What is the SEER2 rating of the Multi MFG MSD-48HD-B?

The Multi MFG MSD-48HD-B is rated at up to 19.0 SEER2 and 12.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Multi MFG MSD-48HD-B good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 37,000 BTU/h at 5°F with a COP of 2.52, so it is still 2.5 times as efficient as electric resistance heat at that temperature.

How much does the Multi MFG MSD-48HD-B cost to run per year?

At its rated efficiency it costs about $1,190-$3,332 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,487 in Phoenix and $2,800 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 Multi MFG MSD-48HD-B?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses 48HMHP0-M-B.

4-ton central heat pump · HMHP

Multi MFG MSD-48HD-B

Very good cooling efficiency and average heating efficiency for a 4-ton central heat pump, and certified for cold climates.

Ranks #63 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,379 a year to run in a mixed climate like Atlanta.

SEER2: 19.0 Cooling efficiency over a season
Very good · beats 85%
HSPF2: 9.0 Heating efficiency over a season
Average · beats 54%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 37,000 BTU/h77% of its 47°F output
Excellent · beats 99%

A good fit if…

You want low cooling bills - its SEER2 beats 85% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 37,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications4 ton, R-454B

General
Brand	Multi MFG
Outdoor unit model	MSD-48HD-B
Series	HMHP
Type	Central heat pump
Nominal size	4 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	May 21, 2025
Last certified	March 11, 2026
Cooling
SEER2Seasonal efficiency, higher is better	19.0 (range 19.0)
EER2Efficiency at 95°F outdoors	12.0
Cooling capacity	48,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0
Capacity at 47°F	48,000 BTU/h
Capacity at 17°F	36,600 BTU/h
Capacity at 5°F	37,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.52
ENERGY STAR cold climate	Yes

Heating output as it gets colder77% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 48HMHP0-M-B 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.
48HMHP0-M-B · cold climate	19.0	12.0	9.0	37,000	217509951

Yearly running cost in 10 large cities$1,190-$3,332

Phoenix, AZ$1,487/yr
Miami, FL$1,190/yr
Houston, TX$1,334/yr
Atlanta, GA$1,379/yr
Los Angeles, CA$1,348/yr
New York, NY$3,332/yr
Chicago, IL$2,712/yr
Denver, CO$2,260/yr
Seattle, WA$1,393/yr
Minneapolis, MN$2,800/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 Multi MFG MSD-48HD-B?: The Multi MFG MSD-48HD-B is rated at up to 19.0 SEER2 and 12.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Multi MFG MSD-48HD-B good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 37,000 BTU/h at 5°F with a COP of 2.52, so it is still 2.5 times as efficient as electric resistance heat at that temperature.
How much does the Multi MFG MSD-48HD-B cost to run per year?: At its rated efficiency it costs about $1,190-$3,332 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,487 in Phoenix and $2,800 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 Multi MFG MSD-48HD-B?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses 48HMHP0-M-B.
What refrigerant does the Multi MFG MSD-48HD-B use?: It uses R-454B.

Running cost and savings

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

Heat pump $1,487/yrYou save $988/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 Multi MFG MSD-48HD-B

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: $1,487
Current system, per year: $2,475
You save per year: $988
Payback: 18.2 years
Net after 10 years: -$8,116

Cooling $889Heating $597Electricity used: 9,291 kWhSaved vs. a minimum-efficiency heat pump: $412

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 4 ton models

Hisense AUWR-4824P · cold climate19.0 SEER2 · 9.0 HSPF2
Trane 4TWL9048A119.0 SEER2 · 9.0 HSPF2
American Standard 4A6L9048A119.0 SEER2 · 9.0 HSPF2
York YZV60B2119.0 SEER2 · 8.5 HSPF2
Trane 5TWV0X60A1 · cold climate19.0 SEER2 · 9.4 HSPF2
VillaTherm VHP-UCHA-48HDCT-A · cold climate18.5 SEER2 · 10.5 HSPF2
Trane 5HCL5060B1 · cold climate19.0 SEER2 · 9.5 HSPF2
UTL UCHA-48HDCT · cold climate18.5 SEER2 · 9.8 HSPF2

See all 319 4 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 11, 2026. How we use the data.