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What Is Demand Controlled Ventilation (DCV)?
Demand Controlled Ventilation (DCV) is a ventilation strategy that adjusts the amount of outdoor air introduced into a building based on real-time occupancy and air quality conditions. Instead of delivering a fixed volume of fresh air at all times, DCV systems respond dynamically to how a space is actually being used.
By using sensors such as carbon dioxide (CO₂), occupancy, or airflow monitors, DCV helps maintain proper indoor air quality while reducing unnecessary energy use. Engineered Temperature Solutions designs DCV systems that integrate seamlessly with rooftop units, DOAS equipment, VAV systems, and building automation platforms to deliver efficient, code-compliant ventilation without sacrificing comfort.
DCV is especially effective in commercial spaces with variable occupancy, where ventilation demand changes throughout the day and energy efficiency is a priority.
Real-Time Ventilation Control
DCV systems automatically adjust outdoor air intake based on actual occupancy and air quality conditions.
Energy Savings Without Compromise
By reducing unnecessary ventilation, DCV lowers heating and cooling loads while maintaining proper indoor air quality.
Code-Compliant Ventilation
DCV supports ASHRAE ventilation requirements by delivering fresh air only when and where it’s needed.
Seamless System Integration
DCV integrates with DOAS units, RTUs, VAV systems, and building automation platforms for coordinated HVAC performance.
Our Services
ETS delivers complete DCV services, supporting efficient ventilation from design through long-term operation.
🚩DCV Red Flags
When Should You Service or Adjust a DCV System?
Key Indicators Your DCV System Needs Attention:
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Poor or inconsistent indoor air quality
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Ventilation not responding to occupancy
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Frequent comfort complaints during peak use
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Sensors showing inaccurate or erratic readings
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Rising energy costs tied to ventilation
DCV issues often appear as air quality complaints or wasted energy long before the ventilation system fully fails.
Inconsistent Indoor Air Quality
Poor or fluctuating air quality often indicates that the DCV system is not adjusting ventilation levels correctly.
Lack of Occupancy Response
Ventilation that does not change with occupancy typically points to sensor, control, or programming issues.
Peak-Use Comfort Complaints
Comfort issues during busy periods can signal delayed ventilation response or incorrect airflow modulation.
Unreliable Sensor Data
Inaccurate or unstable sensor readings usually indicate calibration drift, poor placement, or sensor failure.
Ventilation-Related Energy Waste
Rising energy costs may result from over-ventilation caused by failed controls or outdated DCV strategies.
Every Ventilation Need.
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ETS HVAC Insights
Go inside our commercial HVAC projects and discover how ETS helps Central Ohio businesses upgrade systems, solve problems, and improve building performance year-round.
Frequently Asked Questions
Demand Controlled Ventilation is a strategy that adjusts the amount of outdoor air delivered to a building based on real-time occupancy or air quality conditions rather than a fixed ventilation rate.
DCV systems use sensors, such as CO₂ or occupancy sensors, to determine how many people are in a space and automatically increase or decrease ventilation as needed.
DCV reduces unnecessary ventilation during low occupancy while maintaining proper indoor air quality during peak use, helping lower energy costs without sacrificing comfort or compliance.
DCV is commonly used in offices, schools, gyms, auditoriums, healthcare spaces, and other buildings with fluctuating occupancy levels.
DCV systems may use CO₂ sensors, occupancy sensors, airflow sensors, or a combination of these to determine ventilation demand.
By limiting excess outdoor air during low occupancy, DCV reduces heating, cooling, and dehumidification loads on HVAC equipment.
Yes. DCV can be integrated with rooftop units, DOAS systems, VAV systems, and building automation platforms.
When properly designed, DCV supports compliance with ASHRAE ventilation standards and local building codes.
Key benefits of DCV include:
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Reduced energy consumption
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Improved indoor air quality
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Better ventilation control during peak occupancy
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Lower HVAC operating costs
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Improved system efficiency
No. DCV works alongside ventilation systems by adjusting how much outdoor air is delivered based on demand rather than replacing the ventilation source itself.
DCV sensors should be inspected and calibrated regularly to ensure accurate readings and proper ventilation response.
Common issues include sensor drift, poor sensor placement, incorrect control sequences, and ventilation not responding accurately to occupancy changes.
Yes. DCV is well suited for Ohio’s seasonal temperature swings and varying occupancy patterns, helping control energy use year-round.
Yes. DCV is frequently retrofitted into existing HVAC systems to improve efficiency and ventilation performance without major equipment replacement.
Yes. Engineered Temperature Solutions provides DCV design, installation, integration, maintenance, and optimization services for commercial buildings across Ohio.
Need DCV services in Central Ohio? Request a quote or call (614) 289-8733 to get started.
Frequently asked questions
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