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Hull376
03-22-2010, 06:25 PM
I looked over the forum and only saw a few references to air conditioning on Ariels/Commanders, so excuse me if I missed an existing thread.

The problem: Ariels are small boats. Air conditioning is bulky and expensive. But it gets hot in the south which makes sleeping on the boat in the summer a non starter without air conditioning. I've wrestled with this problem every summer and haven't liked my solutions to date.

Potential solutions:
1. fit for purpose portable marine air conditioners such as the Cruise Air hatch model (Taylormade). Pros: strong construction, controls accessible inside the hatch, mounts to various sized hatch openings. I started out using one of these, the 5,000 BTU model. Cons: Heavy (70 lbs +) takes two to get it on and off the boat, getting it on the foredeck is not easy. Expensive ($799). Doesn't cool well in daytime temps of 95 degrees with sun beating down on the deck. The newer 7000 BTU model may work fine, though. Storage is a problem on an Ariel. Won't fit in the cockpit lockers. Hard to get down our tight companionway, have to put on the sole or on a bunk. Need to work out at the YMCA before attempting to move it into the cabin. But better tie it down good! Mine fell off bunk once, broke the ties in heavy weather. Won't fit down the front hatch either.

2. Permanently installed system. I don't have experience with these, but looks like around $1500 to outfit an Ariel. I think space loss and cost are again an issue on a small boat like the Ariel. But this would be a Cadillac solution. Maintenance issues??? Hummmm....

3. Cheap window mount air conditioner installed in the companionway or in the hatch. Lots of folks in Texas mount window units in the companionway. In the companionway, its easy to install but.... you have to move it every time you want to get in or out of the cabin. Not fun! but pros are its cheap, and can be stored in the anchor locker (more on this). Hatch mount? this is the point of this post. Experimentation. Can it work? I wasn't sure.

I've done the cruisair thing and its no good for an Ariel. I've done the companionway window air conditioner thing and its not ideal in an Ariel because it blocks access to the cabin and the steep entry makes it almost impossible to step over it and land on a step inside if you don't move it out of the way. I haven't tried the "built in" approach because of cost and complexity. Soooooo...... that leaves me with the hatch approach. The keep it simple ----cruisair approach with a window unit.

Posts below show my experiment with my $99 window unit (5,000btu) mounted similar to the cruisair. Benefit would be cold air (more than the 5,000 btu cruisair) light (35 pounds versus 70+) quieter, simpler storage options, low cost, can fit through the front hatch, one person can handle it. But the issue is how to get it to take in hot cabin air and then blow out the cold air, all down an 18x18 inch hatch, when the window unit isn't designed to do this.

Hull376
03-22-2010, 06:31 PM
Here's the Carry On. Like I said, its a solid piece of equipment and the 7,000 BTU newer units probably cool much better than this one does in really hot weather. But at 70+ pounds and the storage and moving around issues on an Ariel got me looking for other options. New units cost $799. Also pic of companionway mount of a window unit.

Hull376
03-22-2010, 06:34 PM
So here's my quick and dirty attempt to mount my $99 window unit in the front hatch. The following pics show a mounting board to go in the front hatch to support the air conditioner and air cowling.

Hull376
03-22-2010, 06:35 PM
In theory, this is what the cowling needs to do to get warm air out of the boat and cold air back in.

Hull376
03-22-2010, 06:38 PM
So what do I make this with? Since this is an experiment, I used home styroboard insulation and duct tape. It was simple to cut, light weight, and surprisingly strong after putting it together. A cover of cheap blue vinyl remnant for $5, and some foam insulation strips completes the materials list.

Hull376
03-22-2010, 06:40 PM
Finished air cowling in all its cheap glory. Side view and inside "guts". Note the foam tape strip that seals against the front of the air conditioner to separate the cold air from the warm air "chambers". Like I said, the construction is amazingly strong, won't easily crush. Its almost space age-- by the way, NASA Johnson Space Center is only 3 miles away from my dock.....and styrofoam sheet will be around for at least 1,000 years! Huh!

Hull376
03-22-2010, 06:41 PM
All put together and ready to try the experiment on the boat.

Hull376
03-22-2010, 06:44 PM
Some shots mounted in the forehatch. Fit perfect. Stable, all pieces fit down the front hatch for storage.

Hull376
03-22-2010, 06:46 PM
I store the air conditioner mounted in the anchor locker. With the two boards installed, the air conditioner thinks its sitting in a window. It doesn't protrude very far into the vee berth or the anchor locker.

Hull376
03-22-2010, 06:52 PM
So there you have it. Another solution I'm trying out this summer. The prototype works very well. Not as "shippy" as the cruisair, or the companionway mount option, but.... its much more convenient. I'll worry about the aesthetics later (paint the wooden base white to match deck, get rid of exterior duct tape, etc). But the test results are encouraging. Although it is very stable and can't slide around, there are some drain holes around the base that could be used to secure a strap over the air conditioner just in case. I added some wood blocks on the underside of the base that correctly positions the base to the hatch opening, and they also prevent the base from moving laterally: the base can't slide off the hatch. The cowling stays in place with just a couple of velcro strips on the top of the air conditioner and inside the front top edge of the cowling. Its a tight fit, no air leakage, and it is tight enough that you (or wind) can't dislodge it without some real effort. But I don't plan to have this on deck when the next Ike shows up in Houston.

And ebb.... remember a few weeks ago I asked about the curve of the fore-hatch coamings??? I needed to know how much I needed to raise the sides of the mounting board so the thing wouldn't rock back and forth. Thanks again!

What are other warm, er, hot weather folks doing to sleep on their boats in the summer? My definition of hot is 90+ degrees. Lower temps than that, just use cabin fans or that wind scoop thingy..

mbd
03-23-2010, 07:00 AM
Kent, it seems like a very well thought out approach to be able to spend more time on your lovely Ariel. Kudos! (I sure don't miss those Texas summers!)

One thought: in looking at your pictures is doesn't appear that you have any cowl vents? Installing a couple of those could help keep your boat cooler not only while you're away, but when running the AC, the positive air flow would push the hot air out.

Getting closer to launch day up here! Cool and happy sailing to ya!

Tony G
03-23-2010, 08:44 AM
Kent this is newsletter worthy stuff! A/C is something we don't have to worry about much in these parts but you have an outstanding solution for those of you who must consider it. Even though you are planning on adding a finished surface, I thought the duct tape matched the Pacific blue sail cover quite nicely.:D

Being styrofoam, your prototype could easily covered with a fiberglass skin inside and out. I'd certainly take my hat off to you if it still wasn't so d@^^d! cold here!

I'm hoping what Mike added, regarding the dorade vents is true because that is what I'm counting on. Well, that a wind scoop and a sunshade over the pointy end and a bimini over the back.

Again, nice work, Kent.
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I just remembered something-do you still have the computer 'muffin' fans mounted for circulation in the main cabin?

mbd
03-23-2010, 08:53 AM
You should be fine, Tony - however, the trade winds don't blow so well in Houston. :D

Hull376
03-25-2010, 12:54 PM
Tony, Mike

Yep, those 3" computer muffin fans are still very much in operation running off the battery and charged by the solar panel. They have been running 24/7 for over 3 years now. I had one fail a couple of years ago, but I'd say as long as they don't get wet, they just keep ticking.

You guys don't have to suffer summer heat. But then you don't get as much of a charge out of sipping an Ice Cold one on a blistering day in July!