Constant Air Volume (‘CAV’) airflow control has its place, for instance in single zone spaces where the demand for ventilation is both constant and predictable. But, more often than not, Variable Air Volume (‘VAV’) airflow control is likely to be the best long-term solution for most commercial, industrial and laboratory environments.
Why? Because VAV airflow control replaces air precisely according to need. This offers several important advantages to building managers:
1. It’s better for profits
While a CAV system runs all day every day, VAV systems can be programmed to stop operating when a space either isn’t in use or, if demand varies, respond dynamically – without compromising on safety or air quality.
We pioneered VAV airflow control in laboratories over 30 years ago and discovered it has the potential to reduce energy consumption and therefore costs by up to 85% which has a direct impact on profitability and is especially significant given the volatility around UK non-domestic energy prices.
Case Study: cost control
When Koura relocated its UK lab operations in an effort to increase production capacity, energy efficiency was a clear priority. As a result, TEL was commissioned by Ventec to install 33 new VAV fume cupboards at the new site and relocate 15 from the existing, converting them from CAV to VAV.
The wholescale move to VAV delivered annual savings of approximately 891,000 kWh, 176 tonnes of CO2, and £75K in energy costs. Find out more here
2. It’s better for the planet
The reduction in carbon emissions facilitated by more energy efficient VAV airflow control helps organisations meet their sustainability goals.
In addition, organisations that prioritise energy efficiency (as part of an overarching sustainability or green framework) differentiate themselves from the competition. By demonstrating the ability to control energy use and costs, they are more attractive to investors and funders.
3. It’s better for people
VAV airflow control helps improve indoor air quality which makes buildings healthier for those who work in or visit them. Good indoor air quality is, for example, directly linked to reduced levels of respiratory illness and absenteeism and makes for a happier more productive workforce.
VAV systems also tend to be quieter, adjusting the amount of conditioned air supplied to any given zone, facilitating a more stable and comfortable environment for workers, visitors and customers.
VAV systems are more complex and have more advanced controls than CAV systems, so it pays to work with a specialist. If you’re considering the switch, give us a call on +44 (0) 1457 865 635.
