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MRCOOL® DIY® Series 5th Gen OuttaSight® 18K BTU 230V One-Way Ceiling Cassette

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High-Capacity 18K Ceiling Comfort with a Clean, Flush Finish

The MRCOOL® DIY® Series 5th Gen OuttaSight® 18K BTU One-Way Ceiling Cassette delivers dependable heating and cooling for spaces up to 800 sq. ft. while keeping walls and floors clear. It installs flush between 16" ceiling joists and connects to MRCOOL DIY systems using pre-charged Quick Connect® line sets—no vacuuming or specialized HVAC tools required.

MRCOOL® DIY® Series 5th Gen OuttaSight® 18K BTU 230V One-Way Ceiling Cassette

Important Notes

  • Designed for use with MRCOOL® DIY® multi-zone condensers only
  • Pre-charged with R-454B refrigerant

Low-profile and easy to hide

Low-profile installation that disappears into your space while delivering dependable heating and cooling.

MRCOOL DIY® OuttaSight® Ceiling Cassette - Lifestyle Photo

Key Features and Benefits

  • 18,000 BTU Heating & Cooling - Sized for larger rooms up to 800 sq. ft., including open living areas, studios, and offices.
  • Flush One-Way Ceiling Design - Fits cleanly between 16" joists (including I-joists) to maintain a modern, low-profile look.
  • DIY Installation Compatibility - Pairs with MRCOOL® DIY® Quick Connect® line sets pre-charged with R-454B, eliminating vacuum pumps and licensed HVAC requirements.
  • Quiet Operation - Designed for low sound output, suitable for bedrooms and shared spaces.
  • Flexible Control Options - Control via included remote, SmartHVAC app, or voice commands using Amazon Alexa and Google Assistant.
  • Reusable Filtration with Easy Access - Elevation function lowers the panel for straightforward filter cleaning and routine maintenance.
  • Long-Term Warranty Coverage - Backed by 5-year parts, 7-year compressor, and limited lifetime compressor warranty with registration.

System Specifications


  • Cooling Capacity (BTU): 18,000
  • Heating Capacity (BTU): 18,000
  • Voltage Requirements: 208–230
  • Phase: 1
  • Cycle: 60
  • Max Fuse Breaker (A): 15
  • Min Circuit Ampacity (A): 3
  • Rated Load: 1.2
  • Decibel Rating (dBA): 41.5
  • Decibel Rating (Low) (dBA): 26
  • Decibel Rating (High) (dBA): 44
  • CFM: 400 / 352 / 300 / 207 / 207
  • Blower Motor RPM: 1344 / 1184 / 1024
  • Filter Type: Reusable
  • Fan Only Option: Yes
  • Quiet Mode: Yes
  • Sleep Mode: Yes
  • Auto Cool: Yes
  • WiFi Compatibility: Yes
  • App Compatibility: Yes
  • Works With iOS: Yes
  • Works With Android: Yes


  • Remote Control Included: Yes
  • Registered Warranty: Limited Lifetime Compressor
  • Base Warranty: 5-Year Parts / 7-Year Compressor
  • Base Parts Warranty: 5-Year Parts
  • Registered Compressor Warranty: Limited Lifetime Compressor
  • Base Compressor Warranty: 7-Year Compressor
  • Has Batteries: Yes
  • Contains Electronics: Yes
  • Contains Chemicals: Yes
  • Contains Aerosol: Yes
  • Contains Compressed Gas: Yes
  • Proposition 65 Warning: Yes
  • Restricted States: GU; PR; VI
  • Net Depth (in): 13.19
  • Net Height (in): 8.98
  • Net Width (in): 50.31
  • Net Weight (lbs): 45
  • Gross Depth (in): 22.48
  • Gross Height (in): 22.64
  • Gross Width (in): 57.60
  • Gross Weight (lbs): 88


MRCOOL DIY® OuttaSight® Ceiling Cassette - Room setup

Frequently Asked Questions

Can this ceiling cassette be used in a single-zone system?

Yes. It is compatible with both single-zone and multi-zone MRCOOL DIY 5th Gen systems when paired with a compatible condenser.

Is professional installation required?

No. When used with MRCOOL DIY Quick Connect® line sets, installation does not require vacuuming or specialized HVAC tools.

What room size is the 18K OuttaSight cassette designed for?

It is rated for spaces up to 800 square feet, depending on insulation and layout.

How can the unit be controlled?

It includes a wireless remote and supports app-based and voice control through Alexa and Google Assistant.

Best Price Guarantee

You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower! 

We love to chat! Give us a call and we'll see what we can do to get you the best deal!

Conditions of our 100% Price Match Guarantee:

  • Contact us to discuss the Price Match so we can look up the competitors price

  • Buy one, get one free offers and Rebates are not eligible

  • The item must be in stock on the competitors website

  • The competitor must be an online store, not a retail location

  • The website can't be a discounter or auction website ( such as eBay, overstock, etc.)

  • The company must be an Authorized Retailer of the product in question

  • The Price Match Guarantee is based on the final price of the product including shipping and taxes

Why Buy From Wild Oak Trail? 

We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.

We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!

We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.

Thanks for supporting our family and being part of the Wild Oak Trail community!

Description

High-Capacity 18K Ceiling Comfort with a Clean, Flush Finish

The MRCOOL® DIY® Series 5th Gen OuttaSight® 18K BTU One-Way Ceiling Cassette delivers dependable heating and cooling for spaces up to 800 sq. ft. while keeping walls and floors clear. It installs flush between 16" ceiling joists and connects to MRCOOL DIY systems using pre-charged Quick Connect® line sets—no vacuuming or specialized HVAC tools required.

MRCOOL® DIY® Series 5th Gen OuttaSight® 18K BTU 230V One-Way Ceiling Cassette

Important Notes

  • Designed for use with MRCOOL® DIY® multi-zone condensers only
  • Pre-charged with R-454B refrigerant

Low-profile and easy to hide

Low-profile installation that disappears into your space while delivering dependable heating and cooling.

MRCOOL DIY® OuttaSight® Ceiling Cassette - Lifestyle Photo

Key Features and Benefits

  • 18,000 BTU Heating & Cooling - Sized for larger rooms up to 800 sq. ft., including open living areas, studios, and offices.
  • Flush One-Way Ceiling Design - Fits cleanly between 16" joists (including I-joists) to maintain a modern, low-profile look.
  • DIY Installation Compatibility - Pairs with MRCOOL® DIY® Quick Connect® line sets pre-charged with R-454B, eliminating vacuum pumps and licensed HVAC requirements.
  • Quiet Operation - Designed for low sound output, suitable for bedrooms and shared spaces.
  • Flexible Control Options - Control via included remote, SmartHVAC app, or voice commands using Amazon Alexa and Google Assistant.
  • Reusable Filtration with Easy Access - Elevation function lowers the panel for straightforward filter cleaning and routine maintenance.
  • Long-Term Warranty Coverage - Backed by 5-year parts, 7-year compressor, and limited lifetime compressor warranty with registration.

System Specifications


  • Cooling Capacity (BTU): 18,000
  • Heating Capacity (BTU): 18,000
  • Voltage Requirements: 208–230
  • Phase: 1
  • Cycle: 60
  • Max Fuse Breaker (A): 15
  • Min Circuit Ampacity (A): 3
  • Rated Load: 1.2
  • Decibel Rating (dBA): 41.5
  • Decibel Rating (Low) (dBA): 26
  • Decibel Rating (High) (dBA): 44
  • CFM: 400 / 352 / 300 / 207 / 207
  • Blower Motor RPM: 1344 / 1184 / 1024
  • Filter Type: Reusable
  • Fan Only Option: Yes
  • Quiet Mode: Yes
  • Sleep Mode: Yes
  • Auto Cool: Yes
  • WiFi Compatibility: Yes
  • App Compatibility: Yes
  • Works With iOS: Yes
  • Works With Android: Yes


  • Remote Control Included: Yes
  • Registered Warranty: Limited Lifetime Compressor
  • Base Warranty: 5-Year Parts / 7-Year Compressor
  • Base Parts Warranty: 5-Year Parts
  • Registered Compressor Warranty: Limited Lifetime Compressor
  • Base Compressor Warranty: 7-Year Compressor
  • Has Batteries: Yes
  • Contains Electronics: Yes
  • Contains Chemicals: Yes
  • Contains Aerosol: Yes
  • Contains Compressed Gas: Yes
  • Proposition 65 Warning: Yes
  • Restricted States: GU; PR; VI
  • Net Depth (in): 13.19
  • Net Height (in): 8.98
  • Net Width (in): 50.31
  • Net Weight (lbs): 45
  • Gross Depth (in): 22.48
  • Gross Height (in): 22.64
  • Gross Width (in): 57.60
  • Gross Weight (lbs): 88


MRCOOL DIY® OuttaSight® Ceiling Cassette - Room setup

Frequently Asked Questions

Can this ceiling cassette be used in a single-zone system?

Yes. It is compatible with both single-zone and multi-zone MRCOOL DIY 5th Gen systems when paired with a compatible condenser.

Is professional installation required?

No. When used with MRCOOL DIY Quick Connect® line sets, installation does not require vacuuming or specialized HVAC tools.

What room size is the 18K OuttaSight cassette designed for?

It is rated for spaces up to 800 square feet, depending on insulation and layout.

How can the unit be controlled?

It includes a wireless remote and supports app-based and voice control through Alexa and Google Assistant.

Best Price Guarantee!

Best Price Guarantee

You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower! 

We love to chat! Give us a call and we'll see what we can do to get you the best deal!

Conditions of our 100% Price Match Guarantee:

  • Contact us to discuss the Price Match so we can look up the competitors price

  • Buy one, get one free offers and Rebates are not eligible

  • The item must be in stock on the competitors website

  • The competitor must be an online store, not a retail location

  • The website can't be a discounter or auction website ( such as eBay, overstock, etc.)

  • The company must be an Authorized Retailer of the product in question

  • The Price Match Guarantee is based on the final price of the product including shipping and taxes

Why Buy From Us

Why Buy From Wild Oak Trail? 

We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.

We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!

We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.

Thanks for supporting our family and being part of the Wild Oak Trail community!