PRECISION AIR CARE
Dynacraft Bypass VAV
PRECISION AIR CARE
Dynacraft Bypass VAV
PRECISION AIR CARE
Dynacraft Bypass VAV
Pressure Dependent VAVs
Pressure Dependent VAVs
Introduction
Introduction
A Pressure-Dependent Bypass Variable Air Volume (VAV) Box is an HVAC component used to regulate airflow to different zones in a building while maintaining comfort and energy efficiency.
Unlike pressure-independent VAV boxes, these units do not have a direct flow measurement device. Instead, they modulate airflow based on duct pressure changes and bypass excess air back to the return plenum or duct.
Features
Features
Bypass Mechanism: Excess air is redirected instead of being throttled down, reducing static pressure in the duct system.
Pressure-Dependent Control: Adjusts airflow based on variations in duct pressure without an independent flow sensor.
Mechanical or Electronic Controls: Can be controlled through mechanical dampers or electronic actuators for automation.
Cost-Effective: Typically lower initial cost compared to pressure-independent VAV boxes.
Common in Small-Scale Applications: Used in systems with minimal pressure fluctuation concerns, such as small office spaces or residential applications
Bypass Mechanism: Excess air is redirected instead of being throttled down, reducing static pressure in the duct system.
Pressure-Dependent Control: Adjusts airflow based on variations in duct pressure without an independent flow sensor.
Mechanical or Electronic Controls: Can be controlled through mechanical dampers or electronic actuators for automation.
Cost-Effective: Typically lower initial cost compared to pressure-independent VAV boxes.
Common in Small-Scale Applications: Used in systems with minimal pressure fluctuation concerns, such as small office spaces or residential applications
Pros
Pros
✅ Lower Cost: More affordable than pressure-independent systems due to simpler design.
✅ Simplicity: Easier to install and maintain, requiring fewer sensors and control components.
✅ Reduces Duct Static Pressure: The bypass feature helps maintain balanced air distribution.
✅ Lower Cost: More affordable than pressure-independent systems due to simpler design.
✅ Simplicity: Easier to install and maintain, requiring fewer sensors and control components.
✅ Reduces Duct Static Pressure: The bypass feature helps maintain balanced air distribution.
Things to Consider**
Things to Consider**
Less Precise Control: Without a direct flow measurement, temperature and airflow regulation can be inconsistent.
Potential Energy Inefficiency: Since bypassed air is not fully utilized, it may reduce overall system efficiency.
Dependent on System Stability: Works best in systems with stable duct pressures; fluctuations can lead to performance issues
Less Precise Control: Without a direct flow measurement, temperature and airflow regulation can be inconsistent.
Potential Energy Inefficiency: Since bypassed air is not fully utilized, it may reduce overall system efficiency.
Dependent on System Stability: Works best in systems with stable duct pressures; fluctuations can lead to performance issues
Round Inlet/Rectangular Outlet Bypass VAV (DVBP)
Round Inlet/
Rectangular Outlet
Bypass VAV (DVBP)
A Pressure-Dependent Bypass Variable Air Volume (VAV) Box is an HVAC component used to regulate airflow to different zones in a building while maintaining comfort and energy efficiency.
Unlike pressure-independent VAV boxes, these units do not have a direct flow measurement device. Instead, they modulate airflow based on duct pressure changes and bypass excess air back to the return plenum or duct.
General Specifications
Type: Pressure-Dependent Bypass Variable Air Volume (VAV) Box
Application: Single-zone, small commercial, residential HVAC systems
Mounting: Ceiling or duct-mounted
Performance Data
Airflow Capacity: 100 to 2,400 CFM (Cubic Feet per Minute) (varies by model)
Operating Static Pressure: 0.05” to 1.5” w.g. (inches of water gauge)
Bypass Airflow Ratio: Adjustable from 20% to 80%
Control Type: Mechanical or electronic damper actuation
Minimum Airflow Setpoint: 10% to 30% of maximum airflow
Construction Details
Casing Material: 20-gauge galvanized steel
Bypass Damper: Opposed blade or round damper with sealing gasket
Lining: Closed cell elastomeric foam for sound attenuation is provided as standard. Options are available.
Inlet Sizes(mm): 150, 200, 250, 300, 350, 400 diameter options
Outlet Sizes: Varies as per general arrangement drawings
Bypass Outlet: Integrated bypass damper with airflow regulation
Control & Compatibility
Actuation Options:
Electronic (modulating actuator, 24V/230V control signal)
Thermostat Compatibility: Compatible with standard modulating analog or digital thermostats
Control Signal Type: 0-10V DC
Integration: Can be used with building automation systems (BAS) (modulation however is only temperature based and actual air flow data can be monitored on BAS since inlet airflow will always remain constant (part directed into the conditioned space and part bypassed)
General Specifications
Type: Pressure-Dependent Bypass Variable Air Volume (VAV) Box
Application: Single-zone, small commercial, residential HVAC systems
Mounting: Ceiling or duct-mounted
Performance Data
Airflow Capacity: 100 to 2,400 CFM (Cubic Feet per Minute) (varies by model)
Operating Static Pressure: 0.05” to 1.5” w.g. (inches of water gauge)
Bypass Airflow Ratio: Adjustable from 20% to 80%
Control Type: Mechanical or electronic damper actuation
Minimum Airflow Setpoint: 10% to 30% of maximum airflow
Construction Details
Casing Material: 20-gauge galvanized steel
Bypass Damper: Opposed blade or round damper with sealing gasket
Lining: Closed cell elastomeric foam for sound attenuation is provided as standard. Options are available.
Inlet Sizes(mm): 150, 200, 250, 300, 350, 400 diameter options
Outlet Sizes: Varies as per general arrangement drawings
Bypass Outlet: Integrated bypass damper with airflow regulation
Control & Capability
Actuation Options:
Electronic (modulating actuator, 24V/230V control signal)
Thermostat Compatibility: Compatible with standard modulating analog or digital thermostats
Control Signal Type: 0-10V DC
Integration: Can be used with building automation systems (BAS) (modulation however is only temperature based and actual air flow data can be monitored on BAS since inlet airflow will always remain constant (part directed into the conditioned space and part bypassed)
A Pressure-Dependent Bypass Variable Air Volume (VAV) Box is an HVAC component used to regulate airflow to different zones in a building while maintaining comfort and energy efficiency.
Unlike pressure-independent VAV boxes, these units do not have a direct flow measurement device. Instead, they modulate airflow based on duct pressure changes and bypass excess air back to the return plenum or duct.
General Specifications
Type: Pressure-Dependent Bypass Variable Air Volume (VAV) Box
Application: Single-zone, small commercial, residential HVAC systems
Mounting: Ceiling or duct-mounted
Control & Capability
Actuation Options:
Electronic (modulating actuator, 24V/230V control signal)
Thermostat Compatibility: Compatible with standard modulating analog or digital thermostats
Control Signal Type: 0-10V DC
Integration: Can be used with building automation systems (BAS) (modulation however is only temperature based and actual air flow data can be monitored on BAS since inlet airflow will always remain constant (part directed into the conditioned space and part bypassed)
Construction Details
Casing Material: 20-gauge galvanized steel
Bypass Damper: Opposed blade or round damper with sealing gasket
Lining: Closed cell elastomeric foam for sound attenuation is provided as standard. Options are available.
Inlet Sizes(mm): 150, 200, 250, 300, 350, 400 diameter options
Outlet Sizes: Varies as per general arrangement drawings
Bypass Outlet: Integrated bypass damper with airflow regulation)
Trusted by Industry Leaders
Trusted by Industry Leaders
Our Satisfied Clients and Projects
Some of Our Highlight Projects
2000 VAVs Supplied
1.16 Million Square Feet Office Space
JP Morgan Chase Headquarters
Mumbai, India
1500 VAVs Supplied
26 Acre Commercial Office Space
Applied Materials Headquarters
Chennai, India
2500 VAVs Supplied
Amazon's Largest Office Building in the World
Amazon HYD 13 - Corporate Office
Hyderabad, India
Technical Submittal
Pressure Dependent VAVs have a wide set range of practical applications that make them suitable for both small and large scale commercial purposes
Pressure Dependent VAVs have a wide set range of practical applications that make them suitable for both small and large scale commercial purposes
Here, the outcomes and achievements of the project are highlighted, including user feedback, adoption rates, and industry recognition.
Here, the outcomes and achievements of the project are highlighted, including user feedback, adoption rates, and industry recognition.
Round Inlet/Rectangular Outlet (DVS)
Round Inlet/Rectangular Outlet (DVS)
Users report significant time savings and improved productivity through optimized scheduling recommendations.
Users report significant time savings and improved productivity through optimized scheduling recommendations.
Rectangular Inlet/Rectangular Outlet (RIRO)
High user satisfaction ratings and positive reviews highlight the app's intuitive interface and powerful AI capabilities.
High user satisfaction ratings and positive reviews highlight the app's intuitive interface and powerful AI capabilities.
Flat Oval (DVFO)
The app quickly gained traction among individuals and businesses worldwide, with a steady increase in user adoption and engagement.
The app quickly gained traction among individuals and businesses worldwide, with a steady increase in user adoption and engagement.
Circular (DVR)
The app quickly gained traction among individuals and businesses worldwide, with a steady increase in user adoption and engagement.
The app quickly gained traction among individuals and businesses worldwide, with a steady increase in user adoption and engagement.
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© 2026 – Dynacraft Air Controls
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