100-WA-AP1T052038
Viessmann · Geothermal Heat Pump
ENERGY STAR CertifiedGeothermal Heat Pumps →
EER
22.9–29.4BTU/Wh
COP
4.20–5.10
Refrigerant
Other
Rated Across
2loop types
High EERENERGY STAR Most Efficient
Viessmann 100-WA-AP1T052038: EER 29.4 BTU/Wh, better than 94% of geothermal heat pumps (category median 24.1 BTU/Wh).
Where this model sits
EER29.4BTU/Wh
16.1median 24.147.6
Better than 94% of geothermal heat pumps.
COP5.10
3.10median 4.405.60
The Viessmann 100-WA-AP1T052038 is a 29.4 BTU/Wh geothermal heat pump using Other. At 29.4 BTU/Wh it ranks better than 94% of the 2,204 certified geothermal heat pumps models.
Specifications
| Efficiency | |
|---|---|
| EER (best configuration) | 29.4BTU/Wh |
| EER (worst configuration) | 22.9BTU/Wh |
| COP (best configuration) | 5.10 |
| COP (worst configuration) | 4.20 |
| Configuration | |
| Loop Types Rated | 2 |
| Total Configurations Rated | 2 |
| Model Name | Vitocal 100-WA |
| Refrigerant | Other |
All 14 specifications
| Identifiers | |
|---|---|
| Model Number | 100-WA-AP1T052038 |
| ENERGY STAR ID | ES_42211_100-WA-AP1T052038_04202026153004_01218002306 |
| Partner | Viessmann Manufacturing Company |
| Date Qualified | 2026-05-11 |
| Available From | 2025-12-01 |
| Markets | United States, Canada |
Documentation
We link to manufacturer documentation at its original source rather than rehosting it, so you always get the current revision.