Comparison Guide
AirBuddy vs BLU3 (2025): Honest Comparison of Tankless Dive Systems
Portable, battery-powered dive systems are changing how people explore shallow reefs, clean boat hulls, and enjoy underwater recreation. Among the most talked-about systems are AirBuddy and BLU3 Nomad Mini and Nomad. While both deliver surface-supplied air without scuba tanks, the engineering behind them is very different. This guide breaks down the real-world differences so you can choose the system that best fits your needs.
- Depth & runtime comparison
- Portability & drag
- Battery system & upgrades
- Dealer network & shipping
1. Two Different Approaches to Tankless Diving
Although both systems float on the surface and deliver air through a hose, their designs reflect two different philosophies.
BLU3 uses its patented Smart Reg™ on-demand breathing technology, which reduces compressor workload and eliminates the need for an air reservoir. This allows BLU3 systems to remain significantly lighter, smaller, and more portable.
AirBuddy, by contrast, relies on a rigid red float that acts as a pressurized air reservoir, compensating for the lack of on-demand control. This adds weight, size, and drag, and requires a more complex internal layout.
BLU3 systems are designed and assembled in the USA and supported by Brownie’s Marine Group, a company with over 50 years of surface-supplied diving experience.
2. Key Specifications (Updated 2025)
| Feature | AirBuddy | BLU3 Nomad Mini | BLU3 Nomad |
|---|---|---|---|
| Max Depth | 40 ft | 15 ft | 30 ft |
| Runtime (typical) | ≈ 55 min | ≈ 40 min | ≈ 60 min |
| Weight | 26+ lbs (≈ 12 kg) | 12 lbs (≈ 5.4 kg) | 15 lbs (≈ 6.8 kg) |
| Battery Type | LiFePO₄ 6s2p | Li-ion 4s2p | Li-ion 8s2p |
| Battery Upgrades | None | DiveBoost Kit (dual-battery power) | Nomad 3X Battery (432 Wh) |
| Battery Swap | Requires disassembly / unscrewing terminals | Quick-swap, tool-free | Quick-swap, tool-free |
| Recharge Time | ≈ 3.5 hours | ≈ 3 hours | ≈ 3 hours |
| Float Design | Rigid, non-collapsible reservoir | Compact dry-bag float (optional) | Compact dry-bag float (optional) |
| Drag in Water | High | Low | Low |
| Portability | Bulky; red float cannot deflate | Backpack included | Backpack included |
| MSRP (USD) | $1,699 | $1,649 | $2,199 |
| Warranty | 1 year | 1 yr US / 2 yr EU | 1 yr US / 2 yr EU |
| Extended Warranty Available? | No | Yes | Yes |
| Ships From | Australia | USA (Florida) | USA (Florida) |
| Training | Manual only | Free Online Dive Training Course (open to everyone) | Free Online Dive Training Course (open to everyone) |
3. What About Multi-Diver Systems?
Some divers look for a single floating unit that can supply air to two people at once. AirBuddy does advertise a two-diver mode, but real-world feedback often mentions limited airflow and the need for both divers to stay very close together.
With BLU3, the recommended approach is one system per diver. Individual systems offer several practical benefits:
- Each diver has their own dedicated air supply. This eliminates shared airflow limitations and ensures consistent performance regardless of depth or breathing rate.
- Greater range and independence. With individual systems, divers can explore different areas, surface at different times, and move freely without being tethered to the same float or hose network.
- Far more versatile for real-world use. If only one person needs to clean a hull, check a prop, free a line, or explore a shallow reef, you only take one BLU3 system instead of hauling a multi-diver setup.
- Lighter overall gear load. A single Nomad or Nomad Mini weighs a fraction of a traditional multi-diver system, making setup and transport significantly easier.
- No hose tangles or position conflicts. Each diver maintains their own hose path and buoyancy, reducing inconvenience and improving safety during movement.
- Simpler dive planning. Each diver manages their own runtime, battery, and max depth instead of coordinating shared limitations.
For most recreational use, one system per diver is the most flexible and comfortable way to enjoy shallow-water diving.
If someone is absolutely set on a multi-diver surface-supplied system, the better fit is a Brownie’s Sea LiON Third Lung system unit, which is designed specifically to supply air to multiple divers from the surface and has been used by families and lobster fisherman for decades. BLU3 systems focus on ultra-portable, battery-powered diving for one diver at a time.
4. Performance & Breathing Efficiency
AirBuddy’s reservoir-based design can provide adequate airflow for a single diver but often struggles with two divers, especially at depth. Many user reviews reference uncomfortable breathing resistance when the 2-diver feature is used.
BLU3 systems operate on a different principle. The patented Smart Reg™ responds to each inhale, helping to reduce compressor duty cycle and improve battery efficiency while maintaining comfortable breathing.
This on-demand approach allows BLU3 systems to stay compact without relying on a large, pressurized float.
5. Portability & Real-World Convenience
AirBuddy’s marketing presents the system as portable, but the rigid red float does not fold, deflate, or collapse because it doubles as the air reservoir. This significantly increases transport size, storage space, and drag in the water.
BLU3 Nomad Mini (12 lbs) and Nomad (15 lbs) are among the lightest ultra-portable tankless dive systems available. Both include a custom backpack, making them easy to carry to the beach, on a boat, or while traveling.
6. Battery System, Runtime Options & Upgrades
AirBuddy
- AirBuddy battery is twice the weight of Nomad battery
- Swapping requires opening the unit and unscrewing battery terminals
- No upgrade paths for longer runtime
BLU3
- Instant, quick-swap battery system with no tools required
- Modular upgrade paths:
- Nomad Mini → DiveBoost Kit (dual battery power)
- Nomad → Nomad 3X Battery (432 Wh, extended runtime)
- Approx. 3-hour recharge time
BLU3 also offers additional spare batteries so divers can easily extend their time on the water by bringing extra charged packs.
7. Hydrodynamics & Comfort in the Water
AirBuddy uses a coiled hose, which creates drag and pulls against the diver during swimming or working underwater. The rigid float also adds resistance on the surface.
BLU3 systems are built for low drag:
- Streamlined hose designed for minimal resistance
- Optional compact dry-bag float that skims the surface with minimal contact
- Ability to operate without the float
The result is a more comfortable, natural underwater experience with less effort required to tow the system.
8. Safety Resources & Training
Proper training is essential for any type of diving, including tankless diving.
BLU3 provides a free Online Dive Training Course that is open to everyone — no purchase required. This course teaches foundational concepts such as:
- Buoyancy fundamentals
- Breathing behavior
- Safe ascent habits
- Dive planning principles
- How BLU3 systems operate
AirBuddy provides a written manual but does not offer a dedicated online training program.
BLU3 also encourages divers to pursue traditional scuba training for deeper knowledge and more advanced skills.
9. Dealer Network, Service & Support
BLU3 products are available through a wide network of reputable dive retailers including:
Underwater Australasia • Brownie’s YachtDiver • Divers Direct • Scuba.com • Dixie Divers • Dive Right In Scuba • Electric Surf Sports • Nautical Ventures
This makes BLU3 easier to service and easier to purchase with confidence. You can also find a local retailer on the BLU3 dealer locator.
AirBuddy’s distribution is more limited and typically ships from Australia.
10. Reviews & Community Feedback
BLU3 maintains over 100 verified 5-star reviews and has strong coverage on YouTube and social media from real divers who highlight portability, simplicity, and responsive support.
AirBuddy has fewer reviews and more mixed feedback, especially regarding two-diver airflow, weight and bulk, and battery replacement complexity.
11. Why Divers Choose BLU3
For many divers, the decision comes down to real-world convenience, upgrade options, and support. BLU3 is designed to be as portable and practical as possible while offering a clear path to longer runtimes through modular batteries.
| Category | BLU3 Advantage |
|---|---|
| Weight & Portability | Light 12–15 lb systems with backpack included, versus over 26 lbs for AirBuddy and a rigid float that cannot deflate. |
| Breathing System | Patented Smart Reg™ on-demand airflow helps reduce compressor workload and allows a compact design. |
| Battery Upgradeability | DiveBoost Kit for Nomad Mini and the Nomad 3X Battery for Nomad provide modular runtime expansion. |
| Maintenance & Usability | Tool-free battery swaps and straightforward setup, compared to disassembly and terminal screws with AirBuddy. |
| Hydrodynamics | Minimal drag with a compact float and streamlined hose, versus coiled hose drag and a bulky reservoir float. |
| Customer Support | Large dealer network, USA shipping, and established service channels through Brownie’s Marine Group. |
| Training Access | Free Online Dive Training Course open to everyone, helping divers understand key concepts before they get in the water. |
| Reviews | 5-star average across 100+ reviews and strong community presence. |
12. Final Thoughts
AirBuddy helped introduce more people to tankless diving, but BLU3 refined the concept with smarter engineering, lighter equipment, a more flexible battery system, and a stronger support network.
For new divers, traveling divers, yacht owners, and families exploring shallow-water adventures, BLU3 Nomad Mini and Nomad provide some of the most advanced and user-friendly portable dive experiences available today.
13. Frequently Asked Questions
Is AirBuddy better than BLU3?
AirBuddy and BLU3 serve the same category, but BLU3 systems are significantly lighter, easier to maintain, more portable, and offer modular runtime expansion with upgrades like the DiveBoost Kit and Nomad 3X Battery. AirBuddy is heavier and uses a rigid float that adds bulk and drag.
Which is safer: AirBuddy or BLU3?
Safety depends on proper training and responsible diving behavior. BLU3 provides a free Online Dive Training Course that is available to everyone and helps divers understand buoyancy, breathing habits, safe ascent practices, and how BLU3 systems operate. AirBuddy offers a written manual only.
How deep can BLU3 systems go compared to AirBuddy?
AirBuddy advertises 40 ft for one diver and 20 ft for two divers, though airflow limitations have been reported with two divers. BLU3 Nomad goes to 30 ft, and Nomad Mini to 15 ft, with consistent airflow designed for one diver per system.
How long does the battery last on AirBuddy vs BLU3?
AirBuddy gets around 55 minutes. BLU3 Nomad Mini provides about 40 minutes, while Nomad provides about 60 minutes. BLU3 also offers runtime upgrades like the DiveBoost Kit for Nomad Mini and the Nomad 3X Battery for Nomad.
Which is more portable: AirBuddy or BLU3?
BLU3 systems weigh 12–15 lbs and include a backpack. AirBuddy weighs over 26 lbs and the float cannot deflate, making it far less portable for travel and storage.
Is BLU3 easier to use than AirBuddy?
BLU3 systems have instant, tool-free battery swaps and a straightforward setup. AirBuddy batteries require opening the unit and unscrewing terminals, which makes swapping more involved.
Where do BLU3 products ship from?
BLU3 ships from Florida, USA, which is advantageous for U.S.-based customers who want faster delivery and easier service. AirBuddy ships from Australia.
Does BLU3 offer extended warranties?
Yes, BLU3 offers extended warranties for Nomad Mini and Nomad. AirBuddy does not currently offer an extended warranty option. See all BLU3 extended warranty plans
Do BLU3 systems require scuba certification?
Scuba certification is not required to use BLU3 systems, but BLU3 recommends appropriate training for all divers. The free Online Dive Training Course is available to everyone and should be completed before diving.
Ready to Discover the Freedom of Tankless Diving?
Explore shallow reefs, clean hulls, and enjoy long days on the water with BLU3 Nomad Mini and Nomad. Lightweight, portable, and designed for modern diving lifestyles.