What is the SEER2 rating of the Lennox MPC048S4M-1P?

The Lennox MPC048S4M-1P is rated at up to 23.4 SEER2 and 12.3 EER2 for cooling and up to 8.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Lennox MPC048S4M-1P good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 48,000 BTU model.

How much does the Lennox MPC048S4M-1P cost to run per year?

At its rated efficiency it costs about $975-$3,311 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,299 in Phoenix and $2,841 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

What refrigerant does the Lennox MPC048S4M-1P 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.

48,000 BTU mini-split heat pump · M series

Lennox MPC048S4M-1P

Average cooling efficiency and below average heating efficiency for a 48,000 BTU mini-split heat pump, but not rated for cold climates.

Ranks #19 of 146 48,000 BTU mini-splits for cooling efficiency, and costs about $1,316 a year to run in a mixed climate like Atlanta.

SEER2: 23.4 Cooling efficiency over a season
Average · beats 68%
HSPF2: 8.7 Heating efficiency over a season
Below average · beats 5%
EER2: 12.3 Cooling efficiency on a 95°F day
Below average · beats 35%
Heat at 5°F: 33,000 BTU/h69% of its 47°F output
Below average · beats 9%

A good fit if…

You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You mainly need heat - its HSPF2 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

Specifications48,000 BTU, R-410A

General
Brand	Lennox
Outdoor unit model	MPC048S4M-1P
Series	M series
Type	Mini-split heat pump
Nominal size	48,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	December 18, 2019
Last certified	June 25, 2026
Cooling
SEER2Seasonal efficiency, higher is better	23.4 (range 23.4)
EER2Efficiency at 95°F outdoors	12.3
Cooling capacity	48,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.7
Capacity at 47°F	48,000 BTU/h
Capacity at 17°F	34,000 BTU/h
Capacity at 5°F	33,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	No

Heating output as it gets colder69% kept at 5°F

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

Certified matchups1 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.
- LENNOX	23.4	12.3	8.7	33,000	207699101

Yearly running cost in 10 large cities$975-$3,311

Phoenix, AZ$1,299/yr
Miami, FL$975/yr
Houston, TX$1,169/yr
Atlanta, GA$1,316/yr
Los Angeles, CA$1,311/yr
New York, NY$3,311/yr
Chicago, IL$2,720/yr
Denver, CO$2,287/yr
Seattle, WA$1,425/yr
Minneapolis, MN$2,841/yr

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

Questions4

What is the SEER2 rating of the Lennox MPC048S4M-1P?: The Lennox MPC048S4M-1P is rated at up to 23.4 SEER2 and 12.3 EER2 for cooling and up to 8.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Lennox MPC048S4M-1P good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 48,000 BTU model.
How much does the Lennox MPC048S4M-1P cost to run per year?: At its rated efficiency it costs about $975-$3,311 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,299 in Phoenix and $2,841 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the Lennox MPC048S4M-1P 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 $1,340/yrYou save $1,135/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 Lennox MPC048S4M-1P

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: $1,340
Current system, per year: $2,475
You save per year: $1,135
Payback: 15.9 years
Net after 10 years: -$6,650

Cooling $722Heating $618Electricity used: 8,375 kWhSaved vs. a minimum-efficiency heat pump: $558

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 48,000 BTU models

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MRCOOL MULTI5-48HP230B23.4 SEER2 · 8.7 HSPF2
MDV M5OG-48HFN1-M-L23.4 SEER2 · 9.2 HSPF2
LG ZRUM048GSS0 · cold climate23.3 SEER2 · 10.3 HSPF2
Cooper&Hunter CH-48MES-230VO23.4 SEER2 · 9.2 HSPF2
York YVAHP048B21S23.1 SEER2 · 10.0 HSPF2
Carrier 38MGRBQ48EA323.4 SEER2 · 9.2 HSPF2
Mitsubishi Electric MXZ-SM48NAMHZ2 · cold climate23.0 SEER2 · 11.5 HSPF2

See all 146 48,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 25, 2026. How we use the data.