Construction
HVAC: from commissioning to maintenance
The handover between whoever installs and whoever maintains is where the documentation later needed gets lost.
An HVAC installation generates documentation at two widely separated moments: when it is fitted and commissioned, and then for years every time someone services it. The problem is that the same company rarely does both, and in that gap exactly what is needed when something fails gets lost.
What is produced and who holds it
| Document | When | Who usually holds it |
|---|---|---|
| Design or installation specification | Before | The installer or the engineers |
| Installation and commissioning certificate | At completion | The installer, and sometimes only them |
| Charge and equipment records | At fitting and at each intervention | Whoever handles it, who may be someone else |
| Periodic inspections | Throughout its life | Whichever maintainer is current |
Important
The second row is the most often lost and the most needed: **the commissioning certificate is issued by the installer, who gets paid and leaves**. If the owner does not claim it at that moment, three years later they will be asking a company they no longer have a relationship with — and that, when the system has a problem or something must be justified, is precisely the worst moment.
The handover, which is where it fails
- 1
Gather the documentation before paying the final application
It is the only real lever, and it works in HVAC as in any trade.
- 2
File it by equipment, not by company
The installer changes; the machine stays for twenty years.
- 3
Give it complete to whoever will maintain it
A maintainer without the commissioning record works blind and you will notice at the first breakdown.
- 4
And add each intervention to the same file
Even if a different company does it each year.
Watch out
A detail that only surfaces when the maintainer changes: **whoever handles certain equipment and gases needs a specific licence, and that licence belongs to the person or company, not to the equipment**. Checking it is the job of whoever hires, not of whoever turns up in the van. And it must be checked valid on the days they worked, not only on the day the contract was signed.
What gets asked for later
All four are asked for by an insurer after an incident, by an inspector, or by the next owner. And all four are answered from the equipment's file if they were kept, or not answered at all.
Worth knowing
Which inspections are mandatory, how often, and which licences are required depend on the installation type, the refrigerant and the applicable rules, which get updated. **Confirm with your engineer or maintainer**; this describes what documentation exists and where it gets lost.
›What if the installer no longer exists?
Reconstruct what you can from what is available and note what is missing and why.
›Does the maintainer's job sheet count as a record?
Yes, if it goes into the equipment's file the same day and not into an annual folder.
›Does this apply to a single unit in an office?
Yes, and it costs less: one file per unit even if there are only two.
A real case
The situation
An owner changes maintainer and the new one asks for the commissioning record, which nobody has.
What you do
- On the next project, claims the documentation before the final payment application
- Files everything by equipment rather than by company
What you get
The next change of maintainer is settled by handing over the equipment's complete file.
The situation
Commissioning is documented and then lost.
What you do
- Captures the record at the moment
What you get
The document reaches the file.
The situation
Later maintenance does not know what was installed.
What you do
- Stores the file with the installation
What you get
Whoever maintains it finds what went in.
The situation
Calendar inspections get forgotten.
What you do
- Warns about each due date in advance
What you get
The calendar keeps itself.
The situation
A unit still under warranty is repaired.
What you do
- Records which warranties are live
What you get
The avoidable cost is avoided.
The situation
A client asks you to evidence an old intervention.
What you do
- Keeps the history per installation
What you get
You answer without reconstructing.
This article answers
- hvac installation documentation
- installation and commissioning certificate
- refrigeration maintenance records
- f-gas handling documentation