what is the lowest outdoor operating temperature for heating mode?

Neither of the two answers had to do with the HEATING function. Try again.

Can the condenser be mounted in an attic or does it have to be mounted outdoors?

NO, the attic gets too hot in summertime.

Does the kit include the line set cover?

No. It does not. You will need to buy that separately

Reviews cite a range from 20-30 Amp breaker for the 12K/115V. Max fuse rating is 25. What's best outside (fusable quick disconnect) vs at breaker box?

I used a Eaton 60 amp, 2 pole non fusable , enclosed AC switch disconnect near the outside unit. I also used 6 ft outdoor "AC Whips" for the wiring outside made by Southwire. I ran indoor wire from the breaker to a junction box inside near the exit to the outside and joined the outdoor wire(AC whip) there as well. As using indoor wire outside is not up to code.

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MRCOOL 12,000 BTU WiFi Smart DIY Star 4th Generation Ductless Remote Controlled Mini Split Air Conditioner with Sleep Mode Function, White

MRCOOL 12,000 BTU WiFi Smart DIY Star 4th Generation Ductless Remote Controlled Mini Split Air Conditioner with Sleep Mode Function, White

Product ID: 449852057

Details

Brand
MRCOOL COMFORT
Capacity
1 tons
Color
White
Cooling Power
12000 british
Noise Level
23.5 db
Product Dimensions
16"D x 26"W x

📶WiFi smart remote control

❄️12,000 BTU powerful cooling

🛠️DIY quick connect install

R77798

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Description

❄️ Stay cool, stay connected, stay ahead.

SMART CLIMATE CONTROL - Control your comfort from anywhere with app, remote, or voice commands—because convenience is king.
ULTRA QUIET OPERATION - Whisper-quiet 23.5 dB noise level keeps your space serene and distraction-free.
ALL SEASON PERFORMANCE - Operates efficiently down to 5°F, perfect for year-round cooling and heating needs.
MAINTENANCE MADE SIMPLE - Low refrigerant alarms and filter alerts keep your system running at peak efficiency without guesswork.
EFFORTLESS DIY INSTALLATION - Pre-charged Quick Connect line sets mean no special tools or training—get cool in hours, not days.

The MRCOOL 12,000 BTU 4th Gen DIY Star Mini Split AC combines powerful, energy-efficient cooling with smart WiFi control and ultra-quiet operation. Designed for easy installation with pre-charged Quick Connect lines, it supports year-round comfort even in low ambient temperatures. Featuring automatic restart, maintenance alerts, and a sleek white design, it’s the perfect upgrade for modern homes seeking seamless climate control.

Specifications

ASIN	B0B39H7CNK
Additional Features	Heating & Cooling Function
Air Conditioner Application	Residential
Air Flow Efficiency	325.1 cubic_feet_per_minute_per_watt
Annual Energy Consumption	22.5 kwh
BEE Star Rating	Energy Star Certified
Best Sellers Rank	#970,316 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #254 in Split-System Air Conditioners
Brand Name	MRCOOL COMFORT MADE SIMPLE
Capacity	1 tons
Color	White
Compressor Type	Rotary
Control Method	App, Remote, Voice
Controller Type	Remote Control
Cooling Power	12000 british thermal units
Core Material	Aluminium Alloy
Customer Reviews	4.3 4.3 out of 5 stars (192)
Efficiency	High
Filter Type	Nylon
Floor Area	500 square_feet
Form Factor	Mini-Split
Included Components	Ductless Mini-Split
Installation Type	Split System
Inverter Type	Has Inverter
Item Dimensions D x W x H	16"D x 26"W x 36"H
Item Type Name	Mrcool 4th gen Energy Star Ductless Mini-Split, White
Item Weight	100 pounds
Manufacturer	HVAC Distributing LLc
Model Name	DIY-12-HP-WM-115C25
Model Number	DIY-12-HP-WM-115C25
Noise	23.5 db
Number of Power Levels	2
Power Source	Corded Electric
Refrigerant	R-410A
Seasonal Energy Efficiency Ratio (SEER)	22
Series Number	4
Start Year	2020
UPC	810035935150
Unit Count	1 Count
Voltage	115
Warranty Description	Warranty
Warranty Type	Limited
Wattage	25

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R77798

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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