1. Unico Installation Rules

2. Steps to a Unico Layout
1. Do a total load calculation for the building
2. Do a room by room load calculation
3. Determine where the air handler/return will go
4. Run the plenum as long as you can to connect the tubing
5. “Connect the Dots”

3. Laying out a System Room by Room Load Calculations: Manual J
Wrightsoft
Quick Sizer
Different load calculations, it is stressed to do a good load calculation on every job

4. Laying Out a Unico System
Calculate Room Load
Rough Rule of Thumb: 2000 btu’s of cooling per outlet
Always put more not less outlets in the space

5. Decibel Levels Approx dB(A) 2" Sound Level CFM Outlets/ton
Approx dB(A)
2"
Sound Level
CFM
Outlets/ton
Recommended application
ultra low 25 20 10
Multimedia Rooms, high altitude
very low 27 28 8
Rooms with hard surfaces (wood or concrete floors and walls)
low ** 29 33 7
Rooms with carpet, drapes, furniture
normal 32 40 6
Large rooms or where sound is not critical (minimum number of outlets)
excessive 35 45 5
Industrial environments

6. Unico System Uses Static Regain
An Example of Static Regain

7. Not Equal Friction
This is what most think of for Warm Air Systems

8. Plenum Sizing Diameter Max CFM Typical Model 7” 700 1218 or 2430 9”
1000
3642
10*
1300
4860
*Required for M4860

9. Plenum Length – Rule of Thumb
Plenum can be up to 150’ equivalent length
First Tee = 30’
All other tees = 15’
Elbows = 15’
Total plenum in the sizes provided can be up to 150’. If the first fitting is a Tee it is equal to 30’. All fittings after that are equal to 15’. Be sure to use 4’ straight duct between fittings – minimum is 2 ‘. 9

10. 24 Inch Rule
You must be a minimum of 24 inches from the exit of the blower before any fitting or take off. 10

12. 60/40 Rule Split 50/50, no more than 60/40 Applies to all tees
If you have a tee in the system split the flow as close to 50/50 as possible, no more than 60% of the air flow on either side of the tee. This rule is true for every tee in the system although it is most important for the first tee. Any tees after that can be as much as 80/20 without problems.
Q: Assuming that we are using 20 Fully Rate Outlets. What is the max on each side of the tee and of those tees? A: 12

13. 70/30 RULE No more than 30% of CFM on side branch
Turn a tee 90 degrees and you have a side branch (do not use the turning vane). The side branch can have no more than 30% of the total CFM. 13

14. Space Takeoffs evenly
Maintain spacing between takeoffs as evenly as possible. Minimum 6 inches between takeoffs and 12 inches from end cap. 14

15. 11/17/2018
Unico System

16. For Every 5 feet Over 10 You Lose 10% of Capacity
25 ft. run is 70% of an outlet
24.5 CFM of air

18. Unico Commissioning Sheet
Bulletin30-100( ).pdf
Unico Commissioning Sheet