Senville · Single-Zone
~$800
Senville LETO 12,000 BTU
The safest budget pick for a 450-700 sq ft space on a standard 115V circuit.
- BTU/h
- 12k
- Volts
- 115
- Refrig.
- R-454B
- SEER2
- 21.2
- HSPF2
- 8.7
- Heats to
- 5°F
Senville · Single-Zone
Senville LETO 18,000 BTU
SENL-18CD-NL
~$970approximate retailer price at last check, equipment only
- BTU/h
- 18k
- Volts
- 230
- Zones
- 1
- SEER2
- 19.2
- HSPF2
- 8.7
- Heats to
- 5°F
- Refrig.
- R-454B
- Covers
- 1,000 ft²
- Wi-Fi
- Built in
Best forMild-winter homes that want an inexpensive 18k head and will use it mostly for cooling.
Overview
The Leto is Senville's value wall mount, and at $970 the 18k is one of the cheapest 1.5-ton R-454B heat pumps sold through an established online HVAC dealer. It is rated 19.2 SEER2, 10.5 EER2 and 8.7 HSPF2, a heating floor of 5°F and 24 dBA indoor sound. That puts it in cooling-first territory: the 8.7 HSPF2 is well below the Aura 18k's 11.0 and the Pioneer Pro's 9.5, and below 5°F you are on backup heat. Wi-Fi comes through an included Alexa USB kit, and the 5-year compressor term is half of what the Aura gets. It suits a south or mid-latitude home that wants an inexpensive cooling-heavy system with occasional shoulder-season heat.
- $970 for 1.5 tons
- Cheapest 18k in this catalog
Cold-weather output
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.
Strengths and catches
Strengths
- +Low price: about $970 for a complete outdoor and indoor pair
- +Wi-Fi USB kit included
- +19.2 SEER2 is competitive with MRCOOL Advantage 5th Gen 18k (19.2)
- +24 dBA indoor sound floor
Catches
- −8.7 HSPF2 is a weak heating rating
- −Only rated to 5°F for heating
- −5-year compressor term is half the Aura's
- −Lineset is not included
Questions buyers ask
Is the Senville LETO 18k a good heater?+
It is rated to only 5°F, with 8.7 HSPF2, and no NEEP certification. It is a cooling-first unit that also heats in mild weather. For cold winters use the AURA 18k.
Why is it so inexpensive?+
At about $970 it is the cheapest 18k in this range. Its 19.2 SEER2 and 8.7 HSPF2 account for the savings.
Do I need a pro to install it?+
Yes, if you want the warranty: Senville requires a professional install. The lineset is sold separately, 1/4 in. and 1/2 in. at 15 to 50 ft. The breaker is 15 to 20 A, and R-454B (A2L) calls for an installer aware of it.
Similar systems
Everything from Senville
Series photoSenville · Single-Zone
~$700
Senville LETO 9,000 BTU
Bedrooms and offices under 450 sq ft where quiet operation matters most.
- BTU/h
- 9k
- Volts
- 115
- Refrig.
- R-454B
- SEER2
- 21.5
- HSPF2
- 9
- Heats to
- 5°F
Senville · Single-Zone
~$1,250
Senville LETO 24,000 BTU
Large open spaces — basements, garages, or great rooms up to ~1,250 sq ft.
- BTU/h
- 24k
- Volts
- 208/230
- Refrig.
- R-454B
- SEER2
- 18.7
- HSPF2
- 9.3
- Heats to
- 5°F