Heat pump model numbers starting WP

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

One row per certified model number. All 18 in this group are listed; nothing is held back for a second page.

Model numbers starting WP
Model number	Type	Size class	Brands	Certified pairings
WP14AY42AJ2N	central	42,000 Btu (3.5-ton)	4	28
WP14AY48AJ2N	central	48,000 Btu (4-ton)	2	2
WP14AY60AJ2N	central	54,000 Btu (4.5-ton)	4	43
WP14AZ36AJ2N	central	36,000 Btu (3-ton)	2	2
WP15AY18AJ2N	central	18,000 Btu (1.5-ton)	4	12
WP15AY24AJ2N	central	24,000 Btu (2-ton)	4	11
WP15AY30AJ2N	central	30,000 Btu (2.5-ton)	4	8
WP15AY36AJ2N	central	36,000 Btu (3-ton)	4	311
WP15AY42AJ2N	central	42,000 Btu (3.5-ton)	4	328
WP15AY48AJ2N	central	48,000 Btu (4-ton)	4	8
WP15AY60AJ2N	central	54,000 Btu (4.5-ton)	4	35
WP15AZ18AJ2N	central	18,000 Btu (1.5-ton)	4	55
WP15AZ24AJ2N	central	24,000 Btu (2-ton)	4	78
WP15AZ30AJ2N	central	30,000 Btu (2.5-ton)	4	82
WP15AZ36AJ2N	central	36,000 Btu (3-ton)	4	14
WP15AZ42AJ2N	central	42,000 Btu (3.5-ton)	4	10
WP15AZ48AJ2N	central	48,000 Btu (4-ton)	4	10
WP15AZ60AJ2N	central	54,000 Btu (4.5-ton)	4	8

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