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Heat pump model numbers starting M3

28 certified units whose model number starts M3, out of every unit in the A to Z. Updated Oct 17, 2026.

One row per certified model number. All 28 in this group are listed; nothing is held back for a second page.

Model numbers starting M3
Model number Type Size class Brands Certified pairings
M3H18HN/O6S4P mini-split 18,000 Btu (1.5-ton) 1 3
M3H18HS/O6S4P mini-split 18,000 Btu (1.5-ton) 1 3
M3H27H/O4S4P mini-split 30,000 Btu (2.5-ton) 1 3
M3OD31-18HFN10-M1X mini-split 18,000 Btu (1.5-ton) 1 6
M3OD31-18HFN10-M1X-D mini-split 18,000 Btu (1.5-ton) 1 6
M3OD31-18HFN10-M1XD mini-split 18,000 Btu (1.5-ton) 1 6
M3OD31-18HFN10-M1XD-D mini-split 18,000 Btu (1.5-ton) 1 6
M3OD31-18HFN8-M1XD mini-split 18,000 Btu (1.5-ton) 1 3
M3OF-27HFN1-M mini-split 24,000 Btu (2-ton) 1 1
M3OH-27HFN1-MQ1 mini-split 24,000 Btu (2-ton) 1 2
M3OI-24HFN1-M mini-split 24,000 Btu (2-ton) 1 3
M3OI-28HFN1-M mini-split 30,000 Btu (2.5-ton) 2 9
M3OI-28HFN1-M-L mini-split 30,000 Btu (2.5-ton) 1 3
M3OJ-24HFN1-M mini-split 24,000 Btu (2-ton) 2 9
M3OJ-24HFN1-M-L mini-split 24,000 Btu (2-ton) 1 3
M3OJ-27HFN1-M mini-split 30,000 Btu (2.5-ton) 4 18
M3OJ-27HFN1-M-CO mini-split 30,000 Btu (2.5-ton) 1 3
M3OJ-27HFN1-M-L mini-split 30,000 Btu (2.5-ton) 1 3
M3OK-27HFN1-M mini-split 24,000 Btu (2-ton) 1 6
M3OX430-18HFN10-M1 mini-split 18,000 Btu (1.5-ton) 1 7
M3OX430-18HFN10-M1-D mini-split 18,000 Btu (1.5-ton) 1 6
M3OX430-18HFN10-M1P mini-split 18,000 Btu (1.5-ton) 1 3
M3OX430-18HFPN10-M1 mini-split 18,000 Btu (1.5-ton) 1 1
M3OX430-27HFN8-M1 mini-split 24,000 Btu (2-ton) 1 3
M3S18HN/O6S4P mini-split 18,000 Btu (1.5-ton) 1 3
M3S27H/O4S4P mini-split 30,000 Btu (2.5-ton) 1 3
M3THS2209A91NA mini-split 9,000 Btu 2 2
M3THS2212A91NA mini-split 12,000 Btu (1-ton) 2 2

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Every model number group, A to Z

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