Heat pump model numbers starting FO

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

One row per certified model number. All 20 in this group are listed; nothing is held back for a second page.

Model numbers starting FO
Model number	Type	Size class	Brands	Certified pairings
FOP1442TJAYNA	central	42,000 Btu (3.5-ton)	1	4
FOP1460TJAYNA	central	54,000 Btu (4.5-ton)	1	4
FOP1518TJAYNA	central	18,000 Btu (1.5-ton)	1	1
FOP1518TJAZNA	central	18,000 Btu (1.5-ton)	1	11
FOP1524TJAYNA	central	24,000 Btu (2-ton)	1	1
FOP1524TJAZNA	central	24,000 Btu (2-ton)	1	12
FOP1530TJAYNA	central	30,000 Btu (2.5-ton)	1	1
FOP1530TJAZNA	central	30,000 Btu (2.5-ton)	1	10
FOP1536TJAYNA	central	36,000 Btu (3-ton)	1	2
FOP1536TJAZNA	central	36,000 Btu (3-ton)	1	2
FOP1542TJAYNA	central	42,000 Btu (3.5-ton)	1	57
FOP1542TJAZNA	central	42,000 Btu (3.5-ton)	1	2
FOP1548TJAYNA	central	48,000 Btu (4-ton)	1	1
FOP1548TJAZNA	central	48,000 Btu (4-ton)	1	2
FOP1560TJAYNA	central	54,000 Btu (4.5-ton)	1	1
FOP1560TJAZNA	central	54,000 Btu (4.5-ton)	1	4
FOP1836MJAZCA	central	36,000 Btu (3-ton)	1	1
FOP1924MJAYCA	central	24,000 Btu (2-ton)	1	2
FOP1936MJAYCA	central	36,000 Btu (3-ton)	1	1
FOP1948MJAYCA	central	48,000 Btu (4-ton)	1	1

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