5TWX5018A1

Trane · central heat pump

All 104 certified Trane models

5TWX5018A1 is in the certified data as of Sep 19, 2026.

18,000 Btu (1.5-ton)
Central
Single stage
US and Canada

Heating at 47°F

18,300

11,800 at 17°F

8,900 at 5°F

Btu/h, certified

2.10 COP at 5°F

Cooling at 95°F

19,200

Btu/h, certified

EER2 12.0 at 95°F

SEER2 15.5

Heating and cooling by outdoor temperature

Heating output
Cooling output
Median of 1.5-ton central models
Example heating load
Example cooling load
Frosting range, 17 to 45°F

This pairing delivers 18,300 Btu/h of heat at 47°F, 11,800 Btu/h at 17°F, and 8,900 Btu/h at 5°F, 49% of its 47°F rating. It delivers 19,200 Btu/h of cooling at 95°F. At 5°F that is 2,100 Btu/h short of the example heating load of 11,000 Btu/h; at 95°F it is 13,700 Btu/h above the example cooling load of 5,500 Btu/h.

Each bar is a separate certified test, drawn at its outdoor temperature, starting at zero. The 47°F figure is at one speed; the 17 and 5°F figures are at full speed. The short dark line on each bar is the median of 1.5-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 450 sq ft where winters reach 5°F: heating runs from 11,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 5,500 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 215863960 · listed by Trane · certified Jun 3, 2026 · 1 pairing carries these values

Certified output and power use

Certified output for the selected pairingThe four bars share one scale. The comparison is with the median of 1.5-ton central 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°Fone compressor speed	8,9002.61 kW	−21%	2.10
17°Fone compressor speed	11,8003.46 kW	−6%	NR
47°Fone compressor speed	18,3005.36 kW	+2%	NR
95°Fcooling, full load	19,2005.63 kW	—	NR

EER2 12.0 in that test. SEER2 15.5 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test: 1.24kW
Electrical input in the 95°F cooling test: 1.60kW
Seasonal average heating COP: 2.34

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 18,000 Btu heat pumps

1.5-ton central models

This pairing at 5°F: 8,900 Btu/h
This unit at 5°F median across its pairings: 8,900 Btu/h
Median of 1.5-ton central models at 5°F: 11,200 Btu/h
Models in this group: 243

This unit is above 30% of them, at number 171 of 243 by heat at 5°F. The middle half of the group runs 8,600 to 18,000 Btu/h.

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

Among 18,000 Btu central models, each by its median certified pairing, highest first: 5°F output as a share of its 47°F rating, 189th of 243; HSPF2, 190th of 254. Models without that figure are left out.

Similar ratings at 47°F

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

ML15KSPV-018-230A: 18,500 Btu/h at 47°F (this model: 18,300); 13,900 Btu/h at 5°F (this model: 8,900).
AHU18HPV1BO: 18,000 Btu/h at 47°F (this model: 18,300); 20,400 Btu/h at 5°F (this model: 8,900).
AHU3G-18HFN-B: 18,000 Btu/h at 47°F (this model: 18,300); 18,600 Btu/h at 5°F (this model: 8,900).

Closest models by heat at 5°F

Every 18,000 Btu (1.5-ton) unit, ranked by cooling efficiency, then heating efficiency

Floor area at the cold test point

The median certified output of 8,900 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	210–370
Mild	Typical	16–26	340–560
Mild	Tight, well insulated	10–18	490–890
Cold	Drafty, little insulation	28–52	170–320
Cold	Typical	18–30	300–490
Cold	Tight, well insulated	12–22	400–740
Very cold	Drafty, little insulation	32–58	150–280
Very cold	Typical	22–38	230–400
Very cold	Tight, well insulated	16–28	320–560

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 5TWX5018A1

6 pairings · 6 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 5TWX5018A1
Heating
	This pairing	All pairings
Heat output at 47°F one speed	18,300 Btu/h	17,200–18,600 Btu/h
Heat output at 17°F full speed	11,800 Btu/h	11,200–12,200 Btu/h
Heat output at 5°F full speed	8,900 Btu/h	8,600–9,300 Btu/h
Heat output below 5°F	NR	NR
Cold output 5°F output as a % of the 47°F rating	49%	49–50% of its 47°F rating.
COP at 5°F full speed	2.10	1.90–2.10
HSPF2 Region IV	8.0	7.8–8.1
Cooling
Cooling capacity at 95°F full-load test	19,200 Btu/h	17,800–19,200 Btu/h
EER2 at 95°F	12.0	11.7–12.0
SEER2 cooling season	15.5	15.2–16.0
Cooling at other temperatures	NR	NR
Equipment and listing
Refrigerant	R-454B
Compressor	Single stage
Indoor unit	5TEMCB02AV21+TDR+TSTAT	6 indoor units
Furnace	No furnace	1 furnace
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	US and Canada	US and Canada
Model string as certified	5TWX5018A1

Across 6 certified pairings with 6 indoor models: heat at 5°F 8,600 Btu/h with 5TXCB004AS3+TSTAT to 9,300 Btu/h with 5TEM6B02AV21+TDR+TSTAT; HSPF2 7.8 with 5TEM4B02AC21+TDR+TSTAT to 8.1 with 5TEM6B03AV21+TDR+TSTAT; SEER2 15.2 with 5TEM4B02AC21+TDR+TSTAT to 16.0 with 5TEMCB03AV31+TDR+TSTAT. Endpoints name one indoor model where recorded; the furnace pairing can also change the figures.

Pairings, by indoor-unit class

6 indoor units · 6 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 1 indoor unit

5TXCB004AS3+TSTAT brand not stated 8,600 Btu/hat 5°F, full speed

1 pairing, 1 with a furnace · 47°F 17,200 Btu/h · 95°F cooling 17,800 Btu/h · Cold output 50% · COP 1.90

Indoor units in the furnace paired class
Indoor unit	Brand	At 5°FBtu/h · full speed	At 47°FBtu/h · one speed	At 95°FBtu/h · cooling	Cold output% of 47°F rating	COP 5°Ffull speed	Cold climate	Pairings
5TXCB004AS3+TSTAT	—	8,600	17,200	17,800	50%	1.90	NC	1

Air handler · 5 indoor units

5TEM4B02AC21+TDR+TSTAT brand not stated 9,000 Btu/hat 5°F, full speed

1 pairing · 47°F 18,500 Btu/h · 95°F cooling 19,200 Btu/h · Cold output 49% · COP 2.00
5TEM6B02AV21+TDR+TSTAT brand not stated 9,300 Btu/hat 5°F, full speed

1 pairing · 47°F 18,600 Btu/h · 95°F cooling 19,000 Btu/h · Cold output 50% · COP 2.00
5TEM6B03AV21+TDR+TSTAT brand not stated 9,200 Btu/hat 5°F, full speed

1 pairing · 47°F 18,600 Btu/h · 95°F cooling 18,800 Btu/h · Cold output 49% · COP 2.00
5TEMCB02AV21+TDR+TSTAT (the pairing on screen) brand not stated 8,900 Btu/hat 5°F, full speed

1 pairing · 47°F 18,300 Btu/h · 95°F cooling 19,200 Btu/h · Cold output 49% · COP 2.10
5TEMCB03AV31+TDR+TSTAT brand not stated 8,900 Btu/hat 5°F, full speed

1 pairing · 47°F 18,300 Btu/h · 95°F cooling 19,200 Btu/h · Cold output 49% · COP 2.10

Indoor units in the air handler class
Indoor unit	Brand	At 5°FBtu/h · full speed	At 47°FBtu/h · one speed	At 95°FBtu/h · cooling	Cold output% of 47°F rating	COP 5°Ffull speed	Cold climate	Pairings
5TEM4B02AC21+TDR+TSTAT	—	9,000	18,500	19,200	49%	2.00	NC	1
5TEM6B02AV21+TDR+TSTAT	—	9,300	18,600	19,000	50%	2.00	NC	1
5TEM6B03AV21+TDR+TSTAT	—	9,200	18,600	18,800	49%	2.00	NC	1
5TEMCB02AV21+TDR+TSTAT (the pairing on screen)	—	8,900	18,300	19,200	49%	2.10	NC	1
5TEMCB03AV31+TDR+TSTAT	—	8,900	18,300	19,200	49%	2.10	NC	1

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

Showing 6 of 6 indoor units

Sold as, and units with identical certified values

Brands listing this model number

Trane6 pairings

Model number as listed

5TWX5018A1 6 pairings

Variants of the same model number

3 units in this group. Basis: identical certified values in the certified data. This grouping is our inference, not a field in the certified data.

2 of 3 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.

History and definitions

Other 15 Single-Stage Heat Pump with WeatherGuard Top models by nominal cooling size: 5TWX5024A1 (24,000 Btu), 5TWX5036A1 (36,000 Btu), 5TWX5042A1 (42,000 Btu), 5TWX5048A1 (42,000 Btu), 5TWX5060A1 (54,000 Btu).

History

First certified record: Jun 3, 2026
Most recent certified record: Jun 3, 2026
Measurements reported: Jun 3, 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, “5TWX5018A1 — certified heat output”. Certified figures dated Sep 19, 2026, checked daily.
https://heatpumplist.com/model/5twr5018a1