Thermal Zone / AIR-SOURCE HEAT PUMP

TZID18H520ZCS

TZ Series · TZID Series

7 published source records · source checked Sep 21, 2026

SEER2 range16.1–18.8BTU/Wh
HSPF2 range8.2–9.1BTU/Wh
Cooling capacity18,000BTU/h

Each efficiency range summarizes published EPA records for TZID18H520ZCS. 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.

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Heating performance & equipment details

Ranges include the 7 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/Wh16.1–18.87 / 7
EER2 · BTU/Wh11–11.27 / 7
HSPF2 · BTU/Wh8.2–9.17 / 7
Cooling capacity · BTU/h18,0007 / 7
Heating capacity at 47°F / 8.3°C · BTU/h18,000–19,0007 / 7
Heating capacity at 17°F / −8.3°C · BTU/h11,000–12,6007 / 7
Heating capacity at 5°F / −15°C · BTU/h10,000–11,2007 / 7
COP at 5°F / −15°C1.8–27 / 7
Equipment / loop typeHP - Split System7 / 7
Refrigerant / source-reported GWPR-454B (GWP:470 | Lower GWP)7 / 7
Compressor stagingContinuously variable7 / 7
Connected capabilityNo7 / 7

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
TZID18H520ZAMAHRI reference: 21804339218.809.10112002.00EPA 4523909
TZID24H520ZACB+ furnace: ML193DF070XE36B*AHRI reference: 21807995017.708.30100001.80EPA 4569797
TZID24H520ZACA+ furnace: RL18060A12MPS1AHRI reference: 21878219217.008.20100001.80EPA 4706502
TZID24H520ZACB+ furnace: MGV96U060B3CAHRI reference: 21807968716.408.40100001.90EPA 4569859
TZID24H520ZACB+ furnace: RL18080B12MPS1AHRI reference: 21807983916.208.30100001.90EPA 4569809
TZID24H520ZACB+ furnace: MGV96U080B3CAHRI reference: 21807968816.108.40100001.90EPA 4569858
TZID24H520ZACA+ furnace: RL18040A12MPS1AHRI reference: 21878219116.108.20100001.80EPA 4706503

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 →