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Old 05-13-2020, 09:09 PM   #1
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Stove/Range Ventilation Hood Question

Over the years I have seen boats with and without ventilation hoods over the stove. In general what are your thoughts on having one aboard a live aboard boat? I'm not concerned with power usage, installation, or any of the technical stuff. Just looking at good reason for or against having one.


My for having one is to remove some humidity. Also to keep air flowing through the galley to help remove some heat in the summer, and help remove some cooking smells.


My against is having another protrusion through the hull and possible grease stains around the vent on the outside of the hull. However, the hood I had in one of my mobile homes had the SS restaurant type cassette filters and it never left stains on the outside siding. The filters were easy to clean as well. This would be the type I would install.
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Old 05-13-2020, 10:10 PM   #2
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If you have room for one and a path to the outside for the venting, go for it. I don’t see any downside but there would be positives to having one.
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Old 05-14-2020, 02:15 AM   #3
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You nailed the upside. also provides a nice light. Downsides is that it’s almost impossible to buy one that actually does anything useful. They are all poorly spec’d rv units.

For my gallery remodel last year I only found one 12v unit with decent specs. Mfg by Dometic, but not sold in the US. Eventually got a shady dealer in the UK to ship me one. Cost way more than it should and took months to get.

So good luck finding one worth having!
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Old 05-14-2020, 04:43 AM   #4
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Perhaps stay away from marine or RV units. Purchase a 600mm European unit without the fan. Then install a 12v inline blower in the cabinet above. Remote. Would give more flexibility for mounting and venting.
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Old 05-14-2020, 07:13 AM   #5
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As long as there's space, I'd say it's worth having. Even if it's not super effective, it'll still help a lot with humidity and smells while cooking.
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Old 05-14-2020, 08:05 AM   #6
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If I were considering one, I wouldn't limit myself to the marine or RV units. It's very common to have an inverter on the boat. Why not get a 120 VAC unit and run it off the inverter like I do my refrigerator.

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Old 05-14-2020, 08:07 AM   #7
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If I were considering one, I wouldn't limit myself to the marine or RV units. It's very common to have an inverter on the boat. Why not get a 120 VAC unit and run it off the inverter like I do my refrigerator.

Ted

Not a bad idea, particularly for anyone with an electric stove. I still fail to understand the logic on my boat of having a mediocre design, 12v powered stove hood when the stove is electric and requires 120v available to use it...
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Old 05-14-2020, 08:39 AM   #8
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An alternative we prefer is an over the range microwave that has a range vent fan built in, operable separately from the microwave function. Had that on our old Hatteras and our current home. We are avid, and often smokey cooks and couldn't imagine not having a vent. Though on some boats, there is an easy to open hatch right overhead, and/or adjacent portlights which can work well.
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Old 05-14-2020, 08:45 AM   #9
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I designed my own. Had the local sheet metal co. Make it and installed a bilge blower. I added a resistor to two way toggle switch so I could have hi and low speed.
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Old 05-14-2020, 08:51 AM   #10
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I'm building the boat. I can configure everything the way I want to. The hood I have is for a 30 inch wide range. The fan is 8 inches but the vent pipe is 9 inches and steps down to 6 using a cone shape. It uses round sheet metal type AC/heating duct to direct air outside of the house. I can change that orientation to straight up if I need to. I could also change the fan but it is located inside the hood itself and is accessed by removing the filters. It makes for a tighter installation I think. I don't know the CFM rating. I'm not sure if it has one. The fan wattage was 500 watts. This unit doesn't have light in it. The hood is currently packed away. I've been moving things around between my outbuildings so I can move the buildings to a better place on my property. Can't do boat work because suppliers are down so may as well do property maintenance.
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Old 05-14-2020, 09:07 AM   #11
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I don't know the CFM rating. I'm not sure if it has one. The fan wattage was 500 watts.
500 watts?

Thats 4+ amps 120 VAC or 40+ amps 12 VDC. How many times per minute will that evacuate the air inside your galley? As A comparison, a 4" bilge blower has a 200 CFM rating. It will evaluate a room 7' x 8' x 7' every 2 minutes.

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Old 05-14-2020, 09:10 AM   #12
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When rebuilding Oz one of our goals was to decrease the humidity inside the boat. This was especially important because we cruise 4-5 months of the year in the temperate rainforest of SE AK and like to have guests and like to cook with propane. To help reach that end we installed a small (I believe it is 24") Broan 120v outside ducted range hood. In 14 years no problem and glad we did it. We also installed 9 double pane windows for all openings that didn't have sliders, hydronic heat and a high volume bilge fan in the head. So glad we did.

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Old 05-14-2020, 09:20 AM   #13
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This is on my to-do list. Following !!
We have a 12 volt unit in our small RV. Does a fine job. Noisey but it works.
RV has a propane cooktop/oven and the boat has just the cooktop.
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Old 05-14-2020, 09:48 AM   #14
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Quote:
Originally Posted by ghost View Post

For my gallery remodel last year I only found one 12v unit with decent specs. Mfg by Dometic, but not sold in the US. Eventually got a shady dealer in the UK to ship me one.
I've been trying to get someone to ship me one that may be (?) the same one! I don't know if the shady dealer is better than nothing but.... any tips? Or anyone else? I've seen it sold in the UK and Australia (tried both, but obviously not every possible source).

(BTW the ones I liked are models Dometic CK-150 (recessed) or CK-155 (more usual exposed hood style}. What I particularly liked about them is the fan is part of the "roof top" chimney/cap piece.)
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Old 05-14-2020, 09:55 PM   #15
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500 watts?

Thats 4+ amps 120 VAC or 40+ amps 12 VDC. How many times per minute will that evacuate the air inside your galley? As A comparison, a 4" bilge blower has a 200 CFM rating. It will evaluate a room 7' x 8' x 7' every 2 minutes.

Ted
Yeah something about like that. Like I said, it's and older mobile home unit. It does use a bit of electricity. I don't know the CFM rating. The hood is locked away in storage. It was pretty strong when it was in the mobile home. I am 5'8" tall and the unit was just above my head at maybe 6'. It had to be pretty powerful to suck air from nearly 30" beneath it. The fan isn't a concern as that can be changed easily.
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Old 05-14-2020, 10:05 PM   #16
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I'm planning to use a small 30" induction cook top with the hood, if I use the hood. I make a custom built hood and use the filter assemblies.


The cooktop in the link is for reference and the one I am planning to install. It's 40 amps max at 208/240 on the spec sheet. I won't ever use all four burners. At best I'll use the largest by itself or the two smaller ones. I won't be entertaining enough people to use all the burners at once, myself and a mate at best.



https://www.amazon.com/GE-PHP9030DJB...language=en_US
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Old 05-15-2020, 06:09 AM   #17
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Don't bother with the Dometic 12v RV Charcoal unit. I experimented with one before returning it. It was not able to cope with steam from a pot of boiling pasta water. I bet it only reduced the steam build up inside by ~20%. Windows were still fogged up.
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Old 05-17-2020, 02:04 AM   #18
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I've been trying to get someone to ship me one that may be (?) the same one! I don't know if the shady dealer is better than nothing but.... any tips? Or anyone else? I've seen it sold in the UK and Australia (tried both, but obviously not every possible source).

(BTW the ones I liked are models Dometic CK-150 (recessed) or CK-155 (more usual exposed hood style}. What I particularly liked about them is the fan is part of the "roof top" chimney/cap piece.)

The CK 500 is the one I got.
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Old 05-17-2020, 08:26 AM   #19
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I should have been clearer in my previous post. The Dometic CK2000 is the one that did not work well for me, as it has no possibility for external exhaust. I suspect a model CK500, with the external exhaust, would have worked just fine, if I'd been willing to cut a hole. So far, I have not come to the point where I want to do this. Workaround solution, for now, is to open some doors/windows while cooking.
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Old 05-17-2020, 08:30 AM   #20
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The P.O. owner installed a hood and fan before I got the boat. It vents straight up into a storage compartment under a seat on the F.B. I guess it would be a simple operation to vent it out of the storage area but we have never used it. Most of the cooking on our boat is a quick on and off, never use the oven. Steaks, burgers, chops, etc are done out back on the gas grill.

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