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 — none currently in stock at the observed price. Prices change — click through to check before you act on any of them.
| Seller | What you get | Price | Stock | Seen |
|---|---|---|---|---|
| Source4Air.com
online retailer |
equipment outdoor only | $5,662
|
unknown | 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.
Before you buy — install and sizing lessons
Reported issues about installation, sizing, or the dealer/installer — not the equipment itself. These don't affect the ratings above; they're what to ask your contractor about before you sign a contract.
Sizing and capacity in practice · sizing
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
Compare against
Rheem RA19AY / Ruud UA19AY Inverter Air Conditioner, 5 ton
Current Rheem/Ruud R-454B 5-ton communicating inverter condenser. Rheem's designated test combination with the RHMVY6021SEACAJ modulating air handler delivers 54,000 BTU/h, 17.5 SEER2 and 10.5 EER2.
Rheem RA16AY / Ruud UA16AY Two-Stage Air Conditioner, 5 ton
Current Rheem/Ruud R-454B 5-ton, two-stage cooling-only condenser. It is the middle Rheem/Ruud replacement path between single-stage equipment and the fully communicating inverter system.
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.
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.