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Six things you should have been handed, and what it costs you that you were not
Almost nobody receives a proper handover on a building’s mechanical services, and almost everybody discovers it at the worst possible moment. Each of these can be rebuilt — but who you have to ask depends entirely on how you came by the building.
Every other item on this page costs you money slowly. Losing access to the controls costs you the building on the first cold morning — nobody can change a schedule, nobody can override a holiday setting, and nobody can put a zone back into occupied mode. It is also the item most likely to be irrecoverable by asking nicely, because the person who set it up has usually gone. Treat it as the urgent one.
A list of what equipment exists
What it is for: knowing what you own, where it is, what it serves and how old it actually is. Every other conversation about the building — budget, priorities, whether a repair is worth doing — depends on it.
What its absence costs: emergencies instead of scheduled work. A unit fails, nobody knows the model, the part is ordered after the second visit rather than the first, and the premises trades badly for a week. It also means you cannot challenge anything you are told about age or condition.
How to rebuild it: one survey visit. Every unit tagged and numbered, plate data copied off, real age decoded from the serial, condition recorded, and what each one serves written down. It is the cheapest document in this list and the one everything else hangs from.
Commissioning and balancing figures
What it is for: proving the building was ever set up to do what it was designed to do — airflows measured room by room, charge verified, controls set to real occupancy hours. It is also the only baseline you will ever have.
What its absence costs: you cannot tell whether a complaint is a fault or the way the building has always been. Somebody says a room has never been right; without a commissioning figure there is no way to know whether it once was. A building nobody commissioned never performs, and nobody finds out for two years.
How to rebuild it: it can be done late. Airflows balanced and recorded, charge verified, controls reset to how the building actually trades, and the figures handed over. It costs a fraction of replacing anything and it converts every future complaint into a comparison.
Manuals, model and serial numbers
What it is for: the model number retrieves the installation instructions, the parts list and the specification sheet. The serial number gives the real age. Between them they answer most technical questions without anybody attending.
What its absence costs: guesswork, and parts ordered on a description rather than a number. It also makes every warranty conversation impossible before it starts.
How to rebuild it: straightforward — the plates are on the equipment. A survey copies them off and photographs each plate. Manufacturers publish documentation by model number, so once the numbers exist the manuals usually follow for free.
Warranty documents and registrations
What it is for: deciding who pays when something large fails. Parts and labour are usually separate terms, and many manufacturers offer a longer parts term if the equipment was registered within a window after installation.
What its absence costs: paying for repairs somebody else owed. It is the item that most often turns out to have real money attached, and the one most often assumed to be gone.
How to rebuild it: model and serial numbers first, then the manufacturer. Registration and coverage both run from the serial, so a manufacturer can usually tell you the position even where the paperwork is lost. It is worth doing before a failure rather than during one.
Access to the controls
What it is for: everything. Schedules, setpoints, holiday exceptions, overrides, and the ability to put a zone back into occupied mode when somebody is working late.
What its absence costs: the building runs on whatever was last programmed, by somebody who has left, to a trading pattern that may no longer exist. It is also the most common root cause of after-hours call-outs that turn out to be settings rather than faults.
How to rebuild it: this varies enormously with the system, and it is the one item that sometimes cannot be recovered without the original installer or the manufacturer. Establish what you have, what level of access exists, and what it would take to regain full control — before the morning you need it. Where credentials genuinely cannot be recovered, replacing the controller is sometimes the honest answer, and it is far cheaper planned than in January.
Filter sizes and service history
What it is for: the least glamorous item here and one of the most useful. Sizes mean the right filters are on the van. History means a trend rather than a stack of invoices.
What its absence costs: filters that do not fit, changed late or not at all, and airflow quietly falling away across a whole building. Without a history there is also no way to see a combustion figure drifting year on year, which is how a heat exchanger announces itself well before it becomes a shutdown.
How to rebuild it: sizes are recorded on the first maintenance visit and never have to be measured again. History cannot be recovered — but it starts the day somebody writes the first set of readings down, and a year from now you will have one.
You bought it — ask the seller, and check the file
- The seller and their agent first. Mechanical documentation is frequently sitting in a file nobody thought to transfer, and asking costs nothing.
- The contractor who last serviced it. They hold service records, and they will usually release them to the current owner on request. Ask the seller who that was.
- The original installer, if the building is young enough. They hold commissioning figures, control credentials and the as-built information nobody else has.
- The manufacturer, with model and serial numbers, for warranty position and documentation.
- Your own conveyancing file. Mechanical schedules and O&M material are sometimes attached to the sale and never read.
The advantage of your position: you own it, so nobody can refuse you access to the plant and nobody else has to approve the survey. Rebuilding all six is a decision you can simply take.
You lease it — much of this belongs to somebody else
- The landlord or managing agent first, in writing, naming exactly what you are asking for. They or their contractor hold most of it.
- Ask what is yours to maintain at the same time. It is the question everything else depends on and the one least often answered clearly.
- The building’s own contractor, if there is one on a service agreement for the plant that serves your space.
- The manufacturer for warranty position, which you can pursue with model and serial numbers whoever owns the equipment.
What your lease actually requires of you is a question for you and your attorney, not for us. What we can do is survey what serves your space, record it, and put the technical findings in writing so you have something to hand over. We will not work on plant outside your demise without the owner’s instruction.
You inherited the role — the information is probably in the building
- Your predecessor’s files, physical and digital. Mechanical paperwork tends to survive in a drawer in the plant room rather than in a document system.
- The plant room itself. Commissioning sheets, wiring diagrams and control notes are frequently taped inside panel doors, and nobody has looked in years.
- Accounts payable. Whoever has been invoicing for maintenance holds the service history, and finding the name takes one search of the ledger.
- The equipment plates for model, serial and real age — which recovers the manuals and the warranty position on its own.
The advantage of your position: you have access to everything and you are not asking anybody’s permission. In our experience the person who has just inherited a building recovers more of this list in a fortnight than an owner does in a year, because they are the only one actually looking.
If you are rebuilding all six
The controls
Because it is the only one that can stop the building, and the only one that gets harder to recover with time.
The equipment list
One survey visit. It produces the model and serial numbers, which recover the manuals and the warranty position for free.
Warranty position
Established from the serial numbers, before a failure rather than during one. This is the item with real money attached.
Filter sizes
Recorded on the first maintenance visit and never measured again.
Commissioning
The largest piece of work and the one worth planning rather than rushing. It gives you the baseline everything after it is compared against.