Variable Volume Pressure Systems

This free online CPD course from BESA Academy is presented by Oventrop and covers the correct application of commissioning products, differential pressure control valves, thermostatic radiator valves, and pressure independent control valves in heating and cooling systems. The course explores how to improve system commissionability, introduce energy savings through correct commissioning, and maximise cost savings.

This course is free of charge and CIBSE accredited for CPD. Download your certificate on completion.

What You Will Learn

This 40-minute course covers:

• The correct application of commissioning products in variable volume systems
• The application and positioning of differential pressure control valves
• The correct selection and operation of thermostatic radiator valves
• The use of pressure independent control valves (PICVs)
• How to improve system commissionability
• How to introduce energy savings by correct commissioning
• How to maximise cost savings through effective control valve selection and installation

Who Should Take This Course?

This course is suitable for heating engineers and installers working with hydronic heating and cooling systems, building services designers and consultants specifying control valves and commissioning products, commissioning engineers responsible for balancing and system optimisation, facilities and maintenance professionals managing existing heating and cooling systems, and anyone involved in the design, installation, or commissioning of variable volume heating and chilled water systems.

Why Variable Volume System Design Matters

Variable volume heating and cooling systems adjust flow rates to match demand, improving energy efficiency and occupant comfort. However, without correct commissioning products and control valves, these systems can suffer from poor performance, uneven temperatures, noise, and wasted energy.

Understanding how to select and position differential pressure control valves, thermostatic radiator valves, and pressure independent control valves ensures systems operate as designed, deliver consistent performance, and maximise energy savings.

The Benefits of This Course

Completing this course will help you:

• Understand the correct application of commissioning products in variable volume systems
• Select and position differential pressure control valves effectively
• Apply thermostatic radiator valves and pressure independent control valves correctly
• Improve system commissionability and reduce commissioning time
• Introduce energy savings through correct valve selection and commissioning
• Earn CIBSE-accredited CPD to support your professional development

Course Format

Duration: 40 minutes
Format: 100% online, self-paced
Assessment: Knowledge check questions at the end of the course
Certification: CPD certificate available to download on completion
Accreditation: CIBSE accredited
Cost: Free of charge

Frequently Asked Questions

What is a variable volume pressure system?
A variable volume pressure system is a heating or cooling system where the flow rate changes according to demand. This allows the system to operate more efficiently by delivering only the amount of water needed at any given time, helping to improve comfort and reduce energy use.

Why is pressure control important in variable volume systems?
Without proper pressure control, variable volume systems can suffer from noise, unstable flow rates, poor temperature control, and wasted energy. Effective pressure management helps the system remain balanced and ensures valves and terminal units operate correctly.

What is the role of a differential pressure control valve?
A differential pressure control valve helps maintain a stable pressure difference across part of the system. This improves control valve performance, reduces the risk of overflow, and helps maintain consistent operation as system demand changes.

What is a pressure independent control valve (PICV)?
A pressure independent control valve combines flow regulation and control in one valve. It maintains the correct flow rate even when system pressure changes, making it easier to commission the system and improving energy efficiency and control accuracy.

How do thermostatic radiator valves support system efficiency?
Thermostatic radiator valves regulate the heat output of individual emitters by adjusting flow according to room temperature. This helps prevent overheating, improves occupant comfort, and reduces unnecessary energy consumption.

Who should take this course?
This course is suitable for heating engineers, commissioning engineers, building services designers, consultants, installers, and facilities professionals involved in the design, installation, commissioning, or maintenance of variable volume heating and cooling systems.

How long does the course take to complete?
The course takes approximately 40 minutes to complete. It is delivered online and can be studied at your own pace, making it easy to fit around work commitments.

Will I receive a certificate after completing the course?
Yes. After successfully completing the course and the knowledge check questions, you will be able to download a CIBSE-accredited CPD certificate confirming your participation.