FrosthubUSA is a specialized HVAC brand owned and operated by Interactive Group LLC, a registered United States corporation. Our journey began in 2018 with a clear and passionate mission: to transform the e-commerce landscape by providing unmatched customer service and accessible, high-quality cooling solutions. Previously known as Cool Mini-Splits, our brand has grown into a trusted name for homeowners and businesses nationwide. We specialize exclusively in MRCOOL products, serving as an authorized online distributor.
Our Global Operations
To provide exceptional support and maintain a highly efficient Direct-to-Consumer (DTC) retail model, we embrace a modern, global workforce. While our parent company, Interactive Group LLC, is legally registered in Delaware, USA, our dedicated e-commerce operations, web management, and customer service teams operate from our headquarters in Da Nang, Vietnam. This specialized international setup allows us to manage our digital storefront effectively and provide dedicated, expert technical insights to help you navigate our carefully selected range of multizone and single-zone systems.
US-Based Logistics & Shipping
While our support team operates globally, 100% of our physical inventory is warehoused and shipped domestically within the United States. We dispatch high-value climate control systems directly to your door from manufacturer-authorized fulfillment centers, primarily our logistics hub in Kentucky. This guarantees rapid delivery across the contiguous 48 states, factory-certified handling, and ensures that every unit is authentic and carries a full manufacturer's warranty.
Transparency & Returns
At the heart of FrosthubUSA is a culture of transparency and respect. Because our daily operations are managed overseas and our Delaware corporate address serves strictly for legal registry, we do not operate a traditional physical retail storefront for walk-ins. Consequently, all physical merchandise returns are handled exclusively at our specialized US logistics hubs. Returns are strictly processed following an approved Return Merchandise Authorization (RMA) to ensure professional standards and the premium quality of service we deliver every day.
Product Description
Spec. & Dimensions
Sizing Guide
Warranty & Manuals
The MrCool DIY 3 Zone Mini Split featuring a 9K-12K-18K configuration is a versatile system ideal for a master suite and 2 standard rooms. Featuring the maximum capacity 55k condenser, this industrial grade residential unit ensures peak performance even in extreme temperatures for large properties.
Optimized for single story homes or targeted floor coverage, this three zone system ensures you stop wasting energy on empty rooms. It grants independent control to your most used spaces, keeping living areas cool and bedrooms comfortable without the waste of a central unit.
Every home layout is different, which is why this system moves beyond standard piping. Select the exact pre charged Quick Connect line set length you need for each indoor unit directly from the menu above. Available in 16ft, 25ft, 35ft, 50ft, 66ft, and 75ft options, our custom selection ensures you do not pay for excess copper or struggle with lines that are too short.
What is Included:
1x 55k Outdoor Condenser
3x Indoor Ceiling Cassettes
3x Remote Controls and WiFi Dongles
3x Selected Line Sets (Your Custom Lengths)
3x Communication Wire & Drain Hose
Delivery Note: This item ships via LTL Freight. The carrier will call to schedule a curbside delivery appointment.
The size of your room is the main factor in choosing the right unit. MRCOOL DIY 4th Gen comes in various sizes, each designed to cool and heat specific square footage ranges.
Here's a quick reference for choosing the right BTU based on your room size:
6,000 BTU covers up to 250 square feet
9,000 BTU covers up to 350 square feet.
12,000 BTU covers up to 550 square feet.
18,000 BTU covers up to 800 square feet.
24,000 BTU covers up to 1,050 square feet.
36,000 BTU covers up to 1,500 square feet.
How BTU Limits Work in Your Mini-Split System
You can opt for high BTU air handlers for strong heating and cooling. But, if you plan to run multiple air handlers at the same time, consider the main unit's (condenser) maximum power.
Here’s the deal: Suppose your condenser can handle 18,000 BTU, and you have two indoor air handlers, each at 12,000 BTU. If both run simultaneously, they’ll automatically adjust to 9,000 BTU each to match the condenser's limit. This ensures the system runs safely.
If you usually run one air handler at a time, a lower BTU condenser might be sufficient. But if you plan to use all air handlers together, a higher BTU condenser is the way to go. This lets you enjoy the full power of each air handler without overloading the system.
By considering these factors, you can ensure your MRCOOL DIY 4th Gen unit is perfectly sized for your needs, keeping you comfortable year-round.
For personalized assistance or further clarification, please feel free to contact our customer support via chat or call. Our team is ready to help you make the best choice for your cooling needs.
DIY Multi-Zone Manuals
MRCOOL DIY Mini Splits Warranty
MRCOOL distributor (hereinafter “Company”) warrants this product against failure due to defects in materials or workmanship under normal use and maintenance as follows:
Standard Warranty: 5-year parts warranty and 7-year compressor warranty.
Limited Lifetime Compressor Warranty: Available if specific conditions are met.
Conditions for Limited Lifetime Compressor Warranty:
Registration: The unit must be registered at the following web address: https://mrcool.com/warranty within 60 days of the installation date.
MrCool Care Program Enrollment: The original, registered owner must enroll in the MrCool Care program within 4 months from the installation date. This program requires a biannual fee and includes a DIY cleaning kit for regular maintenance.
Regular Maintenance: The unit must be cleaned biannually using the MrCool Care kit as part of the preventative maintenance to ensure proper function throughout its lifespan.
Coverage Details:
Within the First 7 Years: If compressor failure occurs, verified by diagnostic testing performed by a certified HVAC technician, the warranty provides one entire unit replacement (equipment only).
After 7 Years: The limited lifetime compressor warranty covers the cost of a replacement compressor (equipment only).
Important Notes:
The warranty does not cover any costs incurred for diagnosis or replacement of equipment.
If the original owner does not register the unit, the warranty defaults to the standard 5-year parts and 7-year compressor warranty.
The MrCool DIY 3 Zone Mini Split featuring a 9K-12K-18K configuration is a versatile system ideal for a master suite and 2 standard rooms. Featuring the maximum capacity 55k condenser, this industrial grade residential unit ensures peak performance even in extreme temperatures for large properties.
Optimized for single story homes or targeted floor coverage, this three zone system ensures you stop wasting energy on empty rooms. It grants independent control to your most used spaces, keeping living areas cool and bedrooms comfortable without the waste of a central unit.
Every home layout is different, which is why this system moves beyond standard piping. Select the exact pre charged Quick Connect line set length you need for each indoor unit directly from the menu above. Available in 16ft, 25ft, 35ft, 50ft, 66ft, and 75ft options, our custom selection ensures you do not pay for excess copper or struggle with lines that are too short.
What is Included:
1x 55k Outdoor Condenser
3x Indoor Ceiling Cassettes
3x Remote Controls and WiFi Dongles
3x Selected Line Sets (Your Custom Lengths)
3x Communication Wire & Drain Hose
Delivery Note: This item ships via LTL Freight. The carrier will call to schedule a curbside delivery appointment.
The size of your room is the main factor in choosing the right unit. MRCOOL DIY 4th Gen comes in various sizes, each designed to cool and heat specific square footage ranges.
Here's a quick reference for choosing the right BTU based on your room size:
6,000 BTU covers up to 250 square feet
9,000 BTU covers up to 350 square feet.
12,000 BTU covers up to 550 square feet.
18,000 BTU covers up to 800 square feet.
24,000 BTU covers up to 1,050 square feet.
36,000 BTU covers up to 1,500 square feet.
How BTU Limits Work in Your Mini-Split System
You can opt for high BTU air handlers for strong heating and cooling. But, if you plan to run multiple air handlers at the same time, consider the main unit's (condenser) maximum power.
Here’s the deal: Suppose your condenser can handle 18,000 BTU, and you have two indoor air handlers, each at 12,000 BTU. If both run simultaneously, they’ll automatically adjust to 9,000 BTU each to match the condenser's limit. This ensures the system runs safely.
If you usually run one air handler at a time, a lower BTU condenser might be sufficient. But if you plan to use all air handlers together, a higher BTU condenser is the way to go. This lets you enjoy the full power of each air handler without overloading the system.
By considering these factors, you can ensure your MRCOOL DIY 4th Gen unit is perfectly sized for your needs, keeping you comfortable year-round.
For personalized assistance or further clarification, please feel free to contact our customer support via chat or call. Our team is ready to help you make the best choice for your cooling needs.
DIY Multi-Zone Manuals
MRCOOL DIY Mini Splits Warranty
MRCOOL distributor (hereinafter “Company”) warrants this product against failure due to defects in materials or workmanship under normal use and maintenance as follows:
Standard Warranty: 5-year parts warranty and 7-year compressor warranty.
Limited Lifetime Compressor Warranty: Available if specific conditions are met.
Conditions for Limited Lifetime Compressor Warranty:
Registration: The unit must be registered at the following web address: https://mrcool.com/warranty within 60 days of the installation date.
MrCool Care Program Enrollment: The original, registered owner must enroll in the MrCool Care program within 4 months from the installation date. This program requires a biannual fee and includes a DIY cleaning kit for regular maintenance.
Regular Maintenance: The unit must be cleaned biannually using the MrCool Care kit as part of the preventative maintenance to ensure proper function throughout its lifespan.
Coverage Details:
Within the First 7 Years: If compressor failure occurs, verified by diagnostic testing performed by a certified HVAC technician, the warranty provides one entire unit replacement (equipment only).
After 7 Years: The limited lifetime compressor warranty covers the cost of a replacement compressor (equipment only).
Important Notes:
The warranty does not cover any costs incurred for diagnosis or replacement of equipment.
If the original owner does not register the unit, the warranty defaults to the standard 5-year parts and 7-year compressor warranty.
