• MRCOOL DIY 5th Gen 3-zone multi-zone condenser
  • MRCOOL DIY 3-zone condenser angle
  • MRCOOL DIY 3-zone condenser side
  • MRCOOL DIY 3-zone multi-zone system example
  • MRCOOL DIY 4-zone multi-zone condenser
  • MRCOOL DIY 4-zone condenser ports
  • MRCOOL DIY 4-zone condenser side
  • MRCOOL DIY 4-zone condenser rear
  • MRCOOL DIY 4-zone multi-zone system example
  • MRCOOL DIY 5th Gen 5-zone multi-zone condenser
  • MRCOOL DIY 5-zone condenser angle
  • MRCOOL DIY 5-zone condenser side
  • MRCOOL DIY 5-zone multi-zone system example
  • MRCOOL DIY 6-zone multi-zone condenser
  • MRCOOL DIY 5th Gen 6-zone condenser
  • MRCOOL DIY 6-zone condenser side
MRCOOL DIY 5th Gen 3-zone multi-zone condenser
MRCOOL DIY 3-zone condenser angle
MRCOOL DIY 3-zone condenser side
MRCOOL DIY 3-zone multi-zone system example
MRCOOL DIY 4-zone multi-zone condenser
MRCOOL DIY 4-zone condenser ports
MRCOOL DIY 4-zone condenser side
MRCOOL DIY 4-zone condenser rear
MRCOOL DIY 4-zone multi-zone system example
MRCOOL DIY 5th Gen 5-zone multi-zone condenser
MRCOOL DIY 5-zone condenser angle
MRCOOL DIY 5-zone condenser side
MRCOOL DIY 5-zone multi-zone system example
MRCOOL DIY 6-zone multi-zone condenser
MRCOOL DIY 5th Gen 6-zone condenser
MRCOOL DIY 6-zone condenser side

MRCOOL

MRCOOL DIY 5th Gen Multi-Zone Ductless Mini-Split Heat Pump Condenser, 3-6 Zone, 18K-55K BTU, R-454B

SKU DIY-MULTI3-18HP230D-O
$1,555.00
$1,555.00

Get 5% off from listed price using code SAVE5 at checkout.

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  • 🧾 No Sales Tax — in most states
  • 🛡️ Price Match Guarantee — found it cheaper? Call (720) 575-1376 and we’ll match it
  • ✅ Manufacturer Warranty Included
Model:

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    Dealer

  • Free Shipping

    On every order

  • 30 Day Returns

Estimated shipping time

Order cutoff: 5:00 PM Eastern Time
Handling time: 1 to 3 business days
Transit time: 3 to 7 business days
Total delivery time: 4 to 10 business days

These are estimates, not guarantees. We do not warehouse equipment ourselves — your order is placed with the manufacturer once you buy, and most items are released for shipment within 1 to 3 business days. If your item is on back-order, or the manufacturer confirms a longer lead time, we will contact you promptly and you may cancel for a full refund with no fee.

Standard shipping (free on every order) is curbside or dock-to-dock delivery to a commercial address in the 48 contiguous states and DC, or parcel delivery for smaller items. We are not currently set up to ship to Alaska, Hawaii, Puerto Rico or other US territories. Liftgate, residential, limited-access and inside delivery, rigging and crating are not included — typically $150 to several hundred dollars, quoted in writing and charged only with your prior approval.

Freight deliveries require a scheduled appointment and someone must be present to sign. Need a firm date before you buy? Call (720) 575-1376 or email support@techforgedirect.com with the model number.

Shipping Cost

Free standard shipping on every order to the 48 contiguous states and DC. No minimum order and no shipping charge at checkout.

What is your Return Policy?

30 days to request a return from the date you receive your order. Email support@techforgedirect.com with your order number and reason. We will assess your request and, once approved, send you an RMA number and detailed instructions. Do not ship anything back before you have an RMA number.

1. Return shipping costs

You as the customer are responsible for paying the return shipping costs of the items in your order. On freight-shipped machinery this can be substantial — we quote the exact amount in writing before you commit, so you decide with the full figure in front of you.

2. Preparing your return

Parcel-sized items: we email you a return label, and its cost is deducted from your refund. Freight items are collected under a bill of lading we arrange. The item must be unopened, unused and in delivery condition, including all original packaging and accessories, in a condition such that it can be re-sold as new. Machinery must not have been wired in or powered on. Photographic evidence is required.

3. Restocking fee

Change-of-mind returns carry a 25% restocking fee, deducted from your refund. On a $10,000 machine that is $2,500.

4. Damaged or incorrect products

Note it immediately when signing for delivery and send photographs to support@techforgedirect.com the day of delivery. We will ensure you get the correct product you ordered, undamaged, as soon as possible, at no cost to you — no return shipping charge and no restocking fee.

5. Refunds

Processed within 7 business days of your returned item being received and inspected.

6. Cancellations

Cancel any time before your order ships for a full refund with no fee.

See our full Return and Refund Policy and Cancellation Policy.

MRCOOL DIY 5th Gen 3-zone multi-zone condenser MRCOOL DIY 3-zone condenser angle MRCOOL DIY 3-zone condenser side MRCOOL DIY 3-zone multi-zone system example MRCOOL DIY 4-zone multi-zone condenser MRCOOL DIY 4-zone condenser ports MRCOOL DIY 4-zone condenser side MRCOOL DIY 4-zone condenser rear MRCOOL DIY 4-zone multi-zone system example MRCOOL DIY 5th Gen 5-zone multi-zone condenser MRCOOL DIY 5-zone condenser angle MRCOOL DIY 5-zone condenser side MRCOOL DIY 5-zone multi-zone system example MRCOOL DIY 6-zone multi-zone condenser MRCOOL DIY 5th Gen 6-zone condenser MRCOOL DIY 6-zone condenser side
MRCOOL DIY 5th Gen 3-zone multi-zone condenser MRCOOL DIY 3-zone condenser angle MRCOOL DIY 3-zone condenser side MRCOOL DIY 3-zone multi-zone system example MRCOOL DIY 4-zone multi-zone condenser MRCOOL DIY 4-zone condenser ports MRCOOL DIY 4-zone condenser side MRCOOL DIY 4-zone condenser rear MRCOOL DIY 4-zone multi-zone system example MRCOOL DIY 5th Gen 5-zone multi-zone condenser MRCOOL DIY 5-zone condenser angle MRCOOL DIY 5-zone condenser side MRCOOL DIY 5-zone multi-zone system example MRCOOL DIY 6-zone multi-zone condenser MRCOOL DIY 5th Gen 6-zone condenser MRCOOL DIY 6-zone condenser side

Product Description

MRCOOL DIY® 5th Generation Multi-Zone Ductless Mini-Split Condenser

Experience unmatched comfort and control with the new 5th Generation MRCOOL® DIY® Multi-Zone Ductless Mini-Split Condenser. As the name suggests, this unit is truly DIY—no HVAC professional required.

This generation features our patented Quick Connect® line sets, pre-charged with R-454B refrigerant. R-454B is a next-generation, eco-friendly option that enhances efficiency and sustainability. These line sets simplify installation by connecting directly to the condenser and air handlers—no special tools or training needed.

Once installed, the smart capabilities of this system truly shine. Use the SmartHVAC app to monitor and adjust your system from anywhere, or integrate it with Amazon Alexa or Google Home to control your comfort with voice commands. Set custom schedules, fine-tune temperatures, and track energy usage with ease.

For added peace of mind, every unit is backed by one of the industry's strongest warranties: 5 years on parts, 7 years on the compressor, and eligibility for the MRCOOL® Care Program.

Features

  • Intertek listed 5031495
  • Easy DIY installation
  • Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
  • Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
  • The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.

Indoor Units & Add-Ons (Sold Separately)

This listing is for the multi-zone condenser only. Pair it with MRCOOL DIY 5th Gen indoor units and Quick Connect line sets:

Installation & Maintenance Accessories

Specifications

Specification 3-Zone 18K 4-Zone 27K 5-Zone 36K 6-Zone 48K 6-Zone 55K
Model DIY-MULTI3-18HP230D-O DIY-MULTI4-27HP230D-O DIY-MULTI5-36HP230D-O DIY-MULTI6-48HP230D-O DIY-MULTI6-55HP230D-O
Zone Capacity 3 4 5 6 6
Cooling Capacity (BTU) 18,000 26,000 34,000 43,000 47,000
Heating Capacity (BTU) 18,000 26,000 36,000 48,000 55,000
Tonnage 1.5 2.25 3 4 4.6
SEER2 23.9 23 23 21.8 22
EER2 13 12 12 12 12
HSPF2 (Region 4) 10 9.5 9.9 10 10.6
HSPF2 (Region 5) 7.8 7 7.5 7.8 8.5
Voltage / Phase / Cycle 208/230V, 1, 60 Hz 208/230V, 1, 60 Hz 208/230V, 1, 60 Hz 208/230V, 1, 60 Hz 208/230V, 1, 60 Hz
Max Fuse/Breaker (A) 20 25 35 45 45
Min Circuit Ampacity (A) 16 23 30.5 40 43
Refrigerant R-454B R-454B R-454B R-454B R-454B
Refrigerant Volume (oz) 61.73 84.66 104.75 148.15 151.68
Sound Rating (dBA) 60 61 64 64 64
Max Total Line Set Length 172.2 ft 221.4 ft 221.4 ft 221.4 ft 221.4 ft
Liquid Line Size 1/4" 1/4" 1/4" 1/4" 1/4"
Suction Line Ports 3/8" 3/8" (3/8" x4) (1/2" x1) (3/8" x4) (1/2" x2) (3/8" x4) (1/2" x2)
Dimensions (W x H x D) 35.04 x 26.5 x 13.46 in 37.24 x 31.89 x 16.14 in 37.24 x 31.89 x 16.14 in 37.48 x 52.48 x 16.34 in 37.48 x 52.48 x 16.34 in
Net Weight 101.63 lbs 140.21 lbs 169.24 lbs 223.77 lbs 245.81 lbs
Inverter DC
Compressor Type Rotary
Auxiliary Heater Not included / not available
Fan Only / Quiet Mode / Auto Cool Yes / Yes / Yes
Color White
Warranty 7-year compressor / 5-year parts

Frequently Asked Questions

How many feet of line set can the multi-zone MRCOOL® DIY® condenser support?

It varies depending on the condenser. For example, the smallest condenser, which is a three-zone 18k BTU condenser, can support 123 feet of line set. The largest condenser, a six-zone 55k BTU condenser, can support 221 feet of line set.

How many separate spaces can I heat and cool with a multi-zone MRCOOL® DIY®?

Since the 5th Gen MRCOOL® DIY® Multi-Zone comes in sizes that can support anywhere between 2 to 6 zones, you can potentially heat and cool up to 6 different spaces.

What is the main difference between the 4th and 5th generation of DIY® mini-splits?

The 5th Gen DIY® series uses R-454B refrigerant, a more efficient and eco-friendly option than previous refrigerants like R-410A.

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