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Choosing between a 750 sq ft vs 1250 sq ft mini split air conditioner depends on your room size and power supply. Both units offer inverter technology and heating modes for year-round comfort. They share a 19 SEER2 efficiency rating and operate quietly. The main difference lies in their cooling capacity and electrical requirements. One model targets smaller spaces with standard voltage, while the other handles larger areas but needs a higher voltage connection. Your choice should match your square footage and existing electrical setup.
Coverage Area
750 Sq. Ft.
1,250 Sq. Ft.
Cooling Capacity
12,000 BTU
18,000 BTU
Voltage
115V
230V
Heating Capacity
12,500 BTU
Not listed
Self-Cleaning
Not listed
Yes (135°F)
Weight
92 pounds
151 pounds
Choose the first if
- You need to cool a room up to 750 sq. ft.
- You have a standard 115V electrical outlet available.
- You prefer a lighter indoor unit that is easier to mount.
Choose the second if
- You need to cool a room up to 1,250 sq. ft.
- You have a 230V electrical circuit installed.
- You want a unit with self-cleaning technology to reduce maintenance.
Verdict
Select the Rellytech model if your space is smaller and you rely on standard 115V outlets. Choose the Albott model if you require more power for a larger area and have the necessary 230V wiring. Both units provide efficient heating and cooling, so your decision rests on square footage and electrical capacity.
750 vs 1250 Sq Ft Mini Split Specs
Coverage Area
Edge: Albott 18k BTU 230V Mini Split
The Rellytech 12,000 BTU 115V Mini Split covers up to 750 sq. ft., making it ideal for smaller bedrooms or offices. The Albott 18k BTU 230V Mini Split handles larger spaces, cooling up to 1,250 sq. ft. This difference stems from the Albott’s higher 18,000 BTU output compared to the Rellytech’s 12,000 BTU. If you have a large open living area or a big office, the Albott provides the necessary capacity. For smaller rooms, the Rellytech is sufficient and likely more cost-effective in installation. Choose based on your square footage needs.
Voltage Compatibility
Edge: Rellytech 12,000 BTU 115V Mini Split
Power requirements differ significantly between these two units. The Rellytech operates on a standard 115V/110V circuit, which is common in most residential homes and often does not require a dedicated heavy-duty line. The Albott requires a 208-230V connection, which is typical for larger appliances or commercial setups. If your home only has standard 115V outlets, the Rellytech is easier to install without electrical upgrades. The Albott needs a compatible high-voltage circuit. Check your electrical panel before choosing, as the Albott’s voltage requirement may limit where you can place it.
Cooling Capacity
Edge: Albott 18k BTU 230V Mini Split
The Rellytech delivers 12,000 BTU for cooling, while the Albott provides 18,000 BTU. This 50% increase in capacity allows the Albott to handle larger volumes of air more quickly. The Rellytech’s 12,500 BTU heating output is slightly higher than its cooling, offering balanced warmth. The Albott also provides robust heating for its larger coverage area. If you need rapid temperature changes in a spacious room, the Albott’s higher BTU rating is advantageous. For smaller spaces, the Rellytech’s lower output is precise and avoids overcooling.
Energy Efficiency
Edge: Tie
Both units share a 19 SEER2 rating, indicating identical energy efficiency performance per unit of cooling. The Rellytech has an HSPF2 of 8.5 for heating efficiency. The Albott’s heating efficiency rating is not listed in the provided data. Since both use inverter technology, they adjust compressor speed to maintain temperature, saving energy compared to non-inverter models. You can expect similar running costs for equivalent usage, provided the Albott is used within its 1,250 sq. ft. range and the Rellytech within its 750 sq. ft. range.
Physical Dimensions
Edge: Rellytech 12,000 BTU 115V Mini Split
Size matters for wall mounting. The Rellytech is 31.9 inches wide and 8.7 inches tall, weighing 92 pounds. It is more compact and lighter. The Albott is wider at 37.8 inches and taller at 12.4 inches, weighing 151 pounds. The Albott is significantly heavier and larger. If you have limited wall space or want a less intrusive unit, the Rellytech is the better fit. The Albott requires more clearance and a sturdier wall mount due to its weight and size. Consider your mounting location carefully.
Temperature Range
Edge: Albott 18k BTU 230V Mini Split
The Rellytech operates within a user-adjustable temperature range of 61°F to 88°F. The Albott offers a slightly wider range of 60°F to 90°F. This gives you an extra degree of flexibility on both the cool and warm ends with the Albott. The difference is minimal but might matter if you prefer cooler nights or warmer days. Both units include sleep modes to adjust temperatures gradually for comfort. The Albott’s broader range is a slight edge for extreme preference settings.
Which Mini Split Fits Your Space
Small room owners with 115V outlets
Our pick: Rellytech 12,000 BTU 115V Mini Split
The Rellytech unit covers 750 sq. ft. and runs on standard 115V power. It weighs only 92 pounds, making installation easier. You get 19 SEER2 efficiency and quiet 42dB operation. This model fits bedrooms or small offices where a lighter, lower-voltage system is required.
Large space owners needing 230V
Our pick: Albott 18k BTU 230V Mini Split
The Albott model handles 1,250 sq. ft. using 208-230V power. Its 18,000 BTU output provides stronger cooling for bigger rooms. It includes self-cleaning technology and operates in extreme temperatures. Choose this if you need higher capacity and have the necessary electrical supply installed.
Users prioritizing compact indoor dimensions
Our pick: Rellytech 12,000 BTU 115V Mini Split
The Rellytech indoor unit is narrower at 31.9 inches wide. It is also lighter at 92 pounds compared to the Albott. If your wall space is limited or you prefer a smaller visual footprint, this 12,000 BTU unit offers a more compact profile for your room.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Rellytech 12,000 BTU 115V Mini Split | 750 sq. ft. rooms on 115V power | |
| 2 | Albott 18k BTU 230V Mini Split | large rooms needing 208-230V power |
Rellytech 12,000 BTU 115V Mini Split
Best for: 750 sq. ft. rooms on 115V power
- Coverage Area
- 750 Sq. Ft.
- Cooling Capacity
- 12,000 BTU
- SEER2 Rating
- 19
- Voltage
- 115V/110V
- Operating Modes
- cooling, heating, fan, dry, ECO, Sleep
- Features
- Inverter
This Rellytech unit delivers 12,000 BTU cooling and 12,500 BTU heating for spaces up to 750 sq. ft. It runs on 115V power with a 19 SEER2 efficiency rating. The system includes four fan speeds, a 90-degree vertical swing, and operates at 42dB. You get precise temperature control between 61°F and 88°F. It fits bedrooms, offices, or garages where moderate cooling and heating are needed.
- 19 SEER2 energy efficiency rating
- Covers up to 750 sq. ft.
- Quiet 42dB operation level
- Includes ECO mode for energy savings
- Lower 12,000 BTU capacity compared to 18,000 BTU options
- Heavier 92-pound build weight
- Standard 115V voltage limit
- You need cooling for a 750 sq. ft. room
- You want a 115V plug-in unit
- You prefer quiet operation under 45dB
- You require heating for spaces over 750 sq. ft.
- You need a 230V high-power system
- You want a lighter portable unit
Verdict: Rellytech 12,000 BTU Mini Split suits you if you need efficient cooling for a single room up to 750 sq. ft. on standard 115V power. It offers quiet performance and strong energy ratings for moderate spaces.
Albott 18k BTU 230V Mini Split
Best for: large rooms needing 208-230V power
- Coverage Area
- 1,250 Sq. Ft.
- Cooling Capacity
- 18,000 BTU
- SEER2 Rating
- 19
- Voltage
- 208-230V
- Operating Modes
- Cooling, heating, dehumidifying, fan
- Room
- Offices
The Albott 18,000 BTU mini split is a ductless heat pump designed for spaces up to 1,250 square feet. It operates on 208-230V power with a 19 SEER2 rating. This unit cools and heats efficiently, handling extreme temperatures from -4°F to 140°F. It includes dehumidifying and fan modes, plus a 24-hour timer. The system features self-cleaning technology to reduce dust buildup. It suits home offices or larger rooms needing robust climate control.
- Covers up to 1,250 sq. ft. of space
- 19 SEER2 energy efficiency rating
- Operates in temperatures from -4°F to 140°F
- Includes 24-hour timer and sleep mode
- Features self-cleaning function at 135°F
- Heavier at 151 pounds compared to lighter 115V models
- Lower SEER2 rating of 19 versus 20.5 in other options
- Requires 208-230V electrical connection instead of 115V
- You need cooling for a large room up to 1,250 sq. ft.
- You have a 208-230V electrical outlet available
- You want a unit that works in extreme cold or heat
- You only have a standard 115V outlet
- You are cooling a small room under 750 sq. ft.
- You prefer a lighter unit under 100 pounds
Verdict: Albott 18,000 BTU Mini Split fits large home offices or open spaces requiring heavy-duty heating and cooling on a 208-230V circuit.
Specifications side by side
| Spec | Rellytech 12,000 BTU 115V Mini Split | Albott 18k BTU 230V Mini Split |
|---|---|---|
| Cooling Capacity | 12,000 BTU | 18,000 BTU |
| Coverage Area | up to 750 sq. ft. | Up to 1,250 sq ft |
| SEER2 Rating | 19 | 19 |
| Voltage | 115V/110V | 208-230V |
| Operating Modes | cooling, heating, fan, dry, ECO, Sleep | Cooling, heating, dehumidifying, fan |
| Room | – | Offices |
| Features | Inverter | Inverter |
| Room Type | – | Office |
| Color | White | White |
| Operating Mode | – | Heater |
| SEER Rating | 19 SEER2 | 19 SEER2 |
| Use | – | Home Office |
| Dimensions | 8.23 × 32.3 × 11.9 inches | 37.8 × 8.74 × 12.4 inches |
| Weight | 92 pounds | 151 pounds |
| Size | 12000BTU,115V,19 SEER2 | 19 SEER2, 18,000BTU 208-230V |
| Model | CE0-1 | SAC011 |
Frequently asked questions
Can I use a 750 sq ft mini split in a 1,250 sq ft room?
No. The Rellytech 12,000 BTU unit is rated for 750 sq ft. Using it in a larger space will likely result in poor cooling performance. You should select the Albott 18,000 BTU model, which covers up to 1,250 sq ft. This larger unit provides the necessary capacity for open areas or large rooms.
What voltage do I need for a 1,250 sq ft mini split?
You need a 208-230V circuit. The Albott 18k BTU unit requires 230V power to operate effectively. Standard 115V outlets are insufficient for this capacity. Ensure your electrical setup supports 230V before installation. The smaller 750 sq ft model works on standard 115V power.
Do both units offer heating capabilities?
Yes. Both the Rellytech and Albott models include heating operating modes. They use inverter technology to manage temperature efficiently. You can rely on either unit for year-round comfort. The Albott unit provides heating for larger office spaces, while the Rellytech suits smaller rooms.
How much space does the indoor unit take up?
The Rellytech unit measures 31.9 inches wide and 8.7 inches high. The Albott unit is wider at 37.8 inches and taller at 12.4 inches. Both are white. Consider your wall space when choosing. The larger Albott model requires more horizontal and vertical clearance for installation.
Is the 18,000 BTU unit heavy to install?
Yes. The Albott 18k BTU unit weighs 151 pounds. This is significantly heavier than the 92-pound Rellytech model. Heavier units may require additional support during mounting. Ensure your wall can support the weight. Professional installation is recommended for safe handling.
Are both units energy efficient?
Yes. Both units share a 19 SEER2 rating. This indicates strong energy efficiency for their respective sizes. Inverter technology helps maintain steady temperatures without wasting power. You can expect lower energy consumption in both the 750 sq ft and 1,250 sq ft models.