MRCOOL® DIY® 18K BTU 4th Gen Multi Zone OuttaSight® Ceiling Cassette with 25ft DIYPro Cable (230V/60Hz)

MODEL: DIYCASSETTE18HP-230C25

Effortless, OuttaSight® Comfort for Spaces up to 800 sq. ft.

Enjoy powerful, discreet, and whisper-quiet heating and cooling without taking up wall or floor space. The MRCOOL® DIY® 18K BTU 4th Gen Multi Zone OuttaSight® Ceiling Cassette offers energy-efficient, out-of-sight comfort from above — perfect for open-concept family rooms, large bedrooms, basements, or workspaces.

Easily recessed between standard 16″ ceiling joists, this cassette pairs with your MRCOOL® DIY® 4th Gen Multi-Zone Condenser and connects quickly using the included 25ft DIYPro™ Communication Cable and Quick Connect® pre-charged line set. No HVAC technician, no vacuuming, no gauges required.

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Why You’ll Love It

✅ Discreet Ceiling Installation — Mounts flush between standard 16″ ceiling joists for a clean, low-profile appearance.

✅ Simple DIY Setup — Compatible with MRCOOL® DIY® 4th Gen Multi-Zone systems using Quick Connect® pre-charged lines and the included 25ft DIYPro™ Communication Cable.

✅ Smart-Home Ready — Wi-Fi enabled for control via the SmartHVAC app, Amazon Alexa, or Google Assistant.

✅ Ultra-Quiet Operation — Operates between 27 and 44.5 dBA for peaceful, low-noise performance.

✅ Elevating, Washable Filter — Maintenance is easy with a reusable air filter panel that lowers up to 4.9 ft for cleaning.

✅ Year-Round Performance — Low ambient cooling to 5°F and heating up to 86°F, perfect for garages, basement living spaces, or multi-use rooms.

✅ Warranty Protection — Includes a Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor, and 5-Year Parts Warranty.

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What’s Included:

• MRCOOL® DIY® 18K BTU OuttaSight® Ceiling Cassette

• 25ft DIYPro™ Communication Cable

• Remote Control

• Installation Accessories

• MRCOOL® Warranty

Specifications

Specifications at a Glance

Attribute	Details
BTU Capacity	18,000 BTU
Voltage	208-230V
SEER	Up to 20
Coverage Area	600 – 800 sq. ft.
Sound Rating (dBA)	27 – 44.5
Wi-Fi Compatibility	Yes (SmartHVAC App, Alexa, Google Assistant)
Line Set Compatibility	MRCOOL® Quick Connect®
Cooling Operating Range	5°F – 122°F
Heating Operating Range	5°F – 86°F
Air Filter	Washable, reusable, elevating panel
Warranty	Limited Lifetime Compressor (registered), 7-Year Compressor, 5-Year Parts

Room Size & BTU Coverage Guide

Choosing the right BTU (British Thermal Unit) output ensures your space stays consistently comfortable all year round. Use this quick reference chart to match your room size with the recommended cooling and heating capacity for your MRCOOL® DIY® OuttaSight® Ceiling Cassette.

BTU Rating	Ideal Room Size (Approx.)
9,000	250 – 400 sq. ft. — ideal for standard bedrooms, home offices, or compact living rooms
12,000	400 – 600 sq. ft. — perfect for master bedrooms, mid-size living rooms, or larger offices
18,000	600 – 800 sq. ft. — great for open-concept family rooms, workshops, or finished basements

Important:

Always consider additional factors such as ceiling height, insulation quality, sun exposure, number of windows, climate, and the number of heat-producing appliances in your space when choosing the right system.

Installation

Installation & Manuals

Installation Manual

Product Brochure

Remote Control Manual

Service Manual

Warranty Document

Shipping & Returns

Shipping Policy 

At Cool Heat Direct, we offer free curbside delivery on all MRCOOL product orders via FedEx Ground, FedEx Freight, or trusted carriers depending on order size.

• Deliveries are made to the curbside — please arrange assistance for heavy or large items, as drivers do not carry items indoors or upstairs.

• Tracking details will be sent within 3–5 business days after placing your order.

• Freight shipments are scheduled directly by the carrier using the contact information you provide at checkout.

• Please inspect your shipment upon delivery and report any visible damage on the delivery receipt.

Return Policy 

We want you to love your purchase from Cool Heat Direct. If you need to return an item:

• Contact us within 30 days of delivery.

• Items must be unused, uninstalled, and in their original packaging.

• A 35% restocking fee applies to all approved returns.

• Accessories such as line sets, wall mounts, and couplers are non-returnable.

• Return shipping is the customer’s responsibility unless the item is damaged or defective on arrival.

To start a return, please email us at support@coolheatdirect.com with your order number and reason for return.