Zone Air Launches Free Manual J Calculator and DIY Install Video Library for Homeowners

SALT LAKE CITY, UT, US, May 19th, 2026, FinanceWire

Zone Air, a direct-to-consumer manufacturer of ductless mini-split heat pump systems, today announced the public release of a free online Manual J residential load calculator and a new step-by-step DIY installation video library at zone-air.com. Both resources are designed to help homeowners correctly size, select, and install a ductless system without prior HVAC experience.

The web-based calculator follows ACCA Manual J methodology and draws on weather data from more than 600 U.S. climate locations to estimate room-by-room cooling and heating loads. Users can run either a whole-home or room-by-room analysis, and the tool returns sizing recommendations matched to specific Zone Air models. The companion video library opens with a full installation walkthrough for the company's 9,000 BTU 115V wall unit, with additional videos for the 12,000 BTU and 18,000 BTU models scheduled to follow.

"Incorrect sizing and installation mistakes are the two issues we hear about most from new ductless buyers," said Ben Zuro, founder of Zone Air. "Both of these tools exist so customers can get it right the first time, on their own, without paying a contractor to do the math or the install."

Ductless System Efficiency and Product Specifications

According to the U.S. Department of Energy, conventional duct systems can lose 20 to 30 percent of the air moving through them due to leaks, holes, and poorly connected ducts (energy.gov). Because ductless systems deliver conditioned air directly into the room being served, they avoid those losses, which is one reason ENERGY STAR-certified ductless heat pumps frequently carry higher efficiency ratings than comparable central systems.

Zone Air's current product line consists of 9,000, 12,000, and 18,000 BTU single-zone systems using R-454B, a lower-GWP refrigerant. All models are ENERGY STAR certified with SEER2 ratings up to 24. Every unit ships with pre-charged refrigerant line sets and quick-connect fittings, removing the need for vacuum pumps, manifold gauges, or other specialized HVAC tools at the install site.

Warranty Coverage for Customer-Installed Systems

Zone Air honors its full manufacturer's warranty on systems installed by the homeowner when installation follows the company's documented procedures. The policy is intended to remove a longstanding obstacle for DIY buyers, who have historically had to choose between paying for professional installation or forfeiting warranty coverage.

About Zone Air

Zone Air is a direct-to-consumer manufacturer and assembler of ductless mini-split heat pump systems based in Salt Lake City, Utah. The company designs, assembles, and tests its units at its facility at 4375 W 1980 S, Salt Lake City, UT 84104, and sells direct to homeowners through zone-air.com. Zone Air's full product line is ENERGY STAR certified and uses R-454B refrigerant. More information is available at zone-air.com.

Contact

Andrew Winters
Zone Air
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