KeplerX vs TKS: heat pump ratings compared
Against heat pumps of the same size and type, a typical KeplerX model beats 53% and a typical TKS model 50%. KeplerX rates slightly higher overall.
Covers older R-410A heat pumps, no longer installed new. See models sold today · Updated
KeplerX
53%
of similar heat pumps beaten by its typical model
About average8 models listed
TKS
50%
of similar heat pumps beaten by its typical model
About average8 models listed
- Efficiency on a 5°F dayCOP at 5°FKeplerX: Beats 49%TKS: Beats 34%
- Heating power kept at 5°FCapacity at 5°F vs 47°FKeplerX: Beats 78%TKS: Beats 35%
- Winter-long heating efficiencyHSPF2KeplerX: Beats 33%TKS: Beats 57%
- Summer-long cooling efficiencySEER2KeplerX: Beats 22%TKS: Beats 66%
- Hot-day cooling efficiencyEER2KeplerX: Beats 54%TKS: Beats 48%
Average (50%)Dashed outline: the other brand, for comparison
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Rebate standards
CEE 2025
- KeplerX
- 0%
- TKS
- 63%
Xcel CC
- KeplerX
- 0%
- TKS
- 25%
CEE Advanced
- KeplerX
- 0%
- TKS
- 0%
ENERGY STAR CC
- KeplerX
- 0%
- TKS
- 0%
Top cold-climate picks, ductless 3.5–4.5 tons
Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), against units their size.
Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?
KeplerX
No ductless, 3.5–4.5 tons model from KeplerX.
TKS
None of TKS’s ductless, 3.5–4.5 tons models qualifies.
These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.
Next steps
The advanced view adds ranks, both brands’ models inside every size class, standout models per rating and cold-weather curves.
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