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Age of heating equipment & Systems:

How to determine the age of your heating system and components. Here we provide several excellent sources for de-coding the data tag information on heating equipment.

This article provides documents that explain and translate all of the data found on information tags and stickers used on heating & heat pump equipment, including equipment age, heating capacity, electrical requirements, and operating characteristics.

We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

Heating System Equipment Age - Guides for Reading HVAC & Water Heater Equipment Data Tags & Serial Numbers

If you don't know whether your heat is provided by a furnace (hot air) or boiler (hot water), or whether your fuel is oil, gas, or electric, and whether your heat is hot water, steam, or warm air, see HEATING SYSTEM TYPES.

Then return to this page for help finding the equipment's age or date of manufacture.

Five HVAC Heating & Air Conditioning Equipment Age & Data Tag Decoders

Our photo shows data tags on a Weil McLain gas fired heating boiler that was manufactured on 10/10/1996. [Click to enlarge any image]

We found the boiler age by de-coding the boiler's CP/serial number code on the white sticker just above the data tag. Below we explain how we did that.

For help in decoding air conditioner, boiler, furnace, heat pump, water heater data tags and determining the age, model, or specifications of that equipment, we provide five different research methods listed below.

AGE of HEATERS, BOILERS, FURNACES - you are on this page information about approaches to determine heating equipment age.
AIR CONDITIONER BOILER FURNACE AGE, MANUALS & PARTS GUIDES - HVAC - age, history, manuals & manufacturer contact information sorted by individual brand name.
This separate article series gives manufacturer contact information, free manuals and repair guides, and more data tag decoding for just about all heating, air conditioning, and heat pump brands.
You HVAC Equipment Age Decoders sorted by Manufacturer-Brand in These Guides
MANUALS & PARTS GUIDES - HVAC Brands A-E - & Master Index to All Brand Names, HVAC Age, manuals, wiring diagrams, installation and repair guides
MANUALS & PARTS GUIDES - HVAC Brands F-I - Brand Names beginning with F - I HVAC Age, manuals, wiring diagrams, installation and repair guides
MANUALS & PARTS GUIDES - HVAC Brands J-O - Brand Names beginning with J - O HVAC Age, manuals, wiring diagrams, installation and repair guides
MANUALS & PARTS GUIDES - HVAC Brands P-S - Brand Names beginning with P - S HVAC Age, manuals, wiring diagrams, installation and repair guides
MANUALS & PARTS GUIDES - HVAC Brands T-Z - Brand Names beginning with T - Z HVAC Age, manuals, wiring diagrams, installation and repair guides
AGE of AIR CONDITIONERS & HEAT PUMPS DATA TAG DECODER - data tag decoder using the serial number in the data tag to get cooling or heat pump equipment age
AGE of WATER HEATERS provides guides and water heater manuals sorted by brand, with extensive equipment data tag decoding information for water heaters.
Manufacturer websites: A few manufacturers offer free online boiler or furnace data tag decoders that give the equipment's age.
We include links to any such websites we can find both here and in our
ONLINE HVAC EQUIPMENT DATA TAG DECODER
or
AGE of AIR CONDITIONERS & HEAT PUMPS or MANUALS & PARTS GUIDES - HVAC pages that we listed just above.
CONTACT us if you find a helpful manufacturer's site or data tag decoder that's not given in our four sources above.

Free Online HVAC Equipment Data Tag Decoders

We provide links to individual manufacturer's data tag decoding guides (Lennox, below), and to two excellent equipment data tag decoding books, by Scott LeMarr (online at this website) and the Carson Dunlop & Associates Ltd. Technical reference - the most extensive such document we've found.

For many heating or cooling equipment manufacturers, especially after 2000, decoding the equipment tag to obtain the age of the device is sometimes pretty easy.

But equipment age, capacity, specifications are not always so easy to recognize on the data tag. Here we explain how to dig out that information.

[Click to enlarge any image]

1. Lennox HVAC products Age: see our LENNOX Heater & Air Conditioner Model & Serial Number Decoding Guide [PDF] at this website. Also see

2.FURNACE AGE DECODING CHART [PDF] provided by home inspector Scott LeMarr has generously shared his document that decodes both furnace age for many brands of water heater, including hot water systems produced by the following manufacturers.

[PDF linked to return here. You can also use the 'BACK' button on your browser to return to this page at InspectAPedia.com.]

LeMarr's document provides decoding data for the following manufacturers:

Ambassador water heaters, American water heaters [3], ACE water heaters, A.O.Smith water heaters, Apollo, Aqua Temp, Aqua Therm, Best water heaters, Bosch water heaters, Bradford White, Cafos, Champion, Crosley, Energy Saver, Envirotemp water heaters, GE water heaters, Glascote water heaters, Golden Knight water heaters, GSW, Hotpoint water heaters, JC Penny, Jetglas, JW or John Wood, Kenmore water heaters (Sears Brand), Lochinvar, Lowes, Mainstream, Maytag water heaters, Montgomery Wards, Knight, PermGlas, Reliance water heaters, Revere, Rheem water heaters, Rheem/Rudd/Richmond water heaters, Rinnai, Security, Shamrock water heaters, Standard water heaters, State/Reliance/Sears brand water heaters, Thermo-King, Vanguard water heaters, US Craftsmaster, US Water Heaters, and Whirlpool water heaters.

Peerless Heating Boiler Age Decoder
If the boiler was manufactured from 1984 to 1999, the serial number ends in a four digit date code. “123456-1284” would be manufactured in December, 1984.
If the boiler was manufactured from 2000 to present, the serial number ends in a six digit date code. “123456-200505” would be manufactured in May, 2005.

Weil McLain Heating Boiler Age Decoder, at https://www.weil-mclain.com/cp-lookup will decode the heating boiler's CP/Serial Number. At the company's website you will find these instructions:
Enter the 7-digit CP/Serial Number of the boiler to obtain the manufacturing date and any associated information on the product.
If the CP# is only 6 digits, enter a leading zero, e.g. 0137718. This lo

Florida Heat Pump Serial Number