9K BTU Complete System
MRCOOL® 9k DIY 5th Generation Bundle - includes Condenser, Air Handler, DIY® Quick Connect® Line Set, DIYPRO® Cable, and Remote - 115V
Model: DIY-09-HP-WM-115D25-O
- Condenser
- Air Handler
- DIY® Quick Connect® Line Set — 25 ft, pre-charged
- DIYPRO® Cable
- Remote
- Free shipping to the lower 48 · tracking emailed
- 7-yr compressor / 5-yr parts warranty
- No vacuum pump or special tools
- Real install help from people who've done it
Overview
Who it's for: The 9K 115V system is a good fit for a bedroom, home office, or small shop. It runs on a dedicated 115V circuit, which helps when your panel has no room for a 230V breaker.
What's in the box
- Outdoor condenser
- Indoor wall-mount air handler
- 25 ft Quick Connect® pre-charged line set
- DIYPRO® cable
- Remote and Wi-Fi smart controller kit
Key specs
| Size | 9,000 cooling / 10,000 heating BTU |
|---|---|
| Voltage | 115V |
| SEER2 | Up to 23.6 |
| Coverage | Up to about 350 sq ft |
| Line set | 1/4 × 3/8 in, 25 ft included |
| Refrigerant | R-454B |
| System model | DIY-09-HP-WM-115D25-O |
| Indoor model | DIY-09-HP-WMAH-115D25-O |
| Outdoor model | DIY-09-HP-C-115D25-O |
| UPC | 840255588539 |
Common questions
Will a 9K cool a big room?
It's sized for up to about 350 sq ft. For a larger or poorly insulated room, look at the 12K or 18K.
What breaker does it need?
MRCOOL lists 18 A minimum circuit ampacity and a 20 A maximum breaker, on its own dedicated circuit. A qualified electrician should size the wire.
Can I plug it into an outlet?
No. It's 115V, but it's hardwired on a dedicated circuit with a disconnect.
Can I extend the line set?
Yes, up to MRCOOL's 75 ft maximum. Email us before ordering so we can match couplers to the 1/4 × 3/8 in line.
More help: sizing guide, electrical guide, line set guide.
Shipping & returns
Free shipping to the lower 48. Orders are processed within 1–2 business days and we email tracking as soon as your order ships. See our Shipping Policy and Returns & Refunds.
Every complete single-zone system
It all mixes and matches.
Every unit here is MRCOOL® DIY® 5th Gen. These are the pieces that pair with this one.
This unit includes a 25 ft pre-charged line set. Only need more? Add an extension and a coupler kit.
Four steps. One weekend.
-
Hang the air handler
Level the wall plate, drill the pass-through, and hang the indoor unit.
Indoor -
Set the condenser
Place the outdoor unit on a pad or wall bracket with clearance to breathe.
Outdoor -
Connect the lines
Run the pre-charged Quick Connect® line set and tighten both ends with two wrenches.
Lines -
Power up
Hook up the dedicated circuit, pair the SmartHVAC app, done.
Power
Electrical hookup must follow local code.




