The MrCool DIY 5th Generation 36,000 BTU multi-zone condenser puts whole-home ductless comfort within reach of a capable DIYer. One outdoor unit supports up to four independent indoor zones — each with its own temperature control — covering a typical 1,500–2,000 sq ft home without a single run of ductwork. Pre-charged Quick Connect line sets mean no refrigerant certification is needed for the mechanical install, and 5th Gen upgrades push the heating range down to –13°F (–25°C), making it a serious year-round option for Canadian and northern US climates. Plan your zones carefully upfront, bring in an electrician for the panel connections, and most homeowners have the system running in a weekend.

The MrCool DIY 5th Generation 18K BTU air handler is the indoor half of a mini-split built for larger spaces — open-plan living areas, primary bedroom suites, or finished basements in the 600–900 sq ft range. It works as a standalone single-zone system or as the high-capacity unit in a multi-zone setup. Like the rest of the 5th Gen DIY lineup, it ships with a pre-charged Quick Connect line set, so no refrigerant certification is needed for installation. Built-in Wi-Fi, redesigned airflow vanes, and near-silent operation at low fan speeds round out an indoor unit that's as livable as it is capable.

The MrCool Easy Pro 5th Gen is the contractor-grade mini-split for homeowners who want more than the entry-level Advantage Series — without going the DIY route. The defining upgrade in this generation is the switch to R-454B refrigerant, a lower-GWP alternative to R-410A that's quickly becoming the industry standard under EPA phasedown regulations. Paired with improved cold-climate performance down to –13°F (–25°C) and SEER2 ratings in the low 20s, the Easy Pro 5th Gen is the smarter long-term investment when you're hiring a contractor anyway.