Guest Posted April 3, 2012 Share Posted April 3, 2012 there's also the engine coolant radiators to consider. Link to post Share on other sites
Chewing Gum 17 Posted April 3, 2012 Share Posted April 3, 2012 We have a webasto diesel air blower type - went for slightly bigger model and glad we did - Model 3900 I think. They are quite expensive to buy and we have noticed some smell from the ducting I think. The smell may be improving with use. Link to post Share on other sites
Fogg 427 Posted April 3, 2012 Author Share Posted April 3, 2012 Did you install it yourself or get it done (as I'd need to)? If so, who did it? Link to post Share on other sites
Chewing Gum 17 Posted April 3, 2012 Share Posted April 3, 2012 Did it myself but quite a big job. Got it from HMB electrical - I think they can do installation. Link to post Share on other sites
Fogg 427 Posted April 3, 2012 Author Share Posted April 3, 2012 Cheers, will check it out. Link to post Share on other sites
Steve Pope 255 Posted April 4, 2012 Share Posted April 4, 2012 Have recently put in a Dickinson diesel heater, still to be plumbed to the fuel supply, this winter will be test time. The NZ agent is a fishing company in Bluff. Price was reasonable, google "Dickinson" for the range of models, There is a choice of floor or bulkhead mounted ones. All bar 2 of the models (Heaters not stoves) have 3" flues the other 2 have 4" ones, they all use the same size burner though. I had an Olieovne Reflex that needed rebuilding, the price of parts (burner pot etc) inc freight was almost as much as a new Dickinson, so I went with the Dickinson. They both use the same oil pot diesel system. Link to post Share on other sites
wheels 544 Posted April 4, 2012 Share Posted April 4, 2012 The advantage of the blower type, either Gas or Diesel, is that the warm air gwets moved around the boat, you can have one or more outlets and it can be temperature controlled. Disadvantage is that they are a little noisy. The type liuke the Dickisons and Force 10 are quiet and certainly produce the heat, but the disadvantage is they take up a bit of room and a lot of boats don;t have an ideal area to place them in. Plus the heat tends to stay at the installation level of the heater and doesn't move around the cabin so easily. If you have multiple area's like say an aft cabin, you can't get the heat to it. Not easily at least. I have a Force 10 LPG and it is great apart from the heat not getting down around the floor area. I use a small fan to move the heat around and that works well. What I am going to do soon is pipe the heat from the Main Cabin to the Aft cabin and back again with the colder air so as it circulates. Link to post Share on other sites
otto 31 Posted April 4, 2012 Share Posted April 4, 2012 some good comments here but you need to decide what you want to heat. It is only 35mtrs (another post) which would tend to ducting but the shorter option is to consider the room you are in. More air movement more heat loss and the greater the heat needed, wind chill also. Small dry room at 18C is warmer than a damp one at 25C with air blowing around. Link to post Share on other sites
idlerboat 116 Posted April 4, 2012 Share Posted April 4, 2012 ....ok ...so where do you manage to find space to fit these heaters. Jannali is 38 foot but I am stuffed if I can work out a safe place to instal any of the above options ..... Used to do the mini flower pot on the metho stove in the old boat, but she sealed up a bit to well and we got a bit to close to being poisened one night ... As a live aboard while in the marina I use a little fan heater but that is no good once sailing... The best advice I have been given so far (but cant do it at the moment) is GO NORTH YOUNG MAN...GO NORTH.....: ) : ) Link to post Share on other sites
Steve Pope 255 Posted April 4, 2012 Share Posted April 4, 2012 A small 12volt fan will move the warm air to whearever you want. I have seen a Reflex heater installed under the cabin table, On "Antartica" she's big boat though! Bulkhead mounted Dickinson "Newport" has a small foot(wall)print. Link to post Share on other sites
wheels 544 Posted April 4, 2012 Share Posted April 4, 2012 The Dikinbson and Force 10 are as Steve say's, small wall mounted units. They need a little more room. I melted a hole in my Sailing jacket when I came against it one day.So I installed a screen around it so I can niot come in direct contact with it. These units need a chiminy installed. The blower type get installed remotely down in the eninge room and you just have a small 2" or so vent mounted down at floor level somewhere to blow the warm air in. The unit is very small. Looks kinda like a jet engine, which it basicaly is. A unit that burns the diesel and a fan that blows the air through and out the exhuast. The air that goes into the boat is taken from around the unit so as it is clean air. Link to post Share on other sites
PaulR 3 Posted April 4, 2012 Share Posted April 4, 2012 The air that goes into the boat is taken from around the unit so as it is clean air. Clean and much warmer air hopefully Link to post Share on other sites
Fogg 427 Posted April 4, 2012 Author Share Posted April 4, 2012 Yeah I'm pretty convinced I want a diesel oil driven heater with 2 ducted outlets (one in saloon, one fwd cabin) with the usual temp controller etc. I like this setup cos as well as heating the air it introduces drier air into the cabin creating a de-humidifying effect. Which is real important cos when it's cold the damp is actually worse than the temperature - damp bedding, clothes, seat cushions are horrible. People who use these heaters report the boat is far drier - things like paper charts stay crisp instead of going damp and mouldy. Link to post Share on other sites
smithy09 50 Posted April 5, 2012 Share Posted April 5, 2012 We had an Eberspacher 4kW hot air unit on our Dufour 29. We had the unit fitted in an aft locker and the hot air ducted to the main cabin and the fwd cabin. It was brilliant! I installed it myself. It was pretty easy. Just teed off the diesel after the fuel filter.. I think it has its own pump. Advantages: instant heat, very fast heating of the cabin. NO condensation. Very low deisel use. Didn't seem loud, in that we never noticed it. Disadvantages: High purchase price. High current draw (but this may have improved from the mid 80s) With the ducting you have to restrict the shorter runs to get air out of the longer runs. I will certainly look at fitting one to the Marshall to extend the season.. I just have to add it to the already huge list.... I like the sound of Bad Kitty's installation. Having a hot water heater is a definate bonus, getting away from Califonts.. I like that boat more and more!! Link to post Share on other sites
Guest Posted April 17, 2012 Share Posted April 17, 2012 We use a non glazed ceramic flower pot upside down on the stove. We don't close the hatch (carbon monoxide) Usually have to turn it off after half an hour. $1.95 from a gardening shop. Link to post Share on other sites
Guest Posted April 17, 2012 Share Posted April 17, 2012 The air that goes into the boat is taken from around the unit so as it is clean air. Clean and much warmer air hopefully had a hillarious situation to do with a charter cat where the front port and stb cabins each had seperate A/C units mounted side by side in the centre, one side died so while out for repairing just teeded the duct into the working one, in the cabin of the "working" side for the charter there resided a chubby balding flatulant bastard.......and guess who he " shared" all with Link to post Share on other sites
wheels 544 Posted April 18, 2012 Share Posted April 18, 2012 We use a non glazed ceramic flower pot upside down on the stove. We don't close the hatch (carbon monoxide) Very dangerous thing to do. You don't get Carbon Monoxide from LPG. It's Carbon Dioxide and water. But that is still able to soffocate you and being heavier than air, an open hatch does not keep you safe. Although Carbon monoxide gives you a bad headache, which is a warning that you are breathing it. Carbon Dioxide you don't know anything if you are breathing it. You feel a little sleepy and before you know it, you are wearing wings and playing a Harp. Link to post Share on other sites
Farrari 4 Posted April 18, 2012 Share Posted April 18, 2012 You don't get Carbon Monoxide from LPG. It's Carbon Dioxide and water. Is that statement 100% correct Wheels? I understood that you if you burn LPG cleanly you end up with Carbon Dioxide and water, but if there is insufficient oxygen you end up with Carbon Monoxide. Either way, both are bad. The only advantage of carbon monoxide is that it is slightly lighter than air. Personally I think the flowerpot arrangement is very dangerous either way. not only will it try and kill you, it will make the inside of the boat wet while doing it. Link to post Share on other sites
wheels 544 Posted April 18, 2012 Share Posted April 18, 2012 Yes it's correct. Mainly in that the Gas in this instance fully burns because there is plenty of oxygen, I is when a Carbon based fuel burns without sufficient Oxygen that CO is produced. Carbon Monoxide is not lighter than air. Yes I saw the Wiki article saying it was, but that is not correxct. Air is a mixture of gasses each with different Mass. So the first mistake in that article, is saying it is lighter than air. Because Air is what exactly. 72% is Nitrogen, which has is ~14g/mol and CO is 28g/mol. Oxygen is ~15g/mol. Which if you think about it, CO is one Oxygen atom plus one Carbon atom, so it makes sense that it is going to be heavier than Oxygen on it's own for a starter. Link to post Share on other sites
Megwyn 2 Posted April 19, 2012 Share Posted April 19, 2012 The real danger of Carbon Monoxide is that it preferentially bonds with haemoglobin thereby preventing the Hb from bonding with Oxygen. Then it holds on tight, and does not release the Hb, thereby taking that molecule out of the equation for oxygenation of cells. Enough CO in the bloodstream causes anoxia (because the O2 has nothing to bond to), and death follows. Mind you - it is a rather painless way to go. Just go to sleep my child . . . Link to post Share on other sites
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