
ALT-M
Wall-mounted heat pumps
A ductless system for residential spaces, renovations and your next private-label range.
Discuss this familyModels and specifications
DETAILS MAKE THE DIFFERENCE
Every model. In detail.
Documentary basis: catalogue dated February 28, 2026; technical review dated September 18, 2026. Catalogue values are indicative. Ratings for documented matched systems come from archived June–July 2026 records. Current status and OEM mapping require confirmation.
ALT-M12
- Cooling at 95°F (BTU/h)
- 12,000
- Heating at 47°F (BTU/h)
- 12,500
- SEER2
- 25
- EER2
- 12.8
- HSPF2 · Region IV
- 9.4
- Maximum indoor airflow · catalogue (CFM)
- 424
- Maximum indoor sound pressure (dB(A))
- 40
- Indoor dimensions (in)
- 33.46 × 11.46 × 7.99
- Indoor net / gross weight (lb)
- 22 / 27.5
- Outdoor sound pressure (dB(A))
- 53
- Outdoor dimensions (in)
- 32.68 × 21.26 × 12.8
ALT-M18
- Cooling at 95°F (BTU/h)
- 18,000
- Heating at 47°F (BTU/h)
- 18,500
- SEER2
- 21
- EER2
- 12.8
- HSPF2 · Region IV
- 9
- Maximum indoor airflow · catalogue (CFM)
- 529
- Maximum indoor sound pressure (dB(A))
- 47
- Indoor dimensions (in)
- To validate
- Indoor net / gross weight (lb)
- 28.6 / 36.3
- Outdoor sound pressure (dB(A))
- 55
- Outdoor dimensions (in)
- 35.04 × 23.54 × 14.65
ALT-M24
- Cooling at 95°F (BTU/h)
- 22,000
- Heating at 47°F (BTU/h)
- 24,000
- SEER2
- 23
- EER2
- 12.8
- HSPF2 · Region IV
- 9.8
- Maximum indoor airflow · catalogue (CFM)
- 824
- Maximum indoor sound pressure (dB(A))
- 48
- Indoor dimensions (in)
- 42.56 × 12.87 × 9.76
- Indoor net / gross weight (lb)
- 35.2 / 41.8
- Outdoor sound pressure (dB(A))
- 58
- Outdoor dimensions (in)
- 37.8 × 27.56 × 15.59
18K indoor dimensions require validation. Other dimensions retain the source-table order; confirm drawings and clearances before installation.
Compare all models
| Specification | ALT-M12 | ALT-M18 | ALT-M24 |
|---|---|---|---|
| Cooling at 95°F (BTU/h) | 12,000 | 18,000 | 22,000 |
| Heating at 47°F (BTU/h) | 12,500 | 18,500 | 24,000 |
| SEER2 | 25 | 21 | 23 |
| EER2 | 12.8 | 12.8 | 12.8 |
| HSPF2 · Region IV | 9.4 | 9 | 9.8 |
| Maximum indoor airflow · catalogue (CFM) | 424 | 529 | 824 |
| Maximum indoor sound pressure (dB(A)) | 40 | 47 | 48 |
| Indoor dimensions (in) | 33.46 × 11.46 × 7.99 | To validate | 42.56 × 12.87 × 9.76 |
| Indoor net / gross weight (lb) | 22 / 27.5 | 28.6 / 36.3 | 35.2 / 41.8 |
| Outdoor sound pressure (dB(A)) | 53 | 55 | 58 |
| Outdoor dimensions (in) | 32.68 × 21.26 × 12.8 | 35.04 × 23.54 × 14.65 | 37.8 × 27.56 × 15.59 |
Understanding the data
ALT references are commercial labels, not certified identifiers. Matched systems, voltage, circuit protection, manuals and Canadian status are validated before ordering.
SEER2: seasonal cooling efficiency. EER2: efficiency at a test point. HSPF2: seasonal heating efficiency. IEF: litres of water removed per kWh. Test conditions and matched systems must correspond.
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