A. Long straight runs and trunk-lines

• "EZfit" duct = 15 man hours per 100'.
  Flanged duct = 20 man hours per 100'.
  

B. Machine Connections

• Machine with 1 or 2 ports = 3 man hours per port.
  Machines with 3 or more ports = 4 man hours per port.
  

A + B = TOTAL MAN HOURS

OR QUICK METHOD
(TOTAL # OF PORTS) X 3 HOURS EACH = X
X x 2 = DUCTING SYSTEM TOTAL MAN HOURS

NOTE: The above methods should be used for comparison and budgetary purposes only! By no means should they be used to confirm a job installation. It should be the salesperson's responsibility to analyze each individual job and make his/her own judgment.

1. Order one clamp per "EZfit" component.

• 1 - duct -- 1 clamp
  2 - elbows -- 2 clamps
  

2. Specify dimensional information to speed-up process:

• Transitions A,B,D,L,X, Y and flange style
  Branches A x B x C
  In-cuts A,B
  Reducer All diameters
  
• THERE IS NO SUCH THING AS TOO MUCH INFORMATION !
  

3. Look for 60 degree elbows to compliment branch orders. This is typical application since the two components will create a perpendicular run to the trunk line.
4. Ask for flange styles, hole patterns, ID, OD, when applicable. Typical components requiring flanges will be parts that connect to filters, fans or other types of equipment.

STEP 1

• Temporarily place the in-cut on the main trunk in the required position, and while holding in place, place hand inside of branch and mark the interior of the branch on trunk line where it is to be cut out.

STEP 2

• Take down in-cut and drill a starter hole in the main trunk along the line traced from the branch. Then using metal snips or a reciprocating saw, cutout metal piece that has been traced out. File or grind any sharp edges to insure efficient flow.

STEP 3

• Now use a industrial strength silicone sealant to seal between in-cut base and main trunk.

STEP 4

• Use small sheet metal screws or a banding type clamp material to secure incut to the main trunk line.

1. Wash down all components with an industrial de-greaser insuring that no oils or residues are left behind.
2. Apply an epoxy primer in a light coating.
3. For final coat, apply an acrylic water base paint.
(Example: Glidden® - Lifemaster®)

1. GALVANIZED Ducting will accommodate systems 0 degrees to 500 degrees F with little or no breakdown of the zinc coating. Zinc melting point is 740 degrees f.

2. 304 SS Ducting will accommodate systems 500 degrees F to 1100 degrees F with no problems. At temperatures above 800 degrees, a small amount of "bluing" may occur.

There are a few concerns and requirements when dealing with these applications:

CLAMPS

Always quote clamps with the Gortex® seal alternative: (ie: 260.xx- GT). When installing, use the extra tab of seal, on exterior of clamp, to tuck underneath clamp edge before clamping. In some trouble cases additional silicone sealant may be required in the groove of the clamp. Apply this before installing clamp. **Refer to diagram # "EZfit" AL-01**

DUCT

Install duct longitudinal seam in the 12:00 position. Additional silicone sealant may be required in the exterior seam of duct.

ELBOWS

• Some problem areas may require a drain point to be installed in the field.
• Never use "EZfit" on a positive or "BLOW THROUGH" system without caulking all exterior seams. There are definite possibilities for leakage.
• Factory caulking addition will be as follows:
  • Exterior longitudinal duct seam
  • Exterior gored elbow seams
  • Nordfab can not guarantee a leak free system.
  • Factory caulking used, will be our standard 3M #2084 metal sealant. This is our standard used on our branch system. Service Temp -0 deg. to 250 deg.F.