Just In｜MRCOOL® DIY 5th Gen Multi-Zone 4-Zone 48,000 BTU 21.8 SEER2 (6K + 6K + 9K + 18K) 3x 16ft + 1x 25ft line sets, Ductless Mini-Split Heat Pump System – Model DIYM448HPW03D216

Product Description 
Model: DIYM448HPW03D216
 
MRCOOL DIY 5th Gen Multi-Zone 4-Zone 48,000 BTU Ductless Mini-Split System — Model DIYM448HPW03D216
The MRCOOL® DIYM448HPW03D216 is a high-capacity, professionally balanced 4-zone ductless mini-split system designed for homeowners who want true zone control, long-term efficiency, and DIY installation convenience—without sacrificing performance or warranty protection.
 
This system is powered by the MRCOOL® DIY® 5th Generation 48,000 BTU multi-zone condenser and paired with a smart indoor configuration of two 6,000 BTU air handlers, one 9,000 BTU air handler, and one 18,000 BTU air handler. This layout allows you to properly size each room based on real heat load, making it ideal for bedrooms, offices, nurseries, guest rooms, bonus rooms, and larger living spaces—all operating independently from one outdoor unit.
 
Installation is simplified using MRCOOL®’s patented DIY® QuickConnect® technology. This bundle includes long-reach 25-ft pre-charged DIY® QuickConnect® line sets, factory sealed with R-454B refrigerant, eliminating the need for vacuum pumps, gauges, or licensed refrigerant handling. The included DIYPRO® communication cable removes the need for electrical conduit, reducing labor time while improving durability and reliability.
 
With DC inverter technology, Gold Fin® corrosion-resistant coils, Follow Me® temperature sensing, and full MRCOOL® Smart HVAC Controller® App integration, this system delivers quiet operation, lower energy bills, and dependable year-round comfort—all with true DIY convenience.
 
KEY FEATURES & PERFORMANCE HIGHLIGHTS 

48,000 BTU total system capacity
4 independently controlled comfort zones
(2) 6K + (1) 9K + (1) 18K BTU indoor air handlers
Up to 21.8 SEER2 high-efficiency rating
DC inverter variable-speed compressor
DIY® QuickConnect® pre-charged line sets
Extended 25-ft line-set reach for flexible layouts
DIYPRO® cable (no conduit required)
Gold Fin® anti-corrosion protection
Follow Me® temperature sensing
MRCOOL® Smart HVAC Controller® App
Amazon Alexa® & Google Home® compatibility
AHRI certified

 
ELECTRICAL REQUIREMENTS & BREAKER INFORMATION 
Outdoor Condenser — DIY-MULTI6-48HP230D-O

Voltage: 208 / 230V
Phase: Single-Phase
Frequency: 60 Hz
Minimum Circuit Ampacity (MCA): 40 Amps
Maximum Breaker Size: 45 Amps
Dedicated Circuit Required: Yes

 
DIMENSIONS & WEIGHT
 Outdoor Condenser

Width: 37.48 in
Height: 52.48 in
Depth: 16.34 in

Net Weight: ~224 lbs 

6K Indoor Air Handlers (each)

Width: 31.57 in
Height: 11.69 in
Depth: 7.44 in
Weight: ~24.5 lbs

9K Indoor Air Handler

Width: 31.57 in
Height: 11.69 in
Depth: 7.44 in

Weight: ~25 lbs 

18K Indoor Air Handler

Width: 39.37 in
Height: 12.99 in
Depth: 8.90 in
Weight: ~32 lbs

 
WARRANTY COVERAGE

5-Year Parts Warranty
7-Year Compressor Warranty

Eligible for the MRCOOL® Care Kit Program

 
WHAT’S INCLUDED IN THIS BUNDLE

✔ MRCOOL® DIY® 48,000 BTU Multi-Zone Outdoor Condenser
✔ (2) 6,000 BTU Wall-Mounted Indoor Air Handlers
✔ (1) 9,000 BTU Wall-Mounted Indoor Air Handler
✔ (1) 18,000 BTU Wall-Mounted Indoor Air Handler
✔ (3) 25-ft DIY® QuickConnect® Line Sets (¼″ × ⅜″)
✔ (1) 25-ft DIY® QuickConnect® Line Set (¼″ × ½″)
✔ DIYPRO® communication cable
✔ Wireless remotes for each indoor unit
✔ Installation manuals & mounting hardware

Smart phone not included.
 
FREQUENTLY ASKED QUESTIONS (FAQ) 
Why choose 25-ft line sets instead of 16-ft?
They allow greater condenser placement flexibility for larger homes, garages, basements, or multi-story layouts.
 
Can each zone be controlled independently?
Yes. Each indoor unit operates with its own temperature, fan speed, and mode settings.
 
Is professional HVAC installation required?
No. This system is designed for true DIY installation—no refrigerant handling required.
 
Does this system support smart home control?
Yes. Fully compatible with Alexa®, Google Home®, and the MRCOOL® Smart HVAC Controller® App.
 
Is this system suitable for long-term daily use?
Absolutely. The DC inverter compressor adjusts output automatically to reduce energy usage and wear.
 
 
Why Buy From MRCOOL DIRECT?
When you order from MRCOOL Direct, you get:

✅ Authorized MRCOOL® dealer – Your warranty is protected
✅ Factory-fresh units – No refurbished or mystery sources
✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
✅ Financing options – Make high-efficiency comfort more affordable
✅ Real product support – Help with sizing, line set selection, and DIY questions
✅ No third-party marketplace middlemen – Just genuine MRCOOL® systems from a trusted MRCOOL® dealer.

BUY DIRECT!
Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC615-553-8118
Family owned & USAs #1 MRCOOL® Authentication Dealer.
Buying from MRCOOL DIRECT means accuracy, warranty protection, and long-term support.
Purchase with Confidence Buy DIRECT.
 
Brand:MRCOOL®Category:4 Zones/RoomsSKU:DIYM448HPW03D216Tags:1800 sqft, 18000 BTU, 18000 In, 18K, 18K BTU, 18K In, 208-230V, 230V, 4 Ton, 4 Zone, 48000, 48000 BTU, 48000 In, 48K, 48k BTU, 48K In, 6000 BTU, 6000 In, 6K, 6K + 6K + 9K + 18K, 6K BTU, 6K In, 9000 BTU, 9000 In, 9K, 9K BTU, 9K In, DIY, DIY 5th Gen, DIY Multi Zone, DIY Series, DIYM448HPW03D216, Forty-Eight-Thousand, Four Zone, Multi 4 zone mini split, MULTI ZONE, Pre Charged, Pre-Charged R-454B, R-454B, R-454B refrigerant, R454B, Up 1800 sqt, Up 2000 sqft