Grandaire / AIR-SOURCE HEAT PUMP

W5H5S18*K*AAA*

15 SEER2 HP

24 published source records · source checked Sep 21, 2026

SEER2 range15.2–15.5BTU/Wh
HSPF2 range7.8–8BTU/Wh
Cooling capacity17,400–18,900BTU/h

Each efficiency range summarizes published EPA records for W5H5S18*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 24 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/Wh15.2–15.524 / 24
EER2 · BTU/Wh11.7–12.524 / 24
HSPF2 · BTU/Wh7.8–824 / 24
Cooling capacity · BTU/h17,400–18,90024 / 24
Heating capacity at 47°F / 8.3°C · BTU/h16,400–18,30024 / 24
Heating capacity at 17°F / −8.3°C · BTU/h10,500–11,00024 / 24
Heating capacity at 5°F / −15°C · BTU/h8,200–8,60024 / 24
COP at 5°F / −15°C1.88–2.124 / 24
Equipment / loop typeHP - Split System24 / 24
Refrigerant / source-reported GWPR-454B (GWP:470 | Lower GWP)24 / 24
Compressor stagingSingle stage24 / 24
Connected capabilityNo24 / 24

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
W5VM32M17XA*+ furnace: WFE*070B048C*AHRI reference: 21419549215.507.8082001.94EPA 3405067
W5VM32M17XA*+ furnace: WFE*070B036C*AHRI reference: 21419546015.507.8082001.94EPA 3406145
FMA5X24**AL*AHRI reference: 21442394515.508.0082002.10EPA 3425267
W5A*25M17XA*+ furnace: WFE*045A036C*AHRI reference: 21412611015.207.8084002.04EPA 3398640
W5A*25M17XA*+ furnace: WFET045A036A*AHRI reference: 21412669715.207.8084002.04EPA 3398662
W5A*25M17XA*+ furnace: WFET070A036A*AHRI reference: 21412670915.207.8084002.06EPA 3398673
W5A*25M17XA*+ furnace: WFE*070A036C*AHRI reference: 21412617015.207.8084002.06EPA 3398727
W5A*25M17XA*+ furnace: WFE*070B036C*AHRI reference: 21412620015.207.8084002.06EPA 3398757
W5A*25M17XA*+ furnace: WFE*070B048C*AHRI reference: 21412623215.207.8085002.06EPA 3398811
W5A*25M17XA*+ furnace: WFE*090B042C*AHRI reference: 21412626415.207.8084002.04EPA 3398843
W5A*25M17XA*+ furnace: WFAX080B048B*AHRI reference: 21412704015.207.8084002.06EPA 3398886
W5A*25M17XA*+ furnace: WFAX060B042B*AHRI reference: 21412700815.207.8084002.04EPA 3398935
W5A*25M17XA*+ furnace: WFEU040B036A*AHRI reference: 21412642315.207.8084002.06EPA 3399016
W5A*25M17XA*+ furnace: WFEU040B036B*AHRI reference: 21412648715.207.8084002.06EPA 3399081
W5A*25M17XA*+ furnace: WFSX080B048B*AHRI reference: 21412710415.207.8085002.04EPA 3399122
W5A*25M17XA*+ furnace: WFEU060B048B*AHRI reference: 21412651915.207.8084002.06EPA 3399168
W5A*25M17XA*+ furnace: WFSU060B048B*AHRI reference: 21412721315.207.8085002.04EPA 3399225
W5A*25M17XA*+ furnace: WFST060B048A*AHRI reference: 21412735815.207.8084002.04EPA 3399385
WCHL305*B*AHRI reference: 21417958315.207.8084001.88EPA 3404857
FMA5X18**AL*AHRI reference: 21442391315.207.8082002.00EPA 3425237

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 →