Central air conditioners
York YXT48B21S Air Conditioner
Prices are the outdoor condenser only, before an indoor coil or install labour. This differs from the heat-pump category's equipment_system default because the real market for central-ac specifically skews toward condenser-only replacement — the existing indoor coil or air handler is frequently kept if compatible. Where we only found an equipment-system or installed price, the bridge above is a national planning estimate, so treat those rows as rough. Get contractor quotes for the install itself.
Two-stage cooling-only condenser, SEER2 18, R-410A — York's mid-tier line, a step below its full variable-speed YXV.
Our take
A two-stage 4-ton is a solid middle-ground pick for a mid-size home in a climate with real shoulder seasons: low stage handles mild days quietly and efficiently, full stage covers peak summer load. Notably still on R-410A while York's own single-stage YC4 line has already moved to R-454B — a reminder that a manufacturer's refrigerant transition happens SKU by SKU, not brand-wide.
Best for
Mid-size homes in climates with real shoulder seasons, wanting two-stage comfort without paying for full variable-speed.
Watch out for
No published sound rating found for this specific model — York's marketing references a 'QuietDrive System' without a dB figure, so ask your installer for the actual number before assuming it's quiet.
What sellers are actually charging
Real listings, read on the date shown. Prices change — click through to check before you act on any of them.
| Seller | What you get | Price | Seen |
|---|---|---|---|
| Source4Air.com
online retailer |
York Affinity YXT 4-ton two-stage condenser
YXT48B21S |
$5,662
|
2026-08-16 |
Equipment price is not installed price. The listings above are what the hardware costs. Installation — labour, electrical, refrigerant lines, permits, removing the old system — is typically a similar amount again, and varies more between contractors than between brands. Where we have an installed figure it is labelled as such and comes from someone who actually installs.
What owners and installers report
Collected from trade forums, owner communities and video reviews. Every report links to the original. We synthesise and quote briefly — we don't republish other people's writing.
Every report below traces back to a single source. The sections are broken out by topic because that's how they read, but treat this as one data point, not independent corroboration across topics — a second source agreeing (or disagreeing) would change that.
Sizing and capacity in practice
Whether the unit as installed matches the load, including short-cycling and temperature overshoot from oversizing.
Category-wide finding, not specific to this product: a building-science professional describes second-guessing his own Manual J result and installing a larger unit than the calculation called for — illustrating how oversizing happens even when a buyer knows better, out of a defensible-sounding urge for margin.
“I chickened out and put in a 2 ton unit instead” — Allison A. Bailes III, PhD (Energy Vanguard) trade, 2020
My Big Fat Oversized Air Conditioner · Independent trade-company blogs · 2020-06-15 · read it in context
Sources are linked so you can verify any of this yourself. We don't mirror content — Amazon in particular permits no republication of review text, so where we use retailer data we show the aggregate rating and link out. How we collect and weight this →
Compare against
Carrier Infinity 24ANB1 Variable-Speed Air Conditioner
Variable-speed cooling-only condenser, SEER2 up to 21, designed to pair with a gas furnace.
Trane XV20i Variable-Speed Air Conditioner
Variable-speed cooling-only condenser rated to SEER2 20.5, built around Trane's Climatuff compressor.
Bryant Preferred 148TAN04800W Air Conditioner
Two-stage cooling-only condenser, SEER2 18, EER2 14, built on the same Puron Advance platform Carrier sells as its own mid-tier line.
Lennox Merit ML14KC1-018 Air Conditioner
Entry-tier single-stage cooling-only condenser, SEER2 up to 17, sized for a small home or condo.
Before you buy this
Ask the contractor for the AHRI certificate number for the specific indoor/outdoor combination being installed — ratings apply to matched pairs, not to the outdoor unit alone. Ask whether they will perform a Manual J load calculation rather than sizing off the equipment being replaced. And check your state and utility incentive programmes: there is no federal tax credit for a 2026 installation, so those programmes are now the only incentive money available, and many require approval before installation.