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Are Grandaire and Viessmann heat pumps the same?

22 model numbers are listed under both Grandaire and Viessmann. For 7 of them the certified record is the same record under each brand.

  • 22 shared model numbers
  • 7 identical records
  • 15 records that differ
  • Updated Oct 26, 2026

How much of each range overlaps

Each brand's range, and how much of it is shared with the other
Brand Units in the certified data Certified combinations Share of its range that is shared
Grandaire 58 587 37.9%
Viessmann 62 200 35.5%

“Share of its range” is shared model numbers divided by that brand's own units. The two shares differ because the two ranges are different sizes. One row per unit (a certified model number), not per brand entry.

The model numbers they share

22 of 22 shown

Model numbers listed under both brands. The 5°F figure is the median across that unit's own certified pairings.

Model numbers listed under both Grandaire and Viessmann
Model number Size class TypeHeat at 5°FBtu/hkW COP at 5°F Pairings Grandaire Viessmann Same record Cold climate
D5CLHAH58AAK 54,000 Btu (4.5-ton) mini-split 53,500 2.00 37 1 3 Differs Yes
D5CUHAH60AAK 54,000 Btu (4.5-ton) central 51,000 1.80 96 4 6 Identical Yes
D5CLHAH48AAK 48,000 Btu (4-ton) mini-split 47,000 2.00 49 1 4 Differs Yes
D5CUHAH48AAK 48,000 Btu (4-ton) central 46,000 1.85 55 3 3 Identical Yes
DLCURAH48ABK 48,000 Btu (4-ton) central 46,000 1.90 34 1 1 Differs Yes
D5CLHAH36AAK 36,000 Btu (3-ton) mini-split 38,000 2.06 49 1 4 Differs Yes
D5CURAH48AAK 48,000 Btu (4-ton) central 38,000 1.85 34 2 2 Identical Yes
D5CURAH60AAK 54,000 Btu (4.5-ton) central 38,000 1.80 13 1 1 Identical Yes
D5CSHAH33AAK 30,000 Btu (2.5-ton) central 34,000 2.00 25 1 2 Differs Yes
D5CUHAH30AAK 30,000 Btu (2.5-ton) central 32,400 1.82 2,792 6 8 Differs Yes
D5CUHAH36AAK 36,000 Btu (3-ton) central 30,400 1.80 2,634 5 8 Differs Yes
D5CURAH36AAK 36,000 Btu (3-ton) central 29,200 1.99 30 2 2 Identical Yes
D5CSHAH24AAK 24,000 Btu (2-ton) mini-split 24,000 2.18 61 1 5 Differs Yes
DLCURAH24ABK 24,000 Btu (2-ton) central 22,600 1.91 60 1 3 Differs Yes
D5CSRAH30AAK 30,000 Btu (2.5-ton) central 20,400 2.10 25 1 2 Differs NC
D5CUHAH24AAK 24,000 Btu (2-ton) central 19,400 1.92 4,122 5 8 Differs Yes
DLCURAH24AAK 24,000 Btu (2-ton) central 19,400 2.10 35 1 1 Differs Yes
D5CURAH24AAK 24,000 Btu (2-ton) central 19,300 1.94 1,095 4 7 Differs Yes
D5CURAH30AAK 30,000 Btu (2.5-ton) central 18,700 1.99 12 1 1 Identical NC
D5CSHAH18AAK 18,000 Btu (1.5-ton) mini-split 18,000 1.95 97 1 8 Differs Yes
D5CUHAH18AAK 18,000 Btu (1.5-ton) central 16,800 1.92 591 5 7 Differs Yes
D5CURAH18AAK 18,000 Btu (1.5-ton) central 11,200 2.00 33 2 2 Identical NC

NC not cold-climate certified — not in the certified data

22 of 22 shared model numbers All brand pairs

Updated Oct 26, 2026 · Methodology