Airflow measured at every terminal
The part of the job that decides whether the system actually works: airflow set at each terminal, leakage traced and made good, readings taken before handover.
A system is not finished until it is measured
Ductwork can be installed perfectly and still deliver the wrong air. Measuring at each terminal is how we know which branch is short, which is over and which damper needs setting.
The check runs with the plant on, because a system that balances with the fan off will not balance with it on.
Branch by branch, with the plant running
What happens on a commissioning visit, and what it is set against.
On the visit
- Airflow measured at every supply and extract terminal
- Dampers set branch by branch until the system is even
- Leakage points traced along the run and made good
- System run with the plant on for the final readings
What is checked against what
Each terminal is set against the system as a whole, not against a notional figure.
Where a terminal cannot be brought into balance, the reason is found and reported to you rather than left in place.
The four things a check catches
Most complaints about a new ductwork system trace back to one of these.
Commissioning questions
What people ask before booking a check.
- Can you check a system someone else installed?
Yes. The method is the same regardless of who put the ductwork in, and the readings are taken at the terminals where the difference shows. - How long does a commissioning visit take?
It depends on how many terminals the system has and how much of it needs resetting. We will say at survey what the visit involves. - Do you re-check the system after handover?
If something is not right we come back to it. Any change to the run is agreed with you before it is made.
Want a system checked or balanced?
Tell us how many terminals are involved and what the system is doing. We will quote the visit from that.