LDT048H4E*1P
LDT048H4E*1P is in the certified data.
Its certified full-speed heating output at 5°F is 36,400 Btu/h10.67 kW, 83% of its 47°F rating (tests at different compressor speeds) across its certified pairings.
Allied Commercial and Lennox · central heat pump
LDT048H4E*1P is in the certified data as of Sep 19, 2026. LDT048H4E*1P returned to the certified data between August 2025 and September 2026.
- 42,000 Btu (3.5-ton)
- Central
- Two-stage
- US and Canada
Certified heating and cooling
Heating at 47°F
44,00012.90NR
No 47°F rating for this pairing.
26,0007.62NR at 17°F
36,40010.67NR at 5°F
Btu/hkW, certified
2.30NR COP at 5°F
Heating and cooling by outdoor temperature
This pairing delivers 44,000 Btu/h12.90 kW of heat at 47°F, 26,000 Btu/h7.62 kW at 17°F, and 36,400 Btu/h10.67 kW at 5°F, 83% of its 47°F rating. It delivers 44,500 Btu/h13.04 kW of cooling at 95°F. At 5°F that is 3,400 Btu/h1.00 kW above the example heating load of 33,000 Btu/h9.67 kW; at 95°F it is 27,500 Btu/h8.06 kW above the example cooling load of 17,000 Btu/h4.98 kW.
Each bar is a separate certified test, drawn at its outdoor temperature, starting at zero. The 47°F figure is at high stage; the 17 and 5°F figures are at full speed. The short dark line on each bar is the median of 3.5-ton central 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 1,400 sq ft where winters reach 5°F: heating runs from 33,000 Btu/h9.67 kW at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 17,000 Btu/h4.98 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 211198006 · listed by Lennox · certified Apr 22, 2026 · 2 pairings on 2 certificates share 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 | 36,40010.67 kW | +10% | 2.30 | |
| 17°Ffull speed | 26,0007.62 kW | −16% | NR | |
| 47°Fhigh stage | 44,00012.90 kW | 0% | NR | |
| 95°Fcooling, full load | 44,50013.04 kW | — | NR |
EER2 12.0 in that test. SEER2 15.6 over the modeled cooling season.
Power use at each temperature
- Electrical input in the 5°F full-speed test
- 4.64kW
- Electrical input in the 95°F cooling test
- 3.71kW
- Seasonal average heating COP
- 2.11
These exclude backup resistance heat.
How it compares with other 42,000 Btu heat pumps
3.5-ton central models
- This pairing at 5°F
- 36,400 Btu/h10.67 kWNR
- This unit at 5°F median across its pairings
- 36,400 Btu/h10.67 kW
- Median of 3.5-ton central models at 5°F
- 33,000 Btu/h9.67 kW
- Models in this group
- 222
This unit is above 58% of them, at number 94 of 222 by heat at 5°F. The middle half of the group runs 20,000 to 40,000 Btu/h.
Closest models by heat at 5°F
- 293VAN048**AA*Bryant · 36,600 Btu/h
- B5H3V48*K*AAA*ACiQ, Airquest + 7 more · 36,600 Btu/h
- 25VNA448A*031*Carrier · 36,400 Btu/h
- NAZ17V6022A1Navien · 35,400 Btu/h
- YZV48B21York · 35,200 Btu/h
- AUWR-48U3SPHisense · 34,600 Btu/h
Every 42,000 Btu (3.5-ton) unit, ranked by cooling efficiency, then heating efficiency
Certified values for LDT048H4E*1P
2 pairings · 2 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 high stage | 44,000 Btu/h12.90 kWNR | 44,000 Btu/h12.90 kW |
| Heat output at 17°F full speed | 26,000 Btu/h7.62 kWNR | 26,000 Btu/h7.62 kW |
| Heat output at 5°F full speed | 36,400 Btu/h10.67 kWNR | 36,400 Btu/h10.67 kW |
| Heat output below 5°F | NR | NR |
| Cold output 5°F output as a % of the 47°F rating | 83%NR | |
| COP at 5°F full speed | 2.30NR | 2.30 |
| HSPF2 Region IV | 7.2NR | 7.2 |
| Cooling | ||
| Cooling capacity at 95°F full-load test | 44,500 Btu/h13.04 kWNR | 44,500 Btu/h13.04 kW |
| EER2 at 95°F | 12.0NR | 12.0 |
| SEER2 cooling season | 15.6NR | 15.6 |
| Cooling at other temperatures | NR | NR |
| Equipment and listing | ||
| Refrigerant | R-410A | |
| Compressor | Two-stage | |
| Indoor unit | None listed | None |
| Furnace | No furnace | None |
| Cold-climate designation EPA's designation, as published | NC | NC |
| ENERGY STAR Most Efficient EPA's designation, as published | No | On no pairings |
| Where it is sold | US and Canada | US and Canada |
| Model string as certified | LDT048H4E*1P | |
Pairings, by indoor-unit class
2 certified pairings
One row per indoor unit certified with this outdoor unit.
Unspecified
-
None listed (the pairing on screen) brand not stated 36,400 Btu/h10.67 kWat 5°F, full speed
| Indoor unit | Brand | At 5°FBtu/hkW · full speed | At 47°FBtu/hkW · high stage | At 95°FBtu/hkW · cooling | Cold output% of 47°F rating | COP 5°Ffull speed | Cold climate | Pairings |
|---|---|---|---|---|---|---|---|---|
| None listed (the pairing on screen) | — | 36,40010.67 | 44,00012.90 | 44,50013.04 | 83% | 2.30 | NC | 2 |
Sold as, and units with identical certified values
Brands listing this model number
Other brands that list these model numbers
Model number as listed
- LDT048H4E*1P 2 pairings
Variants of the same model number
2 units in this group. Basis: identical certified values in the certified data. This grouping is our inference, not a field in the certified data.
1 of 2 shown.
Other model numbers with identical certified values
2 units share this record. Basis: identical certified values in the certified data. This grouping is our inference, not a field in the certified data.
1 of 2 shown.
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
- LDT048H4E*1P returned to the certified data between August 2025 and September 2026.
- LDT048H4E*1P was last in the certified data in records from March 2025; it was not in the list on May 20, 2025.
- LDT048H4E*1P was in the certified data by September 2024.
History and definitions
History
- First certified record
- Most recent certified record
- Measurements reported
- Apr 22, 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