water = 8.33 poundsSpecific heat (Cp) water = 1.00 Btu/lb F (@68 F)Specific heat (Cp) water vapor = 0.45 Btu/lb F (@68 F)One ft. of water = 0.433 psi
One cu. ft. of water = 62.4 lb = 7.49 gal.One in. of mercury (Hg) = 13.6 in.w.g. = 1.13 ft. w.g.Atmospheric Pressure = 19.92 in.Hg = 14.696 psiOne psi = 2.31 ft. w.g. = 2.04 in.Hg
Hydronic Equivalents
19
Recommended NC-RC Levels for Different Indoor Activity Areas
TYPE OF AREA
Private home (urban)
Individual rooms
Private hospital rooms
Operating rooms
Laboratories
Board rooms
General offices
Concert, opera halls
Movie theaters
Lecture halls
Sanctuaries
Libraries
Schools & Classrooms
Restaurants
Retail Stores
Supermarkets
NC-RCLEVEL
25-35
30-40
25-35
30-40
30-40
20-30
30-45
15-25
30-35
30-35
20-30
30-40
30-40
35-45
35-45
40-50
APPROX.dBA
30-40
35-45
30-40
35-45
35-45
25-35
35-50
20-30
35-40
35-40
25-35
35-45
35-45
40-50
40-50
45-55
Flexmaster USA’s wide range of flexible duct offers you unmatched quality for any application. We’ll
prove it! With our exclusive 20 year warranty, you can be confident you’re using the best in the business. Unmatched by com-petitors, our warranty offers you peace of mind from the best flexible duct manufacturer in the HVAC industry!
20warranty
year
20
Proud Supporters of:
Houston Habitat for Humanity is a nonprofit, ecumenical Christian housing ministry. HHFH seeks to eliminate poverty housing and homeless-ness and to make decent shelter a matter of conscience and action.
Habitat invites people of all backgrounds, races and religions to build houses together in partner-ship with families in need.
The Race Across America is a 3,000 mile bicycling odyssey across the American continent to benefit M.D. Anderson Cancer Center. Since 1982, RAAM has come to symbolize the strength and endurance of America.
It has been called the "toughest endurance race in the world" by Outside magazine and it brings together the world's best endurance athletes.
All of Flexmaster USA products comply with UL 181 standards of the National Fire Protection Association NFPA No. 90A and NFPA No. 90B, also with the Follow-up Services Procedure and other applicable requirements of Underwriters Laboratories Inc. Only those products that properly bear the UL Mark are considered as listed by Underwriters Laboratories.
www.flexmasterusa.com
HOUSTON
HUMANITYHABITAT FOR
Standard Duct
Duct20warranty
year
Flexmaster USA’s wide range of flexible duct offers you unmatched quality for any application. We’ll prove it! With our exclusive 20 year warranty, you can be confi-dent you’re using the best in the business. Unmatched by competitors, our warranty offers you peace of mind from the best flexible duct
manufacturer in the HVAC industry!
METALHELIX
OVERLAPPINGFABRIC FOLDSFILLER
Build with the best.Designed for sheet metal workers and engineered to perfection, our flexible duct sets the standard in quality and dependability. Unique to others in the industry, we manufacture flexible ductwork without the use of glues or adhesives. The mechanical-locked inner core maintains its shape at all 90° bends and offsets, thus eliminating the need for extra reinforcement.
Flexmaster USA’s wide range of flexible duct offers you unmatched quality for any application. We provide the solutions for you to succeed and with our exclusive 20 year warranty, you can be confident you’re using the best in the business.
5235 Ted StreetHouston , Texas 77040713.462.7694 Phone
713-939-8441 Fax
www.flexmasterusa.com
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