Understanding your equipment

Finding the rating plate

Almost everything worth knowing about a piece of equipment is printed on one label. Manufacturers call it the rating plate, the data plate or the nameplate.

On a storage water heater it is usually on the side of the cylinder, often the upper third. On a wall-mounted unit it is commonly a label on the side or front. On some boilers the model number is on the control screen rather than the label. On equipment inside a cabinet the plate is often behind a removable front panel, and if reading it means opening anything that is powered or gas-fired, stop and ask a professional instead.

Photograph the whole label, straight on, with enough light that the small print is legible. One good photograph now saves an afternoon later.

What make, model and serial actually mean

The make is the brand printed on the equipment. It is not always the company that built it: private-label and contract manufacture are common, and a recall notice will sometimes name a brand and a different maker in the same sentence.

The model identifies a design. Two units of the same model built years apart can differ in ways that matter to a safety notice.

The serial identifies one specific unit. Manufacturers often encode a manufacture date in it, but each uses its own scheme, and some schemes repeat.

Identity is not condition

Knowing exactly what a piece of equipment is tells you nothing about the state it is in. A twelve-year-old furnace that has been serviced every autumn may outlast a five-year-old one that has never been touched.

This runs the other way too. A missing document is a missing document. It is not evidence that anything is wrong with the equipment, and nothing on this site treats it as though it were.

A recall notice is not a confirmed match

A recall notice describes a population of equipment: certain models, sometimes a manufacture window, sometimes a serial range. Your unit either falls inside the authority’s criteria or it does not.

When a notice names your model, the honest statement is that the notice may apply. Confirming it usually needs the exact criteria the authority published, and sometimes a check only the manufacturer can run.

This is why nothing here will tell you that your equipment is affected, or that it is unaffected. Both are claims that belong to the authority.

Why a manufacture date can be uncertain

Some manufacturers encode the date as digits, some as letters, and some have changed the scheme over the years without renaming it.

At least one common scheme uses a letter for the year and cycles through the alphabet, which means the same letter comes round again about twenty years later. A serial alone cannot tell you which of the two it was. Without something else to go on, the answer is genuinely two answers.

That is why this site does not currently interpret serial numbers into dates. A date that is confidently wrong by twenty years is worse than no date at all. An installation invoice, a permit, or a date printed elsewhere on the label is usually the better evidence.

Documentation worth keeping

The installation invoice, which usually carries the date, the model and the installer. The permit, if one was pulled. Any service record, however brief. The manual. A photograph of the rating plate.

Keep them where the next owner of the building can find them. Paperwork tends to leave with the person who filed it, and that is the single most common reason a building’s history disappears.

Photographing equipment safely

Photograph what is visible with the equipment as you found it: the rating plate, the overall unit, the venting where you can see it, and the space around it.

Do not remove panels, open cabinets, or move anything to get a better angle. Do not photograph inside an electrical panel. If you cannot read a label from where you are standing, that is a question for a professional, not a reason to reach further in.

When to stop and call a qualified professional

If you smell gas, leave and call the emergency number for your gas utility or emergency services from outside.

If a carbon monoxide alarm sounds, leave and call emergency services.

Call a licensed professional for anything involving combustion, venting, gas piping, refrigerant, or the electrical panel. Call one before acting on a recall notice, and follow the manufacturer’s instructions and the authority’s remedy over any general guidance, including this page.

A warranty policy is not your coverage

Published warranty terms describe what a manufacturer offered for a product line, in a market, during a period. They are a starting point, not a determination.

What a particular unit is actually covered for depends on the certificate in force when it was sold, whether it was registered, whether the owner is the original purchaser, how it was installed, and whether the company still exists to honour it.

Nothing on this site can tell you whether your equipment is under warranty, and anything that claims to without checking those things is guessing.