I'm working on buying one myself.

I was originally going to go with the Natures Head, but when I saw both of them at the Annapolis Boat Show this past Oct., I decided to go with the Airhead instead. My reason for that decision is because the space I have to install one isn't very big. The extra 2" clearance needed behind the NH to open the lid for removal of anything didn't appeal to me. The AH can be installed closer to the bulkhead behind it. The AH is also slightly smaller than the NH.

 

We will be placing an order next month for our new Airhead. As you stated, our reason for going the Airhead route was not having to open the body to remove the liquid container. Also, as Rhapsody said above, the footprint is just a tad smaller and we can use every inch of floor space. We will be ordering the model with the larger seat however.

 

I looked long and hard at both models. I settled on a Nature's Head, mainly b/c it fit a little better in our space, and it was slightly cheaper. But quite frankly, I don't think there are any substantive differences between the two. They each do some things slightly differently (pee bottle placement, seat, how they're emptied, etc.), but after using mine for a while I'm quite sure there'd be no substantial difference in actual practice.

I will say, I do like my NH, and have received outstanding customer service from the company. That counts for something.

 

Between the big three as I see it from my research:

Air Head:
+urine bottle changing
-I believe there were some cracking issues when they first came out (use cation if you buy used)

Natures head:
+a bit more durable construction
+looks a bit simpler to set up
-some complaints of the liquid separator not working effectively

C-Head
+price
+most everything can be replaced out of home depot
-looks like it came from Home Depot

I have read that all three are very good at customer service and stand behind there products. I have been leaning to either Air Head or C-Head. C-Head for price and Airhead for ease of bottle emptying. I had originally thought Natures head as I like that it is mostly one piece. I am still considering making my own as well. But if I do I will make some sort of stiring mechanism like the C-Head.

 

Between the big three as I see it from my research:

Air Head:
+urine bottle changing
-I believe there were some cracking issues when they first came out (use cation if you buy used)

Natures head:
+a bit more durable construction
+looks a bit simpler to set up
-some complaints of the liquid separator not working effectively

C-Head
+price
+most everything can be replaced out of home depot
-looks like it came from Home Depot

Nice list. To add a few more negatives:

- I read some critiques about the AH having issues with the gadget seals failing.

- On my NH, the venting fan died for some reason. It was replaced without question and without cost by NH, but there you go.

- The C-Head's major negative (to me) is the fact that its main tank is about 1/2 the size of AH and NH. This means you're dumping twice as often. I'm sure it still does fine, but that was the major reason I focused on AH and NH.

 

I saw a discussion somewhere about the fan placement of the NH being a negative, as it 1)pushes, not pulls the air; and 2)is at the bottom of the hose and thus any condensation will run to the fan. 2)can be answered by a loop, though

I did note the Home Depot appearance of the CH can be somewhat mitigated by spending a bit more and ordering it in mahogany or teak laminate

Watching this thread with interest, though. thanks y'all

 

I saw a discussion somewhere about the fan placement of the NH being a negative, as it 1)pushes, not pulls the air; and 2)is at the bottom of the hose and thus any condensation will run to the fan. 2)can be answered by a loop, though

Just an FYI: pushing air is more efficient than pulling it. Static pressure thing. For a small muffin fan, you want that puppy as early in the duct run as possible -- tho as you note, humidity & sulfurous emanations can't do it many favors. You can buy used or surplus 12V muffins for roughly $4 a dozen. Might pay to keep a few of them on board & to make sure the head is set up for hot-swapping them.

ETA: the urine is the source of most smell on composters; having a larger bottle may not be an advantage if it gets reeky before it's full. You can put a tsp. of sugar in the empty pee bottle, too -- said to greatly reduce odors.

 

In regards capacity and weight, at least for the fecal matter: it might be worth keeping in mind that the 'product' is desiccated, or should be, thus the volume weight should be less than, um, fresh, if you take my meaning. Yes?

 

Here's a thread from a C-Head user. http://www.sailnet.com/forums/gear-maintenance/81565-any-c-head-users.html

I've PM'd the OP in the above thread to ask how it's going. I'm really beginning to seriously consider the C-Head after today's research...

 

Whee, at this rate, I will soon be permitted to reply to PMs!

It sounds odd to be so absurdly pleased with a toilet, but I am ever so content with our C-Head. We have subjected it to fairly light use in our homemade houseboat for nearly two years, and find nothing to complain about. It is compact, comfortable, easy to clean, effective, AND odor-free, really!! I am no earth-mother, and have a delicate nose, and I am so glad we went this route, after what seemed like months of due-diligence and debate over every marine head on the market. Feel free to PM more questions...eventually I can PM right back!

 

The C-head ventilation hose, installed as suggested, needs no fan in our boat to provide sufficient draft for proper drying.

Its compact construction required no carpentry or modification to fit snugly against our bulkhead, and the height from seat to cabinsole is just like home. No platform or side clearance for a crank needed. Especially good where overhead clearance is a consideration. While it is sturdy enough, it is pretty lightweight, a significant consideration for us.

I haven't found limited capacity to be a problem. Who wants to store urine for any length of time, for heaven's sake? That is what will stink if you don't dispose of it promptly. And screw cap gallon milk jugs aren't hard to come by, if need be. The chances of our being out of hailing distance of land for more than six weeks, the storage capacity of the secondary five-gallon poop container, are frankly nil.

Yep. That C-Head suits us just fine. And in contrast to our flushing and pumping friends' heads, it is silent!!!

 

We've owned two NH and one Airhead. For us the NH wins hands down. The NH is much more user friendly as the Airheads thumb screws used to remove the urine bottle and solids container are a pain in the butt. Also the NH's after sales service is second to none.

 

Usually someone comments about one or the other so it's good to see your response after trying them both out. I have heard that the screws in the AH have been an issue for many users.

 

I am with Amelia,
another happy C-head user! My husband and I have been using one full time for about a year now.
The positives for me compared to NH and AH are:

Ease of emptying, literally you lift the lid and lift out the containers. Takes seconds. It seems the AH and NH must be disassembled to empty the poop bucket. In our small head this seemed like it would be awkward and unpleasant.

Ease of replacement of pee containers. They build up scale that makes it difficult to see how full it is from the outside, so regular replacement is nice.

A secondary containment unit. If you do not pay as close attention as you should to the fullness of the urine container and it overflows, it is contained within the easy to clean out box of the C-head, rather than leaking into hard to clean places on board. Sadly I have experience with the bonus of this feature...

It is easy to clean. Simple flat surfaces that only take a quick wipe.



Overall I think all units will work well if operated properly and it comes down to what compromises you are most willing to live with. We are happy with the choice we made and feel that the benefits far outweigh the extra frequency of emptying and the perhaps more home depot look of the C-head. And of course there is a cost consideration as well.
Disclaimer: I have no experience with NH or AH and have only looked at them at boat shows, online and watched some youtube videos about them.

 

Amelia, TJ,

how does the urine-separation scheme work on the C-Head? The pictures at the website have nothing from directly above. Does one have to sit 'just so'?

TIA

 

I think a certain fundamental amount of "situational awareness" is useful, but we haven't found it to be a challenge to park properly. Sandy's wife even was thoughtful enough to reassure me before I summoned the nerve to ask, (oh, help... Way TMI follows...a thousand pardons, kind sirs.... ) that the feminine wiring and musculature that sometimes leads to simultaneous urination and defecation, would not prove to be a problem.

 

I would encourage those who are interested in purchasing one of these units to direct detailed questions to the manufacturers. Don't be shy... They have doubtless heard it all, and they really want satisfied customers, so they do try to head off unpleasant surprises.

 

Thank you, everyone, for the input. I'd say we will go on with our initial choice of the Airhead, primarily because of the home style seat and being able to empty the urine bottle without opening the whole rig. Also the slightly smaller footprint. But in reality the differences seem pretty inconsequential.

Sorry for not responding sooner, but we actually got a chance to go sailing this weekend.

 

Thank you, everyone, for the input. I'd say we will go on with our initial choice of the Airhead, primarily because of the home style seat and being able to empty the urine bottle without opening the whole rig. Also the slightly smaller footprint. But in reality the differences seem pretty inconsequential.

Sorry for not responding sooner, but we actually got a chance to go sailing this weekend.

I think the Airhead is a very well put together unit. But the main reason we went with the Natures Head is it is so much easier to remove the urine bottle. Made a big difference to us. That said, I'm kind of intrigued by the C-Head now. Less expensive and pretty simple.

 

We met the Airhead fella (Geoff?) at the boat show. The product was well put together and he was nice. Almost got that one.

But… having perused this and the other thread here, gave consideration to the C-Head and so I now have a CH on order. More as it develops.