The Zero Breeze Mark 3 is a 48V compressor-driven portable climate unit that cools and heats. Cooling capacity is 5280 BTU at a 500W rated input; heating capacity is 5800 BTU. That's more than double the Mark 2's output from a unit that's only slightly heavier — the Mark 3 weighs 22 lb and measures 22 × 10 × 12 inches. Refrigerant is R290 (propane), which is more efficient and more environmentally friendly than the R134A in the Mark 2. Dual-hose architecture handles intake and exhaust separately, keeping the space pressurized and maximizing effective cooling. An active drain system expels condensate automatically — no manual emptying.
The 48V system is the defining design choice. Running the Mark 3 from a 12V or 24V source requires the Zero Breeze 48V Booster (sold separately), which steps up to the required voltage with 85–90% efficiency. The Mark 3 Battery (1022Wh, 21700 LiPo) charges via wall adapter, solar (12V–60V DC input), or the cigarette lighter cable (trickle). At 500W draw in Rocket mode, a single battery runs roughly 2 hours. In Sleep or Care mode the draw drops substantially and runtime extends to 4–6+ hours. Two batteries in the Plus Extra package covers most full-night cooling scenarios in moderate ambient temperatures.
Seven operating modes — Rocket, Cool, Sleep, Fan, Dry, Care, and Heating — with a built-in thermostat that cycles the compressor to hold a set temperature. Effective cooling area is approximately 100–150 sq ft in a well-insulated, properly sealed space. IPX4 moisture protection. Operating ambient range: 50°F–104°F (10°C–40°C).
