The maker's photo for this series, not this exact size; the outdoor unit grows with capacity
Senville · Single-Zone
SENL-36CD-NL
~$2,070approximate retailer price at last check, equipment only
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Best forLarge open spaces or shops in mild climates where capacity and price matter more than heating efficiency.
The Leto 36k is the cheapest way to put three tons of R-454B heat pump on a wall: about $2,070, $130 under the Pioneer Diamante Pro 36k and $250 under the MRCOOL Advantage 5th Gen 36k. The trade is efficiency, 18.0 SEER2 and 8.5 HSPF2, and a heating floor of 5°F. The listing gives coverage as both 2,000 sq ft and 1,750 sq ft, so size it with a load calculation, not the listing. Wi-Fi is through an included USB kit, with an optional Cielo Breez Max thermostat sold alongside. It fits open basements, garages or a shop in a mild climate; in a house that sees real cold, a single 36k head concentrating heat in one room will leave other rooms behind.
No current listing on NEEP's cold-climate heat pump list (checked October 8, 2026). Senville rates it to keep running down to 5°F; without a listing there's no certified 5°F capacity figure to check that claim against.
Probably not. It needs a 33A minimum circuit ampacity and a 35A maximum breaker. Most homes need new wiring.
Its heating floor is 5°F, with 8.5 HSPF2 and no NEEP certification, so no certified low-temperature capacity is published. It is a low-cost cooling-led unit for moderate climates.
The 5-year parts and compressor coverage is tied to professional installation and online registration. R-454B (A2L) handling is another reason.
The LETO is about $2,070 against about $2,198 for the Pioneer, rated 18.0 SEER2 and 8.5 HSPF2 against 19.0 and 9.0. The Pioneer is also NEEP certified.
Senville · Single-Zone
~$2,090
Cold-climate buyers who want a 1.5-ton single head from an online dealer and will pay for a professional install.
Senville · Single-Zone
~$1,700
Large open living areas in cold states where the budget matters more than the badge.
Series photoSenville · Single-Zone
~$1,650
Small, well-insulated rooms in cold climates where a pro will install a high-efficiency 9k head.