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Introducing the all-new Daizuki 18000 Btu Ductless Mini Split AC, your ultimate solution for year-round comfort! This powerful 1.5 Ton Heat Pump is designed to efficiently heat and cool your space, even in temperatures as low as -4 F. With cutting-edge DC Inverter Technology, the Daizuki AC ensures optimal performance while minimizing energy consumption. This ductless air conditioner package includes a sleek wall mount indoor unit complete with a remote and Wi-Fi smart app, plus an outdoor unit with a 10' install kit. Enjoy features like auto restart, vertical auto swing, sleep mode, eco mode, and a turbo function for those hot summer days. The BlueFin plated coils add durability, making this unit a reliable choice for your home.
The ALL NEW DXTHA-21 Series by Daizuki. Daizuki has been an ever-reliable company in the HVAC industry, producing some of the most dependable ductless mini-split systems on the market. This DXTHA-21 Series is one of the most affordable models Daizuki has produced to date, delivering budget-friendly year-round comfort.
This system operates down to -4°F outdoor ambient, though it operates at reduced capacity in extreme cold: approximately 85% capacity at 20°F and 50% capacity at -4°F. For milder winter climates, this is a reliable primary heat source. For extreme cold climates that regularly drop below 0°F, consider a Hyper Heat model rated for 100% capacity at those temperatures. The indoor unit includes built-in WiFi for app control, I FEEL (senses temperature at the remote), Auto Clean, Louver Position Memory, and a 4-step air purification system. The outdoor unit features BlueFin corrosion protection and a full DC inverter.
| Technical Specifications | |
|---|---|
| System Type | Single-Zone Wall Mount Mini Split Heat Pump (DXTHA-21 Series) |
| Capacity | 18,000 BTU (1.5 Ton) |
| Outdoor Unit | DXTH18C626A-21 |
| Indoor Unit | DXTH18E626A-21 |
| SEER2 Rating | 21 |
| EER Rating | 11.6 |
| HSPF Rating | 9 |
| Refrigerant | R32 (Low-GWP) |
| Voltage | 208/230V, Single Phase |
| Min Heating Temperature | -4°F (50% capacity) |
| Heating Capacity at 20°F | 85% of rated capacity |
| Min Cooling Temperature | 57°F |
| Line Set | 10' install kit included |
| WiFi | Built-in — Daizuki app for iOS & Android |
| Controls Included | Remote control |
| Airflow | Vertical auto-swing, louver position memory |
| Indoor Features | I FEEL (remote sensor), 4-Step Air Purification, Auto Clean, Sleep Mode, 24hr Timer |
| Outdoor Features | Full DC Inverter, BlueFin Coil Protection, Auto Restart |
| AHRI Certified | Yes |
| ETL Listed | Yes |
| Installation Type | Wall Mount Ductless (Single Zone) |
| Warranty | 5yr Compressor / 2yr Parts (Registration Required within 60 days) |
| Warranty Registration | Register Your System |
Operates the equipment even more efficiently by modulating compressor output in real time — helps minimize energy consumption and maintains consistent temperatures.
Connect your air conditioning unit to your smartphone or tablet via the Daizuki app — control your mini split remotely from anywhere.
BlueFin Technology provides coil protection against corrosion in environments where traditional coatings fail — extends coil life in coastal or humid areas.
Oxidized ions are diffused into the air through the coil system, colliding with bacteria and viruses to inactivate their protein structures and counter airborne toxins.
Senses the temperature at the location of the remote control — personalized comfort wherever you sit, not just where the indoor unit is mounted.
Auto Clean dries the coil after cooling to inhibit mold. Louver Position Memory returns the louver to its last position on power-on.
Vertical auto-swing distributes conditioned air up and down the room — eliminates hot and cold spots in larger spaces.
Turbo accelerates heating or cooling. Eco minimizes electrical consumption. Sleep adjusts for nighttime comfort and energy savings.
No weight limits. No dimensional charges. Free freight delivery on every order.
Every unit ships with the full manufacturer warranty — no third-party coverage needed.
We cut out the middleman. Compare us against any competitor — we back our pricing.
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Call or email our team. We answer specs, sizing, and installation questions — not scripts.
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*Warranty registration REQUIRED within 60 days of installation — Register Your System.
No. This is a traditional line-set system — brazing, evacuation and charging the refrigerant circuit must be performed by an EPA 608-certified technician. The Daizuki warranty also depends on professional installation and online registration within 60 days of installation via the link in the warranty section above. Our team can answer sizing and line-set questions before you order — just call or email.
A wall mount mini split is a ductless indoor unit that installs high on a wall, above furniture and away from foot traffic. It's the most common mini split form factor — ideal for bedrooms, home offices, living rooms, additions, and single-room commercial spaces. At 18,000 BTU, this system is sized for roughly 500–750 sq ft depending on ceiling height, insulation, and climate.
Yes — a 10-foot install kit is included with the outdoor unit. Note that 10' is shorter than most standard line sets (typically 15' or 25'). If your installation requires a longer run, verify with Daizuki before extending — line-set length affects refrigerant charge.
The Daizuki DXTHA-21 Series carries a 5-year compressor / 2-year parts warranty. Registration is required within 60 days of installation to activate coverage. The Warranty Terms PDF linked above covers the full terms. Registration is done online at the link in the warranty section above.
Yes. At 20°F outdoor ambient, this system delivers approximately 85% of its rated heating capacity. At -4°F it delivers approximately 50% of its rated heating capacity. This means it can operate down to -4°F, but it's not a full-capacity cold-climate system like a Hyper Heat model. For climates that regularly see single-digit or negative temperatures, consider a Hyper Heat model rated for 100% capacity at those temps. For milder winter climates, this system works as a reliable primary heat source.
| Title | Daizuki 18K-Btu 21 SEER2 Mini Split Heat Pump AC (-4Β°F) 11.6 EER/9 HSPF (R32) |
|---|---|
| Brand | Daizuki |
| Category | 18000 Btu | 1.5 Ton | 600-800 Sq Ft |
| SKU | DXTH18C626A-21/DXTH18E626A-21 |
| Condition | new |
| UPC | 893088008088 |
| MPN | DXTH18C626A-21 |
Usually, "DIY-friendly" means "cheaply made," but this Daizuki 18k BTU is the exception. It looks like a high-end designer appliance on the wallβsleek, minimalist, and surprisingly sturdy. If you want a premium, professional-grade atmosphere without the contractor-grade price tag, this is it. It cooled my entire main floor in minutes and looks stunning doing it.
Usually, "DIY-friendly" means "cheaply made," but this Daizuki 18k BTU is the exception. It looks like a high-end designer appliance on the wallβsleek, minimalist, and surprisingly sturdy. If you want a premium, professional-grade atmosphere without the contractor-grade price tag, this is it. It cooled my entire main floor in minutes and looks stunning doing it.
George McKibben · 2026-02-13
Mini Split Warehouse offers a wide selection of ductless air conditioners and split heat pumps, providing free shipping nationwide.
(877) 770-3548
