How old is your water heater, furnace or AC?

Most water heaters, furnaces and air conditioners hide their build date in the serial number on the rating plate. Each manufacturer uses its own code, so pick your brand below and we’ll show you how to read it, digit by digit, with worked examples from the manufacturer’s own documents. We’re also building a home systems age report that puts every system’s age, typical life and replacement budget in one place.

Find your brandJoin the waitlist
What Year Is isn’t affiliated with any manufacturer. Brand names describe which labels each page covers.

What are you trying to date?

Pick the brand on the rating plate. Brands made in the same factory often share a page because they share a serial format.

Water heaters

Bradford White water heaters
A.O. Smith water heaters
Lochinvar water heaters and boilers

Furnaces, air conditioners and heat pumps

Goodman and Amana furnaces
Goodman and Amana air conditioners and heat pumps
Carrier and Bryant air conditioners and heat pumps
Lennox furnaces
Lennox air conditioners and heat pumps
Daikin air conditioners and heat pumps

Boilers

Weil-McLain boilers

What will the home systems age report include?

The age of every major systemWater heater, furnace, air conditioner, heat pump and boiler, each dated from its serial number.
How long each kind typically lastsTypical service life for each system, with the source for every figure.
What to budget, and whenA replacement timeline for the next ten years, so nothing arrives as a surprise.
One page you can keepHandy for a home sale, a new purchase or the next time a technician asks how old something is.

What will the home systems age report cost?

Home systems age reportThe age of each major system in your home, how long each kind typically lasts, and what to budget for replacing them, in one report.Get your home systems age report
The report isn’t open yet. The button adds you to the waitlist, and we’ll email you the day it opens.

Common questions

Is the report a subscription?

No. The report will be paid for once, per home, and nothing renews.

Where is the serial number on a water heater or furnace?

On the rating plate. On a tank water heater it’s a label on the side of the tank. On a furnace it’s usually inside the front panel, and on an outdoor AC or heat pump it’s on a side panel. Each brand page says where that manufacturer puts it.

What if my label doesn’t match any format here?

Some older units used formats the manufacturer no longer documents. The manufacturer’s customer service line can usually date a unit from its model and serial number.

Every system in your home,
one report.

Join the waitlist and we’ll email you once, the day the report opens.