MMLD048S6S-1P
MMLD048S6S-1P is in the certified data.
Its certified full-speed heating output at 5°F is 52,000–54,000 Btu/h15.24–15.83 kW, 96–100% of its 47°F rating (tests at different compressor speeds), depending on the pairing.
Lennox · mini-split heat pump
MMLD048S6S-1P is in the certified data as of Sep 19, 2026. MMLD048S6S-1P changed its certified heat output at 47°F on 2 pairings in the certified data between August 2025 and September 2026. The new figure is higher on all 2.
- 48,000 Btu (4-ton)
- Mini-split
- Variable speed
- US and Canada
Certified heating and cooling
Heating at 47°F
54,00015.83NR
No 47°F rating for this pairing.
41,00012.02NR at 17°F
54,00015.83NR at 5°F
Btu/hkW, certified
1.80NR COP at 5°F
Heating and cooling by outdoor temperature
This pairing delivers 54,000 Btu/h15.83 kW of heat at 47°F, 41,000 Btu/h12.02 kW at 17°F, and 54,000 Btu/h15.83 kW at 5°F, 100% of its 47°F rating. It delivers 47,000 Btu/h13.77 kW of cooling at 95°F. At 5°F that is 12,000 Btu/h3.52 kW above the example heating load of 42,000 Btu/h12.31 kW; at 95°F it is 26,000 Btu/h7.62 kW above the example cooling load of 21,000 Btu/h6.15 kW.
Each bar is a separate certified test, drawn at its outdoor temperature, starting at zero. The 47°F figure is at normal speed; the 17 and 5°F figures are at full speed. The short dark line on each bar is the median of 4-ton mini-split models, one value per model. The shaded 17 to 45°F band is the frosting range: the outdoor coil can frost, and the unit pauses to defrost.
The dashed lines are example loads for a typical area of about 1,750 sq ft where winters reach 5°F: heating runs from 42,000 Btu/h12.31 kW at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 21,000 Btu/h6.15 kW at 95°F, at 1,000 sq ft per ton. A house in a hot climate or with large west-facing windows can need twice as much cooling. They are examples, not your building.
AHRI certificate 215810033 · listed by Lennox · certified Apr 17, 2026 · 1 pairing carries these values
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Threshold comparisons use the unit’s certified figures across its pairings. Programs also set service-area, installation, and product-list requirements.
Certified output and power use
| Outdoor temperature | Certified outputBtu/h | One scale | vs class median | COPat 5°F |
|---|---|---|---|---|
| 5°Ffull speed | 54,00015.83 kW | +29% | 1.80 | |
| 17°Ffull speed | 41,00012.02 kW | +8% | NR | |
| 47°Fnormal speed | 54,00015.83 kW | +10% | NR | |
| 95°Fcooling, full load | 47,00013.77 kW | — | NR |
EER2 11.7 in that test. SEER2 18.0 over the modeled cooling season.
Power use at each temperature
- Electrical input in the 5°F full-speed test
- 8.79kW
- Electrical input in the 95°F cooling test
- 4.02kW
- Seasonal average heating COP
- 2.78
These exclude backup resistance heat.
How it compares with other 48,000 Btu heat pumps
4-ton mini-split models
- This pairing at 5°F
- 54,000 Btu/h15.83 kWNR
- This unit at 5°F median across its pairings
- 54,000 Btu/h15.83 kW
- Median of 4-ton mini-split models at 5°F
- 42,000 Btu/h12.31 kW
- Models in this group
- 321
This unit is above 98% of them, at number 5 of 321 by heat at 5°F. The middle half of the group runs 37,000 to 47,500 Btu/h.
Closest models by heat at 5°F
- AC048DXSCCGSamsung · 54,000 Btu/h
- MXZ-SM48NLHZMitsubishi Electric · 54,000 Btu/h
- PUMY-HL48NKMUMitsubishi Electric · 54,000 Btu/h
- ZRUM048GSS0LG · 54,000 Btu/h
- PUZ-AK48NLHZMitsubishi Electric · 52,000 Btu/h
- SUZ-AK48NLHZMitsubishi Electric · 52,000 Btu/h
Every 48,000 Btu (4-ton) unit, ranked by cooling efficiency, then heating efficiency
Certified values for MMLD048S6S-1P
3 pairings · 3 AHRI certificates
This pairing is the one shown above. Under all pairings, a single figure means every pairing agrees and a range means the pairing decides.
| This pairing | All pairings | |
|---|---|---|
| Heating | ||
| Heat output at 47°F normal speed | 54,000 Btu/h15.83 kWNR | 54,000 Btu/h15.83 kW |
| Heat output at 17°F full speed | 41,000 Btu/h12.02 kWNR | 41,000–42,000 Btu/h12.02–12.31 kW |
| Heat output at 5°F full speed | 54,000 Btu/h15.83 kWNR | 52,000–54,000 Btu/h15.24–15.83 kW |
| Heat output below 5°F | NR | NR |
| Cold output 5°F output as a % of the 47°F rating | 100%NR | |
| COP at 5°F full speed | 1.80NR | 1.80 |
| HSPF2 Region IV | 9.5NR | 9.5–10.4 |
| Cooling | ||
| Cooling capacity at 95°F full-load test | 47,000 Btu/h13.77 kWNR | 47,000–48,000 Btu/h13.77–14.07 kW |
| EER2 at 95°F | 11.7NR | 11.7–12.2 |
| SEER2 cooling season | 18.0NR | 18.0–20.0 |
| Cooling at other temperatures | NR | NR |
| Equipment and listing | ||
| Refrigerant | R-32 | |
| Compressor | Variable speed | |
| Indoor unit | MDDD048S6-1P | 3 indoor units |
| Furnace | No furnace | None |
| Cold-climate designation EPA's designation, as published | Yes | On every pairing |
| ENERGY STAR Most Efficient EPA's designation, as published | Yes | On every pairing |
| Where it is sold | US and Canada | US and Canada |
| Model string as certified | MMLD048S6S-1P | |
Pairings, by indoor-unit class
3 indoor units · 3 certified pairings
One row per indoor unit certified with this outdoor unit.
Ductless indoor · 3 indoor units
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M33D048S6-1P (the pairing on screen) LENNOX 54,000 Btu/h15.83 kWat 5°F, full speed
-
MDDD048S6-1P (the pairing on screen) LENNOX 54,000 Btu/h15.83 kWat 5°F, full speed
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MMD048S6-1P (the pairing on screen) LENNOX 52,000 Btu/h15.24 kWat 5°F, full speed
| Indoor unit | Brand | At 5°FBtu/hkW · full speed | At 47°FBtu/hkW · normal speed | At 95°FBtu/hkW · cooling | Cold output% of 47°F rating | COP 5°Ffull speed | Cold climate | Pairings |
|---|---|---|---|---|---|---|---|---|
| M33D048S6-1P (the pairing on screen) | LENNOX | 54,00015.83 | 54,00015.83 | 48,00014.07 | 100% | 1.80 | Yes | 1 |
| MDDD048S6-1P (the pairing on screen) | LENNOX | 54,00015.83 | 54,00015.83 | 47,00013.77 | 100% | 1.80 | Yes | 1 |
| MMD048S6-1P (the pairing on screen) | LENNOX | 52,00015.24 | 54,00015.83 | 48,00014.07 | 96% | 1.80 | Yes | 1 |
Sold as, and units with identical certified values
What affects the price
We don't have prices. These things drive the cost.
- The size of the unit, and the indoor equipment on the same certificate.
- Whether existing ductwork is reused, altered, or replaced.
- The electrical work: a circuit, a disconnect, and sometimes a panel change.
- Refrigerant line length and how the outdoor unit is mounted.
- Permits and inspection, which vary by municipality.
- Removing and disposing of the old equipment.
- Local labor rates and how busy the season is.
- Rebates and tax credits, which change and have deadlines.
Product history
- MMLD048S6S-1P changed its certified heat output at 47°F on 2 pairings in the certified data between August 2025 and September 2026. The new figure is higher on all 2.
- MMLD048S6S-1P changed its certified heat output at 47°F on 2 pairings in the certified data between March 2025 and May 2025. The new figure is lower on all 2.
- MMLD048S6S-1P first appeared in the certified data between September 2024 and November 2024.
History and definitions
History
- First certified record
- Most recent certified record
- Measurements reported
- Apr 17, 2026
- Status
- In the certified data
Field definitions
- COP
- Heat delivered for each unit of electricity used. A COP of 2.5 gives 2.5 times the heat of an electric baseboard heater.
- HSPF2
- Heating efficiency over a typical season. Higher uses less electricity.
- SEER2
- Cooling efficiency over a typical season. Higher uses less electricity.
- EER2
- Cooling output divided by electrical input in the 95°F full-load test, in Btu/h per watt.
- Cold output
- Heat output at 5°F as a percentage of the 47°F rating.
- % of rating at 17°F
- Heat output at 17°F as a percentage of the 47°F rating.
NR not in the certified dataNC not cold-climate certifiedSP single pairing onlyVP varies by pairing; see the pairings tableWD withdrawn since the certified data was last read