TOSOT TSTMZC18D99 Cosmo Smart Dual Zone Heat Pump Mini Split Air Conditioner System with 18,000 (9K+9K) BTU, 900 sq. ft. Cooling Area, Energy Star (230 Volts)
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TOSOT TSTMZC18D99 Features
18,000 BTU Dual Zone Mini Split Air Conditioner - Heat Pump
- Energy Star certified: Rated at 21 SEER2 and COP 13
- Noise level: 24-41dB
- Works in harsh conditions (-22°F to 118°F)
- WiFi control
- All accessories included. Lineset standard size 16ft.
- R32 refrigerant
- 5-year warranty
Save 50% on Energy Use
Energy Star Certified for Superior Efficiency
Tested by AHRI and Energy Star, this 21 SEER2-rated system can save you up to 50% on energy bills compared to units rated at 10 SEER2.
Eligible for up to $2,000 in tax credits.
High-Efficiency DC Inverter
Advanced Technology for Rapid and Stable Comfort
With over 30 years of HVAC expertise, TOSOT understands the importance of durability and energy efficiency.
The patented high-frequency inverter DC compressor cools and heats rooms quickly and operates quietly without frequent on-off cycling.
Efficient Climate Control for Every Season
Perfect for Large Houses
Get reliable heating and cooling for up to 900 sq. ft. Our system boasts 21 SEER2 and COP 13 ratings, ensuring energy-efficient comfort throughout the year.
Works in Harsh Conditions
Climate Solution for Any Region
This model performs exceptionally well year-round in hot southern states like Arizona or cold northern regions like Michigan, even under extreme heat (118°F) and ultra-cold (-22°F) weather conditions.
During extended winter trips, the 45°F(8°C) heating function prevents freezing pipes while maintaining low energy costs.
Blue Fin Technology
- Heat Exchanger - The blue aluminum fin features an anti-corrosion coating. Its super hydrophilic performance boosts heat exchanging efficiency by 40%, saving energy compared to non-Blue Fin models
- Durable Outdoor Unit - Corrosion-resistant and treated for high resistance to rust and salty air, the unit ensures long-lasting performance.
Intelligent Defrosting
TOSOT's intelligent defrosting technology accurately detects the frosting status of an outdoor unit using temperature sensors.
It then smartly adjusts the defrosting process according to the actual conditions, enhancing heating efficiency and ensuring room comfort.
Whisper-Quiet Indoor Comfort
Powerful Yet Tranquil
The noise level of the indoor unit is only 24-41 dB, bringing you closer to complete quietness while keeping the noise of the compressor entirely out of your room.
WiFi Control
Control your device using the Gree+ app or voice commands using Alexa or Google Home.
4 Modes, 1 Unit
Powerful cooling, heating, fan, and dehumidifying functions all in one unit.
5-Year Manufacturer Warranty
Both the Compressor and the Parts
The Free Match multi-zone system comes with a standard 5-year warranty for both the compressor and parts. Our professional support team will assess your case and either cover your repair costs or provide free replacement parts, depending on the situation.
TOSOT TSTMZC18D99 Specifications
| Width | |
| Indoor Unit Width | 32 9/10" |
| Outdoor Unit Width | 32 2/5" |
| Depth | |
| Indoor Unit Depth | 7 9/10" |
| Outdoor Unit Depth | 13 9/10" |
| Height | |
| Indoor Unit Height | 10 4/5" |
| Outdoor Unit Height | 21 7/10" |
TOSOT TSTMZC18D99 Overview
18,000 BTU Dual Zone Mini Split Air Conditioner - Heat Pump
- Energy Star certified: Rated at 21 SEER2 and COP 13
- Noise level: 24-41dB
- Works in harsh conditions (-22°F to 118°F)
- WiFi control
- All accessories included. Lineset standard size 16ft.
- R32 refrigerant
- 5-year warranty
Save 50% on Energy Use
Energy Star Certified for Superior Efficiency
Tested by AHRI and Energy Star, this 21 SEER2-rated system can save you up to 50% on energy bills compared to units rated at 10 SEER2.
Eligible for up to $2,000 in tax credits.
High-Efficiency DC Inverter
Advanced Technology for Rapid and Stable Comfort
With over 30 years of HVAC expertise, TOSOT understands the importance of durability and energy efficiency.
The patented high-frequency inverter DC compressor cools and heats rooms quickly and operates quietly without frequent on-off cycling.
Efficient Climate Control for Every Season
Perfect for Large Houses
Get reliable heating and cooling for up to 900 sq. ft. Our system boasts 21 SEER2 and COP 13 ratings, ensuring energy-efficient comfort throughout the year.
Works in Harsh Conditions
Climate Solution for Any Region
This model performs exceptionally well year-round in hot southern states like Arizona or cold northern regions like Michigan, even under extreme heat (118°F) and ultra-cold (-22°F) weather conditions.
During extended winter trips, the 45°F(8°C) heating function prevents freezing pipes while maintaining low energy costs.
Blue Fin Technology
- Heat Exchanger - The blue aluminum fin features an anti-corrosion coating. Its super hydrophilic performance boosts heat exchanging efficiency by 40%, saving energy compared to non-Blue Fin models
- Durable Outdoor Unit - Corrosion-resistant and treated for high resistance to rust and salty air, the unit ensures long-lasting performance.
Intelligent Defrosting
TOSOT's intelligent defrosting technology accurately detects the frosting status of an outdoor unit using temperature sensors.
It then smartly adjusts the defrosting process according to the actual conditions, enhancing heating efficiency and ensuring room comfort.
Whisper-Quiet Indoor Comfort
Powerful Yet Tranquil
The noise level of the indoor unit is only 24-41 dB, bringing you closer to complete quietness while keeping the noise of the compressor entirely out of your room.
WiFi Control
Control your device using the Gree+ app or voice commands using Alexa or Google Home.
4 Modes, 1 Unit
Powerful cooling, heating, fan, and dehumidifying functions all in one unit.
5-Year Manufacturer Warranty
Both the Compressor and the Parts
The Free Match multi-zone system comes with a standard 5-year warranty for both the compressor and parts. Our professional support team will assess your case and either cover your repair costs or provide free replacement parts, depending on the situation.
TOSOT TSTMZC18D99 Specifications
| Width | |
| Indoor Unit Width | 32 9/10" |
| Outdoor Unit Width | 32 2/5" |
| Depth | |
| Indoor Unit Depth | 7 9/10" |
| Outdoor Unit Depth | 13 9/10" |
| Height | |
| Indoor Unit Height | 10 4/5" |
| Outdoor Unit Height | 21 7/10" |
TOSOT TSTMZC18D99 Warranty & Returns
Warranty Information
Limited 5 Year Parts
Return Policy
Returns accepted within 30 days of delivery. Item must be in original packaging and unused condition.
TOSOT TSTMZC18D99 Why Us
Flexible Monthly Financing with Affirm
Split your purchase into easy payments over time—interest-free or with simple interest depending on your plan and eligibility.
Get Free In-Home Delivery on Orders $799+
We offer free in-home delivery to most serviceable zip codes for orders over $799.
Membership Club
Free Standard Installation
Free 1 Year Extended Warranty
Bonus Rewards
3 Level Rebate
Manufacturer rebates, instant savings, and product discounts — all in one place.
Customize your Coverage
Choose a 3- or 5-year protection plan—get 50% back if you don't use it.
Price Match Guarantee
If you find a lower price on an identical item from a local competitor or select online retailers, we will match it.