1. Constant Volume Product Line
This slide deck has been written to ensure you are familiar with the full line of Young Regulator Constant Volume Products.
Constant Volume Product Line

2. Your Constant Volume Supermarket
Young Regulator has the largest range of constant volume products.

3. What do they do? Any place you need a calibrated maximum airflow.
Limit Flow to a preset volume regardless of static pressure. (over their effective range)
They all feature some sort of moveable feature that reacts to the changing pressure/velocity to adjust the free area thereby keeping volume constant.
These products all work in the same way. They have a very specific free area both in size and shape.
As the air moves though the unit it forms a restriction. As the air speeds up, trying to move past the restriction,
Any place you need a calibrated maximum airflow.

4. Applications Supply Exhaust Outside Air Delivery
Correct Over-Supply Issues due to ductwork limitations
Simplify air balance
Bath/Kitchen Exhaust
Correct for Stack Effect
Force Return from stubborn areas
Building Types
Theses products are being used for more and more applications. Any where that we want to limit airflow to a specific maximum. They work well alone or in conjunction with other technologies like VAV or Zoning. They are used in both directions supply and exhaust/return. All sorts of buildings.
Tall Buildings
Hospitals
Schools
Office Buildings
Hotels/Motels
Condominiums

5. CVR - Constant Volume Regulator
Precision molded body UL-94V-0 rated material
UL-2043
Soft pliable edge seal
Free area engineered both in size and shape
Aero-Gate floats up as airflow increases
Limits total flow over pressure range (0.2 to 0.8 InWC)
Low- Pressure and High-Pressure units available
No Power/ No Sensors – Just clever shapes
The Constant Volume Regulator is an ingenious duct insert. It has been designed to limit airflow through the duct. As the air flowing starts moving faster it causes the Aero-Gate rise to block more of the free area. Simple in concept, highly engineered in design. Now you have an pressure independent tool to deliver the “right” amount of air. These units have been in use in Europe for many years. They are being added to more and more job specs. It is easy to see why. They are relatively inexpensive and provide a tool to build comfort and realize energy savings at the same time.

6. Size and Flows
CVRs come in several flow ranges per diameter Choose a Diameter and Range ex. 6MH ( cfm)
Static Pressure Range
InWC
Accuracy
Set pt ±10%
Set pt ±15% below 50CFM
The CVR can be adjusted to provide a max flow within a specific range. There are multiple ranges for each diameter. Choosing the part you need is easy. Select the size then move down the table to the part that meets your flow needs. This table is on all of the CVR submittal sheets. If you need high or low pressure units there are similar tables.
Unit
Description
Submittal
CVR-xx
Std. unit InWC
YR – CVR –xx
CVR-HP-xx
High Pressure InWC
YR – CVR-HP-xx
CVR-LP-xx
Low Pressure InWC
YR – CVR-LP-xx

7. Performance Data
Read pressure across the bottom axis then up to trace that reflects your settings
InWC we would expect the CVR to pass approximately 149 CFM
Remember the units are indexed in M3/hr
Conversions
Volume M3/hr / 1.7 = CFM
Pressure 250 pa= 1 InWC

8. Multi configurations CVR-XX CVRF1
CVREX
Regulator by itself
Regulator in a 1” deep duct insert
Regulator in a Register Box
Regulator in a box deep enough to accommodate a Fire/Radiation Damper
Regulator in a low-profile side-tap enclosure. Optional: Fire/Radiation Damper
Regulator set in Intake/Exhaust hood
CVRs are available in several standard sheet metal enclosures. They feature heavy duty 24 gauge galvanized steel. They can be customized to your requirements.
All fittings are made from heavy 24-gauge steel
Fittings designed to be as low-profile as possible
Custom fittings are our specialty
One stop Air Distribution shopping

9. CVP – Constant Volume Regulator Plus
Precision molded body UL-94V-0 rated material
UL-2043
Soft pliable edge seal
Tool-free Flow Adjustment
Limits total flow over pressure range (0.2 to 2.0 InWC)
4” and 5” 25 to 130 CFM
6” to 275 CFM
Anti-Microbial Plastic
No Power/ No Sensors
Made in USA
The CVP works in much the same way as the CVR. It depends on the initial setting of the damper blade rather that restricted free area to cover it’s range so one unit covers the entire range. Tool-free Adjustment means you push the white triangle to the CFM you want to pass. Install in the duct or fitting. DONE. It covers a wider range than the CVR all the way to 2.0 InWC. The CVP is molded and assembled in the USA

10. CVP Performance Curves
25 to 130 CFM
50 to 275 CFM
The 4” and 5” units use the same body so they perform the same. Notice how consistent the performance curves are, nice and flat! The inset on the page shows the areas beyond the part’s normal curve.

11. Multi configurations CVP-XX
CVPF2
CVPF5
CVPF8
CVPFD
Regulator by itself
Regulator in a Register Box
Regulator in a box deep enough to accommodate a Fire/Radiation Damper
Regulator in a low-profile side-tap enclosure. Optional: Fire/Radiation Damper
Regulator and Fire Damper in a UL Rated Assembly.
The CVP also comes in a variety of sheet metal fittings. And for the first time we are offering a UL Rated fire damper assembly on our straight through box (F5).
All fittings are made from heavy 24-gauge steel
Fittings designed to be as low-profile as possible
Custom fittings are our specialty
One stop Air Distribution shopping

12. UL Rated Fire Assembly!
Young Regulator can now offer a UL Rated Assembly:
Constant Volume Regulator
Enclosure
Dynamic Fire Damper
Grille
Complies with:
UL 2043 Heat and Visible Smoke
UL 555C Dynamic Fire Damper
UL – R38089
UL – 8218
UL Rated assemblies available in standard sizes. Fire/radiation dampers also available in other fittings.
CVPFD

13. Constant Volume Dampers Round
Constant Volume Dampers work in a similar way to CV regulators. When air moves though the part itmoves the asymmetrical blade. As air speeds up the blade closes more free area. Thusly holding flow very constant.
Dampers are rated for much higher flows and pressures. (up to 4InWC) The dampers are made of heavy galvanized steel. It features soft lip seals to fit tight into round duct or flex duct.

14. Constant Volume Dampers Adjustment
Insert a 2 mm allen key through the small hole in the top of the adjustment device.
CW Increases the flow
CCW Decrease flow
The device is calibrated in M3/hour (CFM soon)
M3/hr divided by 1.7= CFM
Damper adjustment is straight forward. Using an allen key turn the center weight in the adjustment device to the desired airflow reading. Multi-level rectangular units will have individual adjustment devices for each level.
Label will soon be calibrated on both meters and CFM.

15. Constant Volume Dampers Round
Choose your Size and Flow Rate
Min value is approximate and driven by Pressure drop.
Round CVDs come in High or Low units. Find the diameter and flow rate you need.

16. Constant Volume Dampers Rectangular
Rectangular Constant Volume Dampers work just like their round cousins. They come in a variety of sizes up to 24x24 and will carry up to 5900 cfm. They are designed to work with flanged ductwork.

17. Size and Flow Rates Heights above 12” are double deckers
Find sizes the duct you are connecting to. Then choose the flow you want.
The addition of a motor will allow the flow rate to change between two flow set points. All of the sizes noted in dark blue can be fitted with a motor.
teen give you 2 Maximum Flows
Heights above 12” are double deckers

18. Static Pressure (inWC)
Savings Potential
Case Study Limiting Exhaust to 62.1 requirements
Consider a 10-story condo block with a
central exhaust chase and a rooftop ventilator (in Boston, MA).
With an open 6” exhaust 0.1inwc, it will cost roughly $226 annually to condition the air required to replace the exhaust.
If, because of proximity to the fan, stack effect, and wind loads, the pressure at the top of the chase is 0.4inwc instead, then
Cost= $488. A CVR will save $262 annually!
Flow Rates and Costs - 6” Exhaust Vent
Static Pressure (inWC)
Uncontrolled Flow (CFM)
Annual Cost to Condition1 “New Air”
Annual Cost to Condition1
w/105 CFM CVR
Savings
0.8
330
$702
$226
$476
0.6
280
$604
$378
0.4
225
$488
$262
0.2
155
$338
$112
0.1
105 --
1 Cost figures from Paul Raymer, “Cost of Ventilation” Ventilation News and Views Aug 2013 ( Boston: HDD(55) =3299, Gas= $1.28/therm electricity=$0.18 kWh)
This study compares the cost of “reconditioning” exhaust air if more than optimum volume is pulled from the building.

19. More Considerations IAQ Indoor Air Quality Variable Speed Motors
The CVR controls exhaust across all of the spaces.
Ensure that air changes happen!
If the motor changes speeds, pressure will change and therefore flow from the space will change
Not if you have CVRs installed!
Uncontrolled, upper floors closer to the exhaust blower will see much more flow into the chase. Stack effect can make that even worse. Constant volume devices will allow one to pull appropriate amounts from each space.
No one wants to live with yesterday’s onions.
Variable speed motors provide a lot of flexibility. But if the ventilation system cannot adjust to higher or lower airflow we could be pushing exhaust from one floor into other units.

20. Your Airflow Multi-Tool
Limit Airflow into or out of rooms
Independent of pressure*
Ventilation
Make-up Air
Intake Control
Variable Speed Motors
* Over part’s effective range

21. Think Young!