Panasonic CU-E12SD3UA
ducted heat pump · ~1 ton (11,500 BTU/h cooling) · indoor unit CU-E12SD3UA
A ducted heat pump rated HSPF2 9.5 for seasonal heating efficiency.
Buy this system
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
Replacing a central system when you want lower running cost than resistance heat.
The standout number
SEER2 20 cooling efficiency.
The catch
The registry does not publish this unit's heating output at 5°F, so plan sizing with a contractor for very cold weather.
The Verified Label — every certified spec
certified 2023-10-05
status: Active
Efficiency ratings — source: AHRI / ENERGY STAR
Capacity & the cold-climate truth — source: AHRI
Operating cost — computed by Verified HVAC Data
Heating cost
per MMBtu of delivered heat, at U.S. average electricity prices
Vs. electric resistance
cheaper to run than baseboard / strip heat ($55.19/MMBtu)
Computed from this unit's HSPF2 × EIA U.S. average electricity price. Your local price changes the answer — run it with your rates →
Refrigerant, staging & identity
How it ranks
Where this unit sits among the 12,239 heat pumps we track, on the two numbers that decide a heat pump. Percentiles are computed from our corpus (higher = better).
COP at 5°F
Not published
This unit has no published COP at 5°F to rank.
HSPF2
Better than 49%
of the 11,928 units with a published HSPF2
Rebates & incentives
This unit is ENERGY STAR certified, which many utility rebates ask for. The federal 25C tax credit expired on December 31, 2025; the live money now is state and utility programs plus HEEHRA. Check what applies where you live on our rebates page.
Compare similar heat pumps
Frequently asked questions
What does the Panasonic CU-E12SD3UA cost to run?
About $19.82 per MMBtu of delivered heat at the U.S. average electricity price, roughly 64% less than electric resistance heat. Your local electricity price changes the number — use our operating-cost calculator to run it with your rate.
What refrigerant does the Panasonic CU-E12SD3UA use?
R-410A, which has a global-warming potential (GWP) of about 2,088. R-410A is being phased down for new equipment, so newer models increasingly ship with lower-GWP R-32 or R-454B.
Where can I buy the Panasonic CU-E12SD3UA?
Panasonic sells this line through HVAC contractors rather than DIY retail, so the way to buy it is to get installed quotes from local pros. Compare the installed price, not just the equipment price.
Sources. Performance ratings from the AHRI Directory (cited by reference number 9125309; not a verbatim mirror) and ENERGY STAR certification data. Operating-cost ($/MMBtu), savings and percentile figures are computed by Verified HVAC Data from published ratings and EIA U.S. average energy 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.
Calculate cost at your energy prices → Back to the product database