Central air conditioners
Carrier Infinity 24ANB1 Variable-Speed Air Conditioner
Installed price varies more between contractors than between brands. Get three quotes.
Variable-speed cooling-only condenser, SEER2 up to 21, designed to pair with a gas furnace.
Our take
A cooling-only condenser makes sense in exactly one situation: you are committed to gas heat and want the best available cooling. If there is any chance you will electrify heating in this equipment's lifetime, a heat pump costs marginally more and gives you the option. Consider carefully before buying a machine that can only do half the job.
Best for
Gas-heated homes replacing an air conditioner only, with no intention of changing the heating system.
Watch out for
A heat pump does everything this does plus heating, usually for a modest premium. Get both quoted before deciding.
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.
Brand-level signal, not a match to this specific model: an owner reported the Carrier condenser that came with their house was oversized for it, and started making a high-pitched noise that temporarily cleared after hosing off the outdoor coil but returned once it dried — consistent with a refrigerant or airflow problem compounding an oversizing issue, not a one-off.
“The AC unit that came with the house was an oversized (for the house) Carrier product.” — StarsFan4Life (homeowner) homeowner, 2010
Central air conditioning problems · Owner/trade forums (misc.) · 2010-06-23 · 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
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.
Rheem RA13NY24AJ1NA Air Conditioner
Single-stage cooling-only condenser, SEER2 13.4 — just above the current federal minimum, Rheem's builder-grade entry tier.
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.