AirEase HVAC Age Lookup Tool
From Lennox International's Allied Air division, AirEase sits a step above Aire-Flo and sells only through independent dealers. The build date helps you judge remaining warranty and how soon to plan a replacement. Decode your AirEase serial number to find the manufacturing date and system age for free.
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Finding Your AirEase Serial Number
Check these four spots on your HVAC system
Common Locations
What to Look For
- White or metallic manufacturer sticker
- Labeled "Serial No." or "S/N"
- Typically 8–12 characters long
- Usually near the model number
Can't find it? Try the electrical access panel on the front of the outdoor unit or inside the air handler cabinet.
Serial Number Examples
Don't worry if yours looks different — each brand has multiple formats and our system can decode most variations.
About AirEase HVAC Systems
Owned by Lennox International
AirEase is a residential HVAC brand from Lennox International's Allied Air Enterprises division, available exclusively through independent dealers. It sits in the middle of the Allied product hierarchy, above Aire-Flo on features and efficiency and below Lennox's own premium brand on price.
All AirEase equipment is built at the Allied facility in Iowa using Lennox engineering standards. Serial numbers follow the same format used across Allied and Lennox brands: a two-digit plant code, then the two-digit year, then a letter for the month.
Common AirEase HVAC Models & Series
The most-installed AirEase residential systems on the market today, organized by tier. Knowing your series helps narrow down service parts and warranty terms.
| Series | Type | Tier | Efficiency | Notes |
|---|---|---|---|---|
| 4SCU20LX | Air Conditioner | Premium | Up to 20 SEER2 | Variable-capacity inverter; the same chassis as Lennox EL18XCV. |
| 4SCU18LE | Air Conditioner | Mid-range | Up to 18 SEER2 | Two-stage scroll compressor. |
| 4SHP18LE Heat Pump | Heat Pump | Mid-range | Up to 18 SEER2 / 9 HSPF2 | Two-stage scroll heat pump. |
| 4AC14L / 4AC13L | Air Conditioner | Entry | Up to 14.3 SEER2 | Single-stage; the volume seller. |
| A97MV | Gas Furnace | Premium | Up to 97 AFUE | Modulating gas, variable-speed ECM blower. |
| A95UH1E | Gas Furnace | Mid-range | Up to 95 AFUE | Single-stage condensing furnace. |
AirEase HVAC Quick Facts
Warranty
AirEase offers a 10-year parts and 10-year compressor warranty when registered within 60 days, with a 20-year heat-exchanger warranty on condensing furnaces. Unregistered units drop to 5 years parts and 5 years compressor.
Expected Lifespan
AC / Heat pumps: 13 to 18 years
Furnaces: 18 to 25 years
Where It's Built
Orangeburg, South Carolina (Allied Air Enterprises plant). AirEase shares production lines with Armstrong Air, Aire-Flo, Concord, and Ducane.
Price Positioning
Mid-tier — typically priced 15-25% below comparable Lennox Elite or Signature equipment for the same Allied chassis.
Known AirEase Issues to Watch For
A short list of patterns reported on AirEase equipment. Most have been addressed with revised designs or service bulletins, but they're useful context if you're diagnosing an older system.
- •Mid-tier AirEase condensers share the copper-aluminum coil joint design used across Allied; some units developed formicary corrosion in homes with off-gassing during the 2010-2015 era.
- •Comfort Sync thermostats used on Pro-series equipment had occasional Wi-Fi pairing issues; firmware updates have addressed most.
- •AirEase distribution is regional — coverage in the western US is thinner than for Lennox-branded equipment, which can affect parts availability.
AirEase HVAC FAQs
Related HVAC Brands
AirEase shares a parent company with these brands, so they often use similar serial number formats and components.
Helpful HVAC Guides
Now that you know your AirEase system's age, these guides help you decide what to do next.
Repair or Replace Your Central Air Conditioner?
Should you repair or replace your AC? Covers the 5,000 rule, repair cost benchmarks, efficiency savings, and when replacement is the smarter choice.
MaintenanceHVAC Maintenance Checklist: What to Do Every Season
A no-fluff seasonal HVAC maintenance checklist. What to DIY each month, what a pro should do twice a year, and what it actually costs to skip it.
Buying GuideWhat Size AC Do I Need? Tonnage Calculator and Guide
How to size a central AC the right way: square footage rules of thumb, when they're wrong, and why a Manual J load calculation is worth insisting on.
Energy EfficiencyHow to Lower Your AC Electric Bill: 12 Proven Ways
Cut summer cooling costs without sweating. 12 changes ranked by payback period, with worked math on what each one actually saves.
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The free HVAC age checker
Time to repair or replace your HVAC system?
Compare free quotes from top-rated local pros near you.
Share this tool with friends!
The free HVAC age checker