LMU243HV

LMU243HV is in the certified data.

Its certified full-speed heating output at 5°F is 15,600–15,800 Btu/h, 64–68% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

LG · mini-split heat pump

All 131 certified LG models

LMU243HV is in the certified data as of Sep 19, 2026.

24,000 Btu (2-ton)
Mini-split
Variable speed
Canada

Heating at 47°F

23,800

14,700 at 17°F

15,700 at 5°F

Btu/h, certified

2.14 COP at 5°F

Cooling at 95°F

23,000

Btu/h, certified

EER2 12.5 at 95°F

SEER2 20.5

Heating and cooling by outdoor temperature

Heating output
Cooling output
Median of 2-ton mini-split models
Example heating load
Example cooling load
Frosting range, 17 to 45°F

This pairing delivers 23,800 Btu/h of heat at 47°F, 14,700 Btu/h at 17°F, and 15,700 Btu/h at 5°F, 66% of its 47°F rating. It delivers 23,000 Btu/h of cooling at 95°F. At 5°F that is 3,300 Btu/h short of the example heating load of 19,000 Btu/h; at 95°F it is 13,500 Btu/h above the example cooling load of 9,500 Btu/h.

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 2-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 800 sq ft where winters reach 5°F: heating runs from 19,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 9,500 Btu/h 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.

Calculate heating and cooling for your house

AHRI certificate 208132538 · listed by LG · certified Jan 14, 2026 · 1 pairing carries these values

Rebates where you live

Meets the recorded equipment thresholds of 4 programs in 2 states, provinces, or territories:British Columbia (3), Newfoundland and Labrador (1).

All 4 programs by state and province

British Columbia

Newfoundland and Labrador

takeCHARGE Oil to Electric Incentive Program · Newfoundland Power · Newfoundland and Labrador Hydro

Threshold comparisons use the unit’s median certified figures across its pairings, not the pairing selected above. Meeting these thresholds means the equipment may qualify; it does not guarantee approval. Service-area, installation, and product-list requirements also apply.

All rebate programs and their published thresholds

Certified output and power use

Certified output for the selected pairingThe four bars share one scale. The comparison is with the median of 2-ton mini-split models. Heating tests run at 70°F indoors. The cooling test runs at 80°F indoors.
Outdoor temperature	Certified outputBtu/h	vs class median	COPat 5°F
5°Ffull speed	15,7004.60 kW	−17%	2.14
17°Ffull speed	14,7004.31 kW	−27%	NR
47°Fnormal speed	23,8006.98 kW	−5%	NR
95°Fcooling, full load	23,0006.74 kW	—	NR

EER2 12.5 in that test. SEER2 20.5 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test: 2.15kW
Electrical input in the 95°F cooling test: 1.84kW
Seasonal average heating COP: 2.70

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 24,000 Btu heat pumps

2-ton mini-split models

This pairing at 5°F: 15,700 Btu/h
This unit at 5°F median across its pairings: 15,700 Btu/h
Median of 2-ton mini-split models at 5°F: 19,000 Btu/h
Models in this group: 917

This unit is above 6% of them, at number 858 of 917 by heat at 5°F. The middle half of the group runs 18,000 to 23,000 Btu/h.

This size class is defined by cooling capacity, so cooling is not compared here.

Among 24,000 Btu mini-split models, each by its median certified pairing, highest first: 5°F output as a share of its 47°F rating, 839th of 917; HSPF2, 686th of 927 (tied). Models without that figure are left out.

Similar ratings at 47°F

These mini-split models share the nominal cooling size. Comparisons use each model’s median certified figures across pairings.

CU-4Z24BBUC: 24,000 Btu/h at 47°F (this model: 23,800); 27,000 Btu/h at 5°F (this model: 15,700).
AM3-H24/2DR3B: 24,000 Btu/h at 47°F (this model: 23,800); 26,000 Btu/h at 5°F (this model: 15,700).
AOU24RLXFZH: 24,000 Btu/h at 47°F (this model: 23,800); 25,600 Btu/h at 5°F (this model: 15,700).

Closest models by heat at 5°F

Every 24,000 Btu (2-ton) unit, ranked by cooling efficiency, then heating efficiency

Floor area at the cold test point

The median certified output of 15,700 Btu/h at 5°F matches the size calculator’s heating estimate for these floor areas, rounded to about 10 sq ft. Each range divides that output by the climate band’s heating rates.

Floor area by climate band and house condition
Climate band	House condition	Btu/h per sq ft	Approximate sq ft
Mild	Drafty, little insulation	24–42	370–650
Mild	Typical	16–26	600–980
Mild	Tight, well insulated	10–18	870–1,570
Cold	Drafty, little insulation	28–52	300–560
Cold	Typical	18–30	520–870
Cold	Tight, well insulated	12–22	710–1,310
Very cold	Drafty, little insulation	32–58	270–490
Very cold	Typical	22–38	410–710
Very cold	Tight, well insulated	16–28	560–980

This is an estimate, not a house-specific load calculation. Output stays at the 5°F test point for every band; it does not predict output at the band’s winter design temperature.

Certified values for LMU243HV

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.

Certified values for LMU243HV
Heating
	This pairing	All pairings
Heat output at 47°F normal speed	23,800 Btu/h	23,000–24,600 Btu/h
Heat output at 17°F full speed	14,700 Btu/h	14,600–14,900 Btu/h
Heat output at 5°F full speed	15,700 Btu/h	15,600–15,800 Btu/h
Heat output below 5°F	NR	NR
Cold output 5°F output as a % of the 47°F rating	66%	64–68% of its 47°F rating. Tests use different compressor speeds.
COP at 5°F full speed	2.14	2.10–2.18
HSPF2 Region IV	9.2	9.0–9.4
Cooling
Cooling capacity at 95°F full-load test	23,000 Btu/h	22,000–24,000 Btu/h
EER2 at 95°F	12.5	12.5
SEER2 cooling season	20.5	18.5–22.5
Cooling at other temperatures	NR	NR
Equipment and listing
Refrigerant	R-410A
Compressor	Variable speed
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 some pairings
Where it is sold	Canada	Canada
Model string as certified	LMU243HV

Pairings, by indoor-unit class

3 certified pairings

One row per indoor unit certified with this outdoor unit.

Ductless indoor

None listed (the pairing on screen) LG 15,700 Btu/hat 5°F, full speed

3 pairings · 47°F 23,800 Btu/h · 95°F cooling 23,000 Btu/h · Cold output 66% · COP 2.14

Indoor units in the ductless indoor class
Indoor unit	Brand	At 5°FBtu/h · full speed	At 47°FBtu/h · normal speed	At 95°FBtu/h · cooling	Cold output% of 47°F rating	COP 5°Ffull speed	Cold climate	Pairings
None listed (the pairing on screen)	LG	15,700	23,800	23,000	66%	2.14	NC	3

The share is heat output at 5°F divided by the 47°F rating.

Sold as, and units with identical certified values

Brands listing this model number

LG3 pairings

Model number as listed

LMU243HV 3 pairings

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.

History and definitions

History

First certified record: Jan 14, 2026
Most recent certified record: Jan 30, 2026
Measurements reported: Jan 14, 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

Cite or print this page

Heat Pump List, “LMU243HV — certified heat output”. Certified figures dated Sep 19, 2026, checked daily.
https://heatpumplist.com/model/lmu243hv