GUARDIAN RC442E2S11
split central air conditioner · ~3.5 ton (41,000 BTU/h cooling) · matched coil CXF48D5C6S2+JME18D2SN2
A split central air conditioner rated SEER2 15.25 — the seasonal number that sets your summer running cost.
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Sold through HVAC contractors
This unit isn't stocked for DIY online. It's installed by a licensed pro, who also handles the refrigerant charge, permit and warranty. Get a few local quotes so you can compare the installed price.
Get install quotesAt a glance
Who it's for
Cooling a home that needs about 3.5 tons of capacity, replacing an aging AC condenser.
The standout number
SEER2 15.25 (EER2 12.5 at peak 95°F) — higher means lower cooling bills.
The catch
A central AC is contractor-installed — the number that matters is the installed price with a matched coil, so get a few local quotes.
The Verified Label — every certified spec
cert date not published
status: Active
Cooling efficiency — source: AHRI / ENERGY STAR
Capacity & configuration — source: AHRI
Operating cost — computed by Verified HVAC Data
Estimated annual cooling cost
per year at U.S. average electricity prices & a typical cooling season
Efficiency tier
above the federal minimum
Cooling cost falls as SEER2 rises. Your climate and local electricity price change the total — compare running costs →
Refrigerant & identity
How it ranks
Where this condenser sits among the 760 central air conditioners we track, on the two efficiency numbers that decide a cooling bill. Percentiles are computed from our corpus (higher = better).
SEER2
Better than 83%
of the 760 units with a published SEER2
EER2
Better than 81%
of the 760 units with a published EER2
Rebates & incentives
Central AC rebates are thinner than heat-pump rebates and usually require a high SEER2 tier. The federal 25C credit expired December 31, 2025; the live money is state and utility programs. Check what applies where you live on our rebates page.
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Frequently asked questions
How efficient is the GUARDIAN RC442E2S11?
It is rated SEER2 15.25 and EER2 12.5. SEER2 is the seasonal cooling efficiency — the higher the number, the less electricity it uses to remove the same heat. Current federal minimums are SEER2 13.4–14.3 depending on region, so this unit sits well above the floor.
What does the GUARDIAN RC442E2S11 cost to run?
We estimate about $506 a year to cool with it at U.S. average electricity prices and a typical cooling season. Your climate and local power price move the number — cooling cost scales inversely with SEER2.
What refrigerant does the GUARDIAN RC442E2S11 use?
R-454B, which has a global-warming potential (GWP) of about 466. This is one of the lower-GWP refrigerants replacing R-410A.
Where can I buy the GUARDIAN RC442E2S11?
Central AC condensers like this are installed by a licensed HVAC contractor, who matches the coil, pulls the permit and charges the refrigerant. Get a few installed quotes and compare the total price, not just the equipment.
Sources. Performance ratings from the AHRI Directory (cited by reference number 218668409; not a verbatim mirror) and ENERGY STAR certification data. Annual cooling cost and percentile figures are computed by Verified HVAC Data from published ratings and EIA U.S. average electricity prices — see our methodology. Refrigerant GWP is the IPCC value for that refrigerant. We publish no star ratings and take no payment for placement. "Not published" means the source registry doesn't disclose it — we never fill a spec with a guess.