What is the SEER2 rating of the Elios DEA18HOS28230E8?

The Elios DEA18HOS28230E8 is rated at up to 21.5 SEER2 and 12.5 EER2 for cooling and up to 11.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 18.0-21.5.

Is the Elios DEA18HOS28230E8 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Elios DEA18HOS28230E8 cost to run per year?

At its rated efficiency it costs about $382-$1,009 a year in electricity in large U.S. cities, depending on climate and local rates - for example $469 in Phoenix and $842 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Which indoor units work with the Elios DEA18HOS28230E8?

ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use ELIOS DEA18HIW25230E8, ELIOS DUA18HICU230X5, ELIOS DE18HIW23230E3.

What refrigerant does the Elios DEA18HOS28230E8 use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

18,000 BTU mini-split heat pump · DE-series

Elios DEA18HOS28230E8

Below average cooling efficiency and very good heating efficiency for a 18,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #269 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $424 a year to run in a mixed climate like Atlanta.

SEER2: 21.5 Cooling efficiency over a season
Below average · beats 39%
HSPF2: 11.3 Heating efficiency over a season
Very good · beats 81%
EER2: 12.5 Cooling efficiency on a 95°F day
Average · beats 44%
Heat at 5°F: 18,000 BTU/h100% of its 47°F output
Average · beats 48%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 18,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 81% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Cooling cost matters most - its SEER2 is below average for mini-splits.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications18,000 BTU, R-410A

General
Brand	Elios
Outdoor unit model	DEA18HOS28230E8
Series	DE-series
Type	Mini-split heat pump
Nominal size	18,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	January 26, 2019
Last certified	June 29, 2026
Cooling
SEER2Seasonal efficiency, higher is better	21.5 (range 18.0-21.5)
EER2Efficiency at 95°F outdoors	11.7-12.5
Cooling capacity	16,000-18,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.5-11.3
Capacity at 47°F	17,000-19,000 BTU/h
Capacity at 17°F	10,900-15,800 BTU/h
Capacity at 5°F	16,000-18,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.75-2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder100% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with DEA18HIW25230E8 at the standard test temperatures, in BTU/h:

Certified matchups6 indoor units

The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
DEA18HIW25230E8 ELIOS · cold climate	21.5	12.5	11.3	18,000	207742431
DEA18HIW25230E8 ELIOS · cold climate	21.5	12.5	11.3	18,000	207742431
DUA18HICU230X5 ELIOS · cold climate	20.0	12.5	9.5	16,000	207742441
DE18HIW23230E3 ELIOS	19.4	12.5	10.0	16,400	208119830
DUA24HIDU230X5 ELIOS · cold climate	18.0	12.1	10.5	16,000	207824534
DUA18HIDU230X5 ELIOS · cold climate	18.0	11.7	9.5	17,700	207742454

Yearly running cost in 10 large cities$382-$1,009

Phoenix, AZ$469/yr
Miami, FL$382/yr
Houston, TX$421/yr
Atlanta, GA$424/yr
Los Angeles, CA$412/yr
New York, NY$1,009/yr
Chicago, IL$819/yr
Denver, CO$680/yr
Seattle, WA$418/yr
Minneapolis, MN$842/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the Elios DEA18HOS28230E8?: The Elios DEA18HOS28230E8 is rated at up to 21.5 SEER2 and 12.5 EER2 for cooling and up to 11.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 18.0-21.5.
Is the Elios DEA18HOS28230E8 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Elios DEA18HOS28230E8 cost to run per year?: At its rated efficiency it costs about $382-$1,009 a year in electricity in large U.S. cities, depending on climate and local rates - for example $469 in Phoenix and $842 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Which indoor units work with the Elios DEA18HOS28230E8?: ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use ELIOS DEA18HIW25230E8, ELIOS DUA18HICU230X5, ELIOS DE18HIW23230E3.
What refrigerant does the Elios DEA18HOS28230E8 use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $465/yrYou save $446/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump Elios DEA18HOS28230E8

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $465
Current system, per year: $911
You save per year: $446
Payback: 14.6 years
Net after 10 years: -$2,044

Cooling $287Heating $178Electricity used: 2,906 kWhSaved vs. a minimum-efficiency heat pump: $235

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

Similar 18,000 BTU models

DIYCOOL ACIQ-18ZPL-HP230B · cold climate21.5 SEER2 · 11.3 HSPF2
EMI MHSZ118DA · cold climate21.5 SEER2 · 11.3 HSPF2
DIRECT AIR DIRM-18HXPRO28-1Z · cold climate21.5 SEER2 · 11.3 HSPF2
Franklin MSH183E23MCAA · cold climate21.5 SEER2 · 11.3 HSPF2
ComfortStar CHF18CD(O) · cold climate21.5 SEER2 · 11.3 HSPF2
Franklin MSH183F25MCAA · cold climate21.5 SEER2 · 11.3 HSPF2
Comfort-Aire A-VMH18SV-1 · cold climate21.5 SEER2 · 11.3 HSPF2
Kepler ODUMOX430-17HFN1MT0W · cold climate21.5 SEER2 · 11.3 HSPF2

See all 465 18,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 29, 2026. How we use the data.