Swap out your ZB Mark III hose with a 4-inch flex hose, commonly used for dryers!
Zero Breeze Mark 3 to 4-Inch Flex Hose Adapter
Connect your Zero Breeze Mark 3 portable AC to a standard 4-inch dryer flex hose — perfect for routing cool air or exhausting heat through walls, windows, or ductwork in your van, RV, or camper build. Available for both the front-facing inflow/outflow ports and the rear exhaust ports.
Printed in UV-resistant ASA filament. Tested on the Zero Breeze Mark 3. Not affiliated with ZeroBreeze.
Which Variant Do You Need?
Front Outflow — top port on the front of the ZBM3 where cool air exits. Use to direct conditioned air into your space.
Front Inflow — bottom port on the front. Use to draw warm air in from your space.
Rear Exhaust Outlet — rear port that exhausts hot air. Use to route waste heat outside your vehicle.
Rear Exhaust Inlet — rear port that draws in fresh air. Use to pull outside air into the AC unit.
Prerequisites
Each variant requires the corresponding official Zero Breeze duct adapter to mount to the ZBM3 — not included:
Front ports: Zero Breeze Front Air Outlet or Inlet Duct Adapter
Rear ports: Zero Breeze Rear Air Outlet or Rear Air Inlet Duct Adapter
These are available directly from ZeroBreeze's website.
Installation Notes
Hose clamps are recommended to keep the 4-inch flex hose secure.
The adapter is a snug fit designed to direct all airflow into the hose with minimal leakage.
Note on airflow: Using a 4-inch hose on the inflow ports may cause a slight reduction in airflow. This is a known limitation of the ZBM3's architecture.
Compatibility
Tested with: Zero Breeze Mark 3 (ZBM3)
Hose size: 4-inch dryer flex hose
Ideal for: van conversions, teardrop campers, RV builds, tent camping
Material
Printed in ASA (Acrylonitrile Styrene Acrylate) — rated to 130°F (54°C), UV-resistant, built for long-term outdoor use. Printed in black to match the ZBM3. Custom colors available — contact us.
