The 36000 BTU this Dual Zone INVERTER mini split AC with Ceiling Cassette can cool or heat TWO separate zones (18000 BTU x 2) for a total coverage area of 1800 ft² (900 + 900 ft² areas). The Air handlers are discreetly recessed into a ceiling panel - only the grill is visible. 23 SEER Inverter technology with ENERGY STAR Certification provides the benefits of low operation temperatures, rapid cooling / heating, as well as maximum efficiency. R410A Pre-charged.


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36000 BTU AC - Heat Pump

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21000 BTU Mini Split
system back to the top
Indoor Units Indoor Unit Outdoor Unit Installation Kit
*When all air handlers are running simultaneously at full capacity, the total combined BTU output is limited to that of the outdoor condenser.
 System Includes:
  • 36,000 BTU Cooling Capacity: 18k + 18k
  • 36,000 BTU Heat Pump: 18k + 18k
  • Operates in Ambient Temps down to -13F!!
  • Wall mounted thermostat included
  • No linesets or wires included with this item.
  • Add linesets & wire using dropdown menus
  • 1 Year Part - 5 Year Compressor Warranty  >>>

    36000 BTU Dual - 23 SEER: 18k

    x 2
    Price: $2849.45   Free Shipping via AIT worldwide  
  • Select your choice of lengths for each BTU : 
  • Select to add wire
    Features back to the top
    mini split features
    Top Line Features:
    • 23 SEER - 11.30 HSPF - ENERGY STAR  Energy Star
    • Most Energy Efficient Dual-Zone Series on Market
    • Dual Air Handlers Mounts Discreetly in Ceiling
    • Dry-Mode removes moisture w/o affecting temp
    • Cross Flow Technology reduces noise output
    • Compatible with over 5 Filtration medias
    • Freon Leak Detection > Notification system
    • Low Ambient Temperature Operation (5° F)
    • Restart IC: Settings restored Following Outage
    • Follow-Me Function tracks Remote Location
    Energy Star benefits
    The particle filter or “pre-filter” removes dust and other air-borne pathogens before pushing the air through additional filtration medias and the refrigeration coil array.  This filter is washable and comes factory installed with every ductless air conditioner system.
    The open channel construction of the 3M High Air Flow (HAF) filter offers low initial airflow resistance, while its unique microstructure and electrostatic charge provides effective particle capture and retention. This translates into fewer filter change outs and reduced coil cleaning.  CLICK TO PURCHASE >>>
    The Vitamin C Filtration media releases Vitamin C into the air which softens skin and reduces stress among other therapeutic benefits.  A good choice for those wanting to add some invigoration to their indoor air environment.  Filter lasts over 2 years.  CLICK TO PURCHASE >>>
    The anti-microbial effect of silver ionic technology kills allergy causing bacteria by destroying the inner configuration elements of the cell body. The nano-silver attached to the filter screen constantly releases silver ions which directly eliminates and prohibits bacteria from replicating.  CLICK TO PURCHASE >>>
    Eliminates odors such as ammonia and deactivates harmful chemicals has such as formaldehyde.  By forming positive positions on the filter surface, Electrostatic Fiber traps small dust particles, smoke and pet dander to prevent allergic reactions and neutralize odor in the air.  CLICK TO PURCHASE >>>
    Specifications back to the top
    18000 BTU Indoor Unit specs CLICK FOR FULL SPEC SHEET
    Model Number T3-OS218-EC
    Capacity 18000 BTU
    Air Flow (Hi/M/Lo) 620/520/410 (m3/h)
    Power Supply 230 V / 60 Hz / 1Ph
    Noise Output (Hi/M/Lo) 50/47/43 dBA
    Liquid / Gas 1/4" x 1/2"
    Weight 45 lbs
    Body Dimensions (W x D x H) 25.47" x 25.47" x 2" inches
    Panel Dimensions (W x D x H) 22.44" × 22.44" × 10.24" inches
    Energy Star AHRI Energy Star
    21 SEER Toshiba Compressor
    Outdoor Unit (condenser) specs CLICK FOR FULL SPEC SHEET
    Model Number T424D-H236-C
    Compressor Brand TOSHIBA - GMCC
    Rated Capacity 27000 BTU
    Maximum Capacity 36000 BTU (12k + 12k + 12k)
    Air Flow 2130 CFM
    Power Supply 230 V / 60 Hz / 1Ph
    Max Fuse Size 35A
    SEER 23
    EER 11.50
    HSPF4 11.30
    Sound Level 63 dBA
    Operating Temp Range -13F to 122 F (cool and heat)
    Refrigerant R410A / 98.8oz Charge
    Liquid / Gas 1/4" x 3/8" (3)
    Max Lineset Length (1 zone) 82 ft
    Max Lineset Length (all zones) 148 ft
    Weight 149.9 lbs
    Dimensions (W x D x H) 37.25 × 16.14 × 34 inches
    Remote Controls back to the top
    DC Inverter Mini Split AC Heat Pump  

    DC Inverter Air Conditioners are the ultimate cooling and heating technology of the HVAC field.  They are called "DC inverter" because the alternative current (AC) is converted to Direct Current (DC) then, direct current inverted back to Alternative current with desired frequency. As known, the current supplied through the wall outlet has fixed frequency which is 60 Hertz. Different frequencies supplied to the compressor will result different running speeds of the compressor.  YMGI Inverter control systems use Pulse Amplitude Modulation (PAM) that is the most advanced and energy efficient method of inverting the current.  DC Inverter air conditioners bear special compressors that their speed could be changed by increasing or decreasing the frequency of the supplied power.  Therefore, unlike conventional split Air Contioners/Heat Pumps which cycle between on and off repeatedly, the DC Inverter control system will monitor the room temperature and adjust the compressor speed automatically.

    Conventional compressors turn on and off to maintain the room temperature at desired level.  This will result compressor to draw tremendous energy each time it starts up. This will also reduce the life-span of the compressor and other components that are turning on and off.  Once a conventional system is running, it runs at its maximum speed, consuming the maximum amount of energy in order to produce the maximum of cooling or heating to maintain the desired temperature.  The system will then cycle between on and off in an effort to maintain this temperature. When a DC Inverter compressor initially starts up, it runs with a higher speed to bring the room temperature to desired level rapidly. Once the set temperature is reached, it slows down and adjust its capacity to counter the heat loss or heat gain of the building. By this way it will maintain a constant temperature.

    Inverter Split
    Install Kit back to the top
    Wired Thermostat Controller
    Installation Overview back to the top
    BASIC OVERVIEW: The installation of a ceiling cassette is much like that of a ductless mini split with the exception that instead of a wall mounted air handler, a ceiling cassette mounts in the ceiling usually as a flush mount or in a drop ceiling. The indoor unit (ceiling cassette) and outdoor unit (condenser) are connected to each other by means of refrigerant copper tubing and electrical cables that are routed through the ceiling and outside to the condenser outputs via a 2-3 inch hole. The compressor comes pre-charged with freon however, procedures such as conducting leak tests etc. are still important steps in ensuring proper functioning of a ceiling cassette system. Click for Installation Tip *Although the installation may seem easy to some, certain tools and experience is necessary to complete installation of a ceiling cassette system.  Click to Download Installation manual.  A certified HVAC technician must conduct / complete the installation to be eligible for product warranty. (See warranty details below > ) Installation Kit
    Ceiling Cassette Diagram
    Remote Controls back to the top
    5 YEAR COMPRESSOR WARRANTY - 1 YEAR PARTS WARRANTY.  Details: Unit must be installed by a licensed HVAC (Heating, ventilating, and air conditioning) company to be eligible for product Warranty.  Damage resulting from failure to use, install or maintain the product in a manner consistent with our/manufacturer's recommendations shall render the warranty void., at its option, may request a report from a qualified technician prior to honoring a warranty claim.  We shall not be responsible for faulty installation, operation or maintenance of the product. It is the responsibility of each purchaser to determine whether the particular product is compliant with and permissible for use pursuant to the applicable rules, codes and/or regulations. if any, and suitable for particular and/or intended use and/or operation therein.  Once a non defective unit is installed by a HVAC company, chances of anything going wrong with such unit is very slim. But worst case scenario, if you come across any issues, consumer can call the company that installed the unit (usually they will cover this FREE as it falls under installation warranty).  If it was determined that the unit is not functioning due to a defect and needs to be replaced, the part will be sent free of charge.  If the compressor is defective, a BRAND NEW replacement will be shipped out. If the indoor unit is defective a BRAND NEW indoor unit will be sent out free of cost.  (labor charges incurred will not be covered under this warranty) Download Warranty Registration >
    Available Accessories back to the top
    Our Thermocore systems ship via RL Carriers or similar LTL freight service out of Oak Park, Michigan and are palletized onto a single skid.  Transit time is usually between 4 to 6 business days from payment receipt depending on where you are geographically located.  Please provide a contact phone# upon checkout (to be used for delivery purposes only).  SOMEBODY MUST BE ON SITE TO ACCEPT / SIGN FOR Order.  Failure to provide valid contact# will delay order.  System comes with Free shipping - this includes delivery to any location within the Continental United States. We will ship to Canadian locations but we need to quote separately - please contact our offices.  Additional freight for Canadian registries is usually around $150. (import and duties may apply).
      RL Carriers
    Mini Split ShippingTop
    Condenser Ground Stand

    - Provides Flat even surface
    - Avoids debris obstruction

    Price:  $73.00
    Click for more Info

    Lineset Extension (1/4 x 3/8)

    - Extend included 15 ft copper lineset to 25ft - 30ft - 40ft - 50ft
    Price:  $38.00 > $134.00
    Click for more Info

    Condenser Bracket

    - Mount your condenser at any height on an outdoor sidewall
    Price:  $46.00
    Click for more Info

    Micro-Pump II

    - Required when mounting air handler on Interior wall
    Price:  $182.00
    Click for more Info

    Electrical Wire Harness

    - 16/4 Electrical Wire Harness
    - For Extending Evap. Length

    Price:  $2.15 / ft
    Click for more Info

    Additional Remote Controls

    - Spare remote controls for the T1 Series Ductless System
    Price:  $42.00
    Click for more Info

    Filter Medias

    - Inserts into Filter Screen Slot
    - Choice of 4 Filtration Medias

    Price:  $10.00 - $14.00
    Click for more Info

    Wired Thermostat

    - Permanently Hard Mounts
    - Controls Settings w/ Remote

    Price:  $98.00
    Click for more Info

    Available Accessories back to the top
    This unit
    Swap 1-18k Mount for Suspended Ceiling: (+) $80
    Swap 2-18k Mount for Suspended Ceiling: (+) $160
    Swap 1- 18k Mount for Wall Mounted: (-) $120
    Swap 1- 18k Mount for Wall Mounted: (-) $140
    *If alternate air handler types are preferred, contact us and request invoice with preferred options. Availability fluctuates.
    Dual Zone Thermocore Mini Split, 24000 BTU AC Air Conditioner w/ Heat Pump  
    pdf files
    User Manual
    DC Inverter
    Call Thermospace at 855-382-8110
    View the Mini Split FAQ Page >
    View the Installation - Setup Diagram >
    View the Mini Split Overview Page >
    View the Mini Split Installation Tip >
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