Senville
LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD)
The Senville LETO 12K (115V) is a budget single-zone inverter heat pump rated 21.2 SEER2 on R-454B, with quiet 17.5 dB minimum indoor noise and built-in WiFi. It suits rooms of roughly 450 to 750 sq ft.
$800
List priceSENL-12CD with 16 ft kit, Home Outlet Direct / Senville, June 2026. Pre-charged with R-454B for up to 25 ft.
No live retailer for this exact model right now.
The closest single split you can buy today:
Senville Leto 12,000 BTU Mini Split Heat Pump 115VCovers up to 700 sq ft · quiet at 45 dB In stock$817View Or look for this exact model on Amazon:
Search Amazoncompare.ac may earn a commission on purchases, at no cost to you. As an Amazon Associate I earn from qualifying purchases.
Will it cool your room?
This unit's cooling matches your 700 sq ft room, though its rated output is a little under what this room usually needs, so it may run flat out on the hottest days.
Mini-splits are rated on SEER2, a seasonal scale, not the ENERGY STAR annual-kWh figure this dollar estimate is built from, so there is no comparable figure to show here. A blank is missing data, not a worse result: a mini-split is often the more efficient choice.
Installation cost
$2,500-6,000 fully installed for a typical room (the equipment is roughly $700-1,800, professional installation roughly $1,500-4,000+ depending on line-set run, electrical and access). The unit price you see here is hardware only; installation is the larger, separate cost.
A typical range for this system type, for comparison only, not a quote for this unit. The actual price depends on the line-set run, electrical work and access.
What each mini-split size costs todayAt a glance
Best for quiet, low-cost single-zone cooling and heating.
Performance
- Cooling capacity
- 12,000 BTU · 3.5 kW
- Heating capacity
- Yes
- Room coverage
- up to 750 sq ft
- Energy Star
- Not published
- SEER2
- 21.2
- Annual energy (cooling)
- Not published
Noise, size & features
- Model number
- SENL-12CD
- Indoor noise
- 18 dB(A)quieter than a whisper
- Outdoor noise
- Not published
- Indoor unit
- 31.57 x 11.69 x 7.44 in
- Outdoor unit
- Yes
- Refrigerant
- R-454B
- Wi-Fi / app
- Yes
- Outdoor unit needed
- Yes
What is good
- Quiet operation (as low as 17.5 dB indoors) at a low price
- Heat pump works down to about 5F outdoor temperature
- Built-in WiFi and low-GWP R-454B refrigerant
What to watch
- ENERGY STAR status for this exact SKU not confirmed
- Requires a professional to evacuate and connect the line set
- HSPF2 heating rating not published
Installation & the rules that apply
This is a single split. This is where regulation bites. Under EPA Section 608 the refrigerant circuit may only be opened by a certified technician, and the EPA is explicit that this includes connecting or disconnecting the pre-charged line sets sold with "DIY" mini-split kits. No federal law stops you doing the mounting, bracketing and line routing yourself, but handling the refrigerant without certification voids the warranty and is a violation. Most US jurisdictions also require permits for a new outdoor unit: typically mechanical or building for the wall penetration and mount, plus electrical for the dedicated 240 V circuit and disconnect. An HOA nearly always has to approve exterior equipment in advance, and local noise ordinances can cap how loud the condenser may be at the property line. This varies by city and county, so confirm with your building department before buying hardware.
Certified installer
R-454B
Common questions about the Senville LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD)
- How loud is the Senville LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD)?
- 18 dB(A) indoors, quieter than a whisper.
- How energy-efficient is the Senville LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD)?
- Its efficiency rating is SEER2 21.2.
- What size room does the Senville LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD) cool?
- It is rated to cool a room up to 750 sq ft (12,000 BTU · 3.5 kW).
- Do I need a professional to install the Senville LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD)?
- Yes. As a single split it needs a certified installer. Usually needs permission.
- Does the Senville LETO Series 12,000 BTU 21.2 SEER2 115V (SENL-12CD) heat as well as cool?
- Yes. It also heats.
How Senville compares with other brands
Both lineups at every size both brands sell in stock, with live prices, ratings and the warranty each listing states.
How the Senville Leto line compares
Both lines at every size both sell in stock, with live prices, ratings, recalls and what each maker says about its line.
Is a split even the right type?
Compare splits against the other types on price, noise, efficiency and install.
Buying guides for a single split like this
The questions buyers ask, answered from live prices and real specs. See where a single split like this fits.
More split units around 12,000 BTU
Senville
Leto 12,000 BTU Mini Split Heat Pump 115V
A wall-mounted split air conditioner rated at 12,000 BTU for rooms up to 700 sq ft. It heats in winter too.
$817
at Sylvane
Package: 16 ft line set
+ pro install, usually $1,500-4,000
Senville
Leto 12,000 BTU Mini Split Heat Pump 230V
A wall-mounted split air conditioner rated at 12,000 BTU for rooms up to 700 sq ft. It heats in winter too.
$829
at Sylvane
Package: 16 ft line set
+ pro install, usually $1,500-4,000
Lowest since Jul 26, 2026 $829
Pioneer
Diamante Pro 12,000 BTU High-Wall Ductless Mini Split 230V
A wall-mounted split air conditioner rated at 12,000 BTU for rooms up to 500 sq ft. It heats in winter too.
$858
at Sylvane
+ pro install, usually $1,500-4,000
Lowest since Jul 25, 2026 $858