Nature's Head vs Air Head: 2026 Composting Toilet Comparison

Nature's Head vs Air Head: Which Composting Toilet Is Right for You?

If you're shopping for a self-contained composting toilet, the Nature's Head and the Air Head are the two names that come up in every conversation. Both are urine-diverting, gravity-vented, 12V-powered units made in the USA with 5-year warranties and loyal followings in the van life, sailing, and tiny home communities.

They're more alike than different — but a handful of practical distinctions will steer most buyers toward one or the other. Here's the full breakdown.

Side-by-Side Specifications

The Differences That Actually Matter

On paper these toilets are remarkably similar. In daily use, four design differences shape the ownership experience.

1. Price and Parts Availability

Nature's Head comes in at $1,035 vs the Air Head's $1,095 — a $60 difference that isn't huge on a four-figure purchase, but worth noting. More meaningful for many buyers is what happens after the sale: Nature's Head is available through Wild Oak Trail, and a network of authorized dealers, which makes sourcing replacement parts and accessories fast and competitive. Air Head sells exclusively direct from the manufacturer in Maine, so every replacement part runs through one channel with no alternatives.

For a toilet you're depending on full-time, parts availability is a practical consideration that tends to matter more the longer you own the unit.

2. Urine Bottle Size and Visibility

Nature's Head ships with a 2.2-gallon transparent bottle. Air Head uses a 2-gallon opaque bottle with a small sight window to check fill level. The capacity difference stretches emptying intervals slightly — meaningful when you're doing it every 2–3 days — and the transparent design gives you an instant, accurate read on how full the bottle is. Air Head users occasionally report overflow incidents tied to the sight window being easy to miss; Nature's Head's clear bottle eliminates that guesswork entirely.

3. Urine Bottle Access

This is the most commonly cited practical difference between the two. To access the urine bottle on a Nature's Head, you unlatch the upper housing and lift it — a straightforward process, though it briefly exposes the solids compartment. The Air Head's bottle slides out from the front without opening anything else, making it a quicker daily task.

For most users the Nature's Head process becomes routine within a week. If minimizing that interaction is a priority, Air Head's front-access design is a genuine convenience win.

4. Seat Comfort

Air Head uses a standard residential-style toilet seat with a rubber gasket seal — comfortable, familiar, and replaceable. Nature's Head uses a molded plastic seat integrated into the bowl. It's functional and seals effectively. 

5. Crank Handle and Installation Flexibility

Air Head lets you choose left- or right-side handle placement when you order — useful in tight van or boat installations where clearance on one side may be limited. Nature's Head's standard model has the crank on the right side only, with a spider handle variant available for a more compact space. Check your space before deciding if this matters for your build.

What Long-Term Users Say

Nature's Head Users

• Praise the larger urine bottle capacity and fewer emptying cycles
• Appreciate the transparent bottle — easy to monitor, no overflow surprises
• Value the wide availability of parts and accessories through dealers
• The molded seat is the most common complaint, though most adapt or use a seat cover

Air Head Users

• Universally praise the residential seat comfort and front-access bottle
• The urine sight window is a recurring complaint — small, hard to read, overflow-prone
• Marine and sailboat users favor the rounded body shape for tight installations
• The agitator handle doesn't reach the bottom portion of the composting bin, occasionally requiring manual scraping at emptying time

Users Who Have Tried Both

The consistent verdict from reviewers who've used both: the toilets are functionally very similar day-to-day. Those who switched from Air Head to Nature's Head most often cite parts availability and the larger bottle as the deciding factors. Those who prefer Air Head point to the seat and the front-access bottle as worth the premium.

Installation: One Practical Difference

Both toilets install the same way — bolt to the floor, run a vent hose to the exterior, connect a 12V wire to the fan. The one detail to check before deciding: vent hose size. Nature's Head uses a smaller vent opening (1.25" PVC recommended), while Air Head requires a 1.5" ID / 2" OD hose and a 2.25" exterior hole. If you're retrofitting into an existing build with a pre-drilled hole, Nature's Head's smaller requirement is more likely to work without modification.

For a full installation walkthrough, see our RV & van life installation guide.

Who Should Choose Which?

Choose Nature's Head If:

• You want the lower price and better long-term parts access
• A larger, easier-to-read urine bottle matters to you
• You want flexibility — the Weekender model is available for smaller spaces
• You're on a tight solar budget (slightly lower fan draw)
• You prefer buying through an authorized dealer rather than direct-only

Choose Air Head If:

• Seat comfort is your top priority for daily full-time use
• Front-access urine bottle removal is important to you
• You need the crank handle on the left side
• You're installing in a tight marine application where the rounded body might fit better

Frequently Asked Questions

Are Nature's Head and Air Head the same thing?

No, but they're built on the same principle. Both are self-contained, urine-diverting composting toilets with 12V fans and manual crank agitators. Air Head has been on the market since 2001; Nature's Head since approximately 2009. The main differences are seat design, bottle access, handle placement, pricing, and parts availability.

Which one smells less?

Both are virtually odor-free when properly maintained. Urine separation prevents ammonia buildup, and the 12V fan exhausts any trace odors through the vent. Neither unit has a meaningful advantage on smell control.

Which is better for full-time van life?

Both work well for full-time use. Nature's Head offers more liquid capacity, a lower price, and easier parts sourcing — advantages that tend to compound over time. Air Head offers a more comfortable seat and faster urine bottle access. For most full-time van lifers, Nature's Head's value proposition edges it out, but the right choice depends on which trade-offs matter most to you.

Do they use the same composting medium?

Yes. Both use coco coir or peat moss. Coco coir is recommended for both — it offers better moisture absorption, structure retention, and pest resistance than peat moss.

The Bottom Line

The Nature's Head and Air Head are both well-built, USA-made composting toilets with 5-year warranties and proven track records in full-time living situations. For most buyers, Nature's Head offers the stronger overall package — lower price, larger urine bottle, broader availability, and a size option for smaller spaces.

Air Head earns its following for good reason — the seat comfort and front-access bottle are real quality-of-life wins. But if you don't have a specific reason to go Air Head, Nature's Head is the easier recommendation on value and long-term ownership.

Browse our full Nature's Head selection — including the standard model, the Weekender, and accessories like extra urine bottles and coco coir.