What is the SEER2 rating of the Lennox LDT024H4E*1P?

The Lennox LDT024H4E*1P is rated at up to 15.4 SEER2 and 11.4 EER2 for cooling and up to 7.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Lennox LDT024H4E*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 2-ton model.

How much does the Lennox LDT024H4E*1P cost to run per year?

At its rated efficiency it costs about $721-$1,978 a year in electricity in large U.S. cities, depending on climate and local rates - for example $896 in Phoenix and $1,658 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Lennox LDT024H4E*1P the same as the Lennox LHT024H4E*1P?

Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

What refrigerant does the Lennox LDT024H4E*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.

2-ton packaged heat pump · ENLIGHT

Lennox LDT024H4E*1P

Average cooling and heating efficiency for a 2-ton packaged heat pump, but not rated for cold climates.

Ranks #7 of 17 2 ton packaged heat pumps for cooling efficiency, and costs about $823 a year to run in a mixed climate like Atlanta.

SEER2: 15.4 Cooling efficiency over a season
Average · beats 51%
HSPF2: 7.3 Heating efficiency over a season
Average · beats 50%
EER2: 11.4 Cooling efficiency on a 95°F day
Below average · beats 38%
Heat at 5°F: 23,800 BTU/h103% of its 47°F output
Very good · beats 88%

A good fit if…

You want a certified 2-ton packaged heat pump at a typical efficiency level.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications2 ton, R-410A

General
Brand	Lennox
Also sold as	ALLIED COMMERCIAL
Outdoor unit model	LDT024H4E*1P
Series	ENLIGHT
Type	Packaged heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	February 2, 2023
Last certified	May 1, 2026
Cooling
SEER2Seasonal efficiency, higher is better	15.4 (range 15.4)
EER2Efficiency at 95°F outdoors	11.4
Cooling capacity	23,600 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.3
Capacity at 47°F	23,000 BTU/h
Capacity at 17°F	17,000 BTU/h
Capacity at 5°F	23,800 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10
ENERGY STAR cold climate	No

Heating output as it gets colder103% 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 matchups2 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.
-	15.4	11.4	7.3	23,800	211198004
-	15.4	11.4	7.3	23,800	211239260

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Lennox LDT024H4E*1P: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Lennox LHT024H4E*1P

Yearly running cost in 10 large cities$721-$1,978

Phoenix, AZ$896/yr
Miami, FL$721/yr
Houston, TX$803/yr
Atlanta, GA$823/yr
Los Angeles, CA$803/yr
New York, NY$1,978/yr
Chicago, IL$1,608/yr
Denver, CO$1,339/yr
Seattle, WA$824/yr
Minneapolis, MN$1,658/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 Lennox LDT024H4E*1P?: The Lennox LDT024H4E*1P is rated at up to 15.4 SEER2 and 11.4 EER2 for cooling and up to 7.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Lennox LDT024H4E*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 2-ton model.
How much does the Lennox LDT024H4E*1P cost to run per year?: At its rated efficiency it costs about $721-$1,978 a year in electricity in large U.S. cities, depending on climate and local rates - for example $896 in Phoenix and $1,658 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Lennox LDT024H4E*1P the same as the Lennox LHT024H4E*1P?: Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
What refrigerant does the Lennox LDT024H4E*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 $892/yrYou save $315/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 LDT024H4E*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: $892
Current system, per year: $1,207
You save per year: $315
Payback: 28.6 years
Net after 10 years: -$5,852

Cooling $539Heating $353Electricity used: 5,577 kWhSaved vs. a minimum-efficiency heat pump: $32

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 2 ton models

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Carrier 50NR-B24---3015.2 SEER2 · 7.2 HSPF2
Carrier 50VR-K24---3015.2 SEER2 · 7.2 HSPF2
Ducane RPHPV-71524P-16.0 SEER2 · 7.2 HSPF2
CHAMPION HEATING AND COOLING PHG6A240752X415.2 SEER2 · 7.2 HSPF2
MRCOOL MDPH18024D · cold climate18.0 SEER2 · 8.8 HSPF2
Day & Night PHR524000K***K115.2 SEER2 · 7.2 HSPF2
Hisense AR-24U3R25U · cold climate18.5 SEER2 · 8.5 HSPF2

See all 17 2 ton packaged heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 1, 2026. How we use the data.