If your window unit is losing the battle against a Southern summer, Walmart has a ductless option worth a look: the Costway Lithzen 12,000 BTU WiFi Mini Split Air Conditioner/Heater is marked down to $395.99, with free shipping.
What’s the Deal
This is a 12,000 BTU mini split rated at 18.2 SEER2, which is a strong efficiency number for this category — the higher the SEER2 rating, the less that unit costs to run over a long, hot cooling season. It’s a two-in-one system, handling both cooling and heating, and it connects over WiFi for app or voice control, so you can adjust the temperature before you even walk in the door. Per the listing, it’s built to condition rooms up to around 600 sq. ft.
Who This Is Best For
- Homeowners with a room that central air doesn’t reach well — garages, sunrooms, converted attics, or additions that always run hotter (or colder) than the rest of the house
- Anyone tired of window units that block natural light, let in drafts, and have to come out every fall
- Southern households dealing with long cooling seasons where a higher SEER2 rating actually pays for itself in lower electric bills
- Smart home fans who want app-based scheduling instead of walking over to a wall unit to adjust the temperature
How It Compares
Ductless mini splits are a step up from portable or window ACs in both comfort and efficiency, but that jump usually comes with a bigger price tag once you factor in professional installation for the line set and mounting. At $395.99 for the unit itself, this is a relatively accessible entry point into mini split cooling — just budget separately for installation if you’re not doing it yourself.
Caveats
A couple of things worth knowing before you buy: mini splits require mounting an outdoor condenser and running refrigerant lines to the indoor unit, so this isn’t a plug-and-play swap like a window AC — factor in installation time and, if you’re not comfortable with it yourself, installer cost. There’s no confirmed end date on this pricing, so if it fits what you need, don’t sit on it too long.
Bottom Line
At $395.99 shipped for an 18.2 SEER2, WiFi-enabled 12,000 BTU mini split, this is a solid way to add targeted heating and cooling to a problem room without waiting on a full HVAC upgrade.
Get the Costway 12,000 BTU Mini Split at Walmart for $395.99 →