MARATHERM / AIR-SOURCE HEAT PUMP

N5H8T36*K*AAA*

2-STAGE 18 SEER HP

145 published source records · source checked Sep 21, 2026

SEER2 range15.2–17BTU/Wh
HSPF2 range7.8–8.5BTU/Wh
Cooling capacity33,800–38,000BTU/h

Each efficiency range summarizes published EPA records for N5H8T36*K*AAA*. The highest SEER2 and HSPF2 may belong to different combinations. Open a source record below to see its ratings and the scope of its component information.

Model patterns and component strings are preserved exactly. How to read model patterns and combinations →

Heating performance & equipment details

Ranges include the 145 published source records for this model. Values in different rows may describe different configurations. Open an individual record to compare values from the same test configuration.

Reported fieldValue / rangeRecords supplying it
SEER2 · BTU/Wh15.2–17145 / 145
EER2 · BTU/Wh11.7–13145 / 145
HSPF2 · BTU/Wh7.8–8.5145 / 145
Cooling capacity · BTU/h33,800–38,000145 / 145
Heating capacity at 47°F / 8.3°C · BTU/h37,200–39,000145 / 145
Heating capacity at 17°F / −8.3°C · BTU/h23,000–24,200145 / 145
Heating capacity at 5°F / −15°C · BTU/h17,500–19,600145 / 145
COP at 5°F / −15°C1.78–2.48145 / 145
Equipment / loop typeHP - Split System145 / 145
Refrigerant / source-reported GWPR-454B (GWP:470 | Lower GWP)145 / 145
Compressor stagingTwo-stage145 / 145
Connected capabilityNo145 / 145

47°F = 8.3°C; 17°F = −8.3°C; 5°F = −15°C. COP is dimensionless. These are reported rating points, not a prediction of a particular home’s heat demand or operating limit.

Matched systems

Each row is one source record. The component column distinguishes listed combinations from outdoor-model ratings without an indoor configuration.

Indoor unit / required furnaceSEER2BTU/WhHSPF2BTU/WhHeating capacity at 5°F / −15°CBTU/hCOP at 5°F / −15°CRecord & comparison
FTMA5B60L0D*AHRI reference: 21562895717.008.50186002.48EPA 3950956
FTMA5B48L0C*AHRI reference: 21562890316.508.10187002.30EPA 3950445
QFVA5D4821X*AHRI reference: 21869541816.508.10184002.24EPA 4683409
EVM5X48M21A*+ furnace: *80MSU0802120A*AHRI reference: 21561954716.008.00175001.90EPA 3946342
EVM5X49M21A*+ furnace: *80MSU0802120A*AHRI reference: 21561991116.008.00177001.95EPA 3946567
EVM5X49M21A*+ furnace: *95CSU1002122B*AHRI reference: 21562001116.008.00179001.95EPA 3946652
EVM5X49M21A*+ furnace: *96CTN0802120B*AHRI reference: 21562005216.007.80179001.80EPA 3946668
EVD5X38M17A*+ furnace: *80MSU0401712A*AHRI reference: 21562133616.008.00176001.85EPA 3946888
EVD5X38M17A*+ furnace: *80MSU0601716A*AHRI reference: 21562135516.008.00176001.90EPA 3946902
EVD5X38M17A*+ furnace: *80CTL0901716B*AHRI reference: 21562141316.007.80176001.80EPA 3946934
EA*5X37M21A*+ furnace: *80MSU0601716A*AHRI reference: 21563572716.008.10193002.26EPA 3954621
EA*5X37M21A*+ furnace: *95MSU1002122A*AHRI reference: 21563615516.008.10194002.26EPA 3955068
EA*5X43M21A*+ furnace: *80MSU0601716A*AHRI reference: 21563777916.008.10193002.26EPA 3955538
EA*5X43M21A*+ furnace: *80MSU0802120A*AHRI reference: 21563780716.008.50191002.40EPA 3955559
EA*5X43M21A*+ furnace: *95MSU1002122A*AHRI reference: 21563840816.008.10191002.40EPA 3956028
EA*5X48M21A*+ furnace: *80MSU0802120A*AHRI reference: 21563890116.008.10190002.40EPA 3956134
EA*5X37M21A*+ furnace: *80CSU0802120B*AHRI reference: 21572136816.008.00192002.28EPA 3982091
EA*5X43M21A*+ furnace: *80CSU0802120B*AHRI reference: 21572152916.008.00192002.40EPA 3982135
EVD5X38M17A*+ furnace: *80CSU0601716B*AHRI reference: 21571670816.008.00175001.82EPA 3997668
EVD5X38M17A*+ furnace: *80CSU0401712B*AHRI reference: 21571669416.008.00176001.82EPA 3997682

Sources and documentation

The table uses public EPA ENERGY STAR data. AHRI references are reported by EPA and have not been independently checked with AHRI. Source records do not establish availability, installation suitability or rebate eligibility.

No manufacturer manual has been matched to this model.

Collection method, revision history and known limitations →