Is the Stealth DIYCOOL really DIY?

Mostly. The pre-charged Quick Connect line set removes brazing and refrigerant charging, but you still need to mount the indoor and outdoor units and wire a dedicated 230V circuit. Many buyers hire an electrician for that part.

How big a room will 18,000 BTU cool?

About 1,000 sq ft in a well-insulated space with average ceilings. Hot climates, vaulted ceilings, or poor insulation shrink that; ask the agent to size it against your room.

Does it work as a heat pump in winter?

Yes, it heats and cools. Output falls as outdoor temperatures drop, and no heat strip is listed, so it suits mild-to-moderate winters better than deep-freeze climates.

What comes in the box?

The outdoor condenser, the wall-mounted indoor air handler, a wireless remote, a 16 ft Quick Connect line set, and owner and installation documentation.

Can I control it from my phone?

Yes. Built-in Wi-Fi lets you set temperature and modes from a smartphone or tablet, in addition to the remote.

Mini-split prices tend to dip in shoulder seasons, spring and fall, when HVAC demand is low. Ask the agent to compare current store prices and the price history before buying.

Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V

Q: What do buyers say about the Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V?

Buyers like: Quiet operation inside and out; Installation went smoothly and was easier than expected for DIY; Good product that runs well. Common complaints: Trucking company failed to load the unit on its truck; customer had to pick it up at the distribution center; Issue with system heating after install (resolved without a service call).

Last price we saw

$1,600.80at HVACDirect.com, last seen Oct 31

Prices change often: ask the agent below to check today's price at every store.

Prices are checked against each store and labelled with when.

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Our take on the Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V

The Stealth DIYCOOL 18,000 BTU is a complete single-zone ductless heat pump: a 230V outdoor condenser paired with a wall-mounted air handler, rated 20 SEER2 and sized for rooms up to about 1,000 sq ft. Its selling point is Quick Connect pre-charged line sets, which let a handy homeowner install it without brazing or refrigerant gauges. It uses R454B refrigerant and has built-in Wi-Fi for phone control. The 16 ft line set is included.

Best for

What reviewers say

Owners describe the system as quiet and say installation went more smoothly than expected for a DIY unit. Complaints are mostly about delivery logistics and a few control glitches rather than cooling performance.

Pros

Quiet operation indoors and out
Installation easier than expected
Runs well after setup
Install kit had the needed parts

Cons

Freight carrier missed pickup, forcing a distribution-center pickup
One unit had a heating issue after install, later resolved
Louver swing control stopped responding on one unit

About the Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V

Energy-efficient single-zone ductless comfort with Self-friendly installation and powerful temperature control for larger spaces.

The Stealth DIYCOOL 18,000 BTU Single-Zone Mini Split System provides reliable heating and cooling with the flexibility of ductless installation. Designed with Quick Connect technology, this configuration includes one 18,000 BTU wall-mounted indoor air handler, ideal for rooms up to approximately 1,000 sq. ft.. This single-zone system is an excellent choice for living rooms, offices, apartments, additions, open-concept areas, and other residential spaces where efficient and individualized comfort control is important.

Why Choose the Stealth Standard Series?

DIYCOOL Quick Connect Installation — Pre-charged Quick Connect line sets simplify installation by reducing the need for specialized HVAC tools or refrigerant handling, helping make setup faster and more convenient.

Personalized Single-Zone Comfort — The 18,000 BTU outdoor condenser is paired with an 18,000 BTU wall-mounted indoor air handler, allowing you to control the temperature of one dedicated area with customized comfort settings.

Energy-Efficient Inverter Technology — Variable-speed inverter technology automatically adjusts system performance based on demand to maintain consistent temperatures while improving efficiency and helping reduce energy consumption.

Quiet Indoor Operation — Low-noise operation makes this system ideal for living spaces, bedrooms, home offices, and other areas where quiet, comfortable performance matters.

Control Your Comfort from Anywhere

Built-in Wi-Fi connectivity allows you to manage your mini split system from a compatible smartphone or tablet. Adjust temperatures, switch operating modes, create schedules, and control your comfort settings whether you're home or away.

Reliable Year-Round Heating & Cooling

Designed for dependable performance in every season, this heat pump system utilizes advanced inverter technology to deliver efficient heating and cooling. Operating on 230V power and using R454B refrigerant, it provides reliable single-zone comfort while helping maximize energy efficiency.

What's Included

Stealth DIYCOOL 18,000 BTU Single-Zone Outdoor Condenser (EZ-18Z-HP230B)

Stealth DIYCOOL 18,000 BTU Wall Mounted Indoor Air Handler (EZ-18W-HP230B)

Wireless Remote Control

Owner's Manual, Installation Guides, and Other Documentation

Recommended Accessories

30" Wall Mount Bracket for Mini Split Systems

Cielo Breeze Max Mini Split Thermostat with WiFi, SKU: BM101WA

Installation Kit

• 3/4" x 6' Electrical Whip – SKU: 84138

What buyers say

Buyers like

Quiet operation inside and out
Installation went smoothly and was easier than expected for DIY
Good product that runs well
Very quick delivery
Helpful sales staff who walked through options
Install kit had all necessities for an easier install

Buyers complain about

Trucking company failed to load the unit on its truck; customer had to pick it up at the distribution center
Issue with system heating after install (resolved without a service call)
Swing control issue: louver no longer responds to adjustment

Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V

Last price we saw

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Our take on the Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V

Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V

Last price we saw

Ask our shopping agent

Our take on the Stealth DIYCOOL 18,000 BTU 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System, 230V