Aft Head Vent Blower (Circuit Breaker Tripping)

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Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Sat Nov 11, 2017 11:27 am

Does anyone know if this is 3" or 4" vent blower (actually it is a suction "fan" that vents the aft head thru a approximately 3" typical AC outlet duct but is pulling air out of the head, not pushing air into it. I would like to purchase a "blower" prior to going to the boat to see what size it is. Will save one trip to the boat if I have a idea of the size of the "blower"
Thanks
Last edited by gofast24 on Wed Nov 15, 2017 11:34 am, edited 1 time in total.
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Mon Nov 13, 2017 10:26 am

I was hoping that some of you guys with a larger vessel would have some idea of the size of the aft head vent fan (inline blower) so I can purchase either a 3" or 4" blower prior to going back to the 4160 to actually see what I need, than back home, then ordering one, then back to put it in.

Thanks for any info on this subject!
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby MyPleasure » Mon Nov 13, 2017 11:13 am

Mine is a 3" I have a 07 3760....this picture is the duct behind the galley cabinets.......Rick
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby MyPleasure » Mon Nov 13, 2017 11:46 am

attempting to re-post better picture
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Mon Nov 13, 2017 12:07 pm

Thanks Rick!
Our aft head (and vent) is on the port side of the boat, has to be accessible from the engine room, I hope! Our galley and cabinets are on the starboard side but happy to get your response! Searching the web (Amazon) all the blowers (3" and 4") have reviews indicating they are very noisy but as the aft head vent fan is hardly ever on (unless someone is taking a shower) not too worried about the noise. Anyone have a recommendation for a "quiet" fan? Our two engine room blowers are always automatically turned on when starting and running the gen set. One is very noisy, the second fairly quiet. The noisy one is a PITA if running the get set at night while on the hook to run the AC's. As that doesnt happen often but would still like to replace the "noisy" one along with the aft 3" vent fan.
Thanks again!
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby cbsmith » Mon Nov 13, 2017 12:28 pm

Not sure about marine blower fans but in other fan applications usually the more the fan costs the better built and quieter it is. Cheaper fans can use cheaper bearings or bushings instead and blades that are not as aerodynamic and make more noise, as well as move less air.
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby MyPleasure » Mon Nov 13, 2017 2:27 pm

I want to change mine but as you can see its not accessible at all unless I want to beat it with a stick....I would love to use a drum type (hamster wheel) fan rather than a propeller type which I have and its not isolated from the hull....its directly fastened to that backing material that is glassed in....If Regal only had located the fan motor where my hot water tank and vacuum flush filter is that would have been perfect. Another note mine is 12 volt for usage while not plugged into shore power....I hope yours is in the engine compartment...keep me posted....Rick
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby Chris_in_Texas » Mon Nov 13, 2017 9:19 pm

Something to note at least on my two cruisers, is that the fan just terminated between the hull and inner liner, they didn't actually run them outside the boat. Kind of like running the bath fan into the attic. Kind of a waste really pumping all the fragrance or moisture around the boat. :mrgreen:
Thanks, Chris

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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Tue Nov 14, 2017 11:22 am

Chris_in_Texas wrote:Something to note at least on my two cruisers, is that the fan just terminated between the hull and inner liner, they didn't actually run them outside the boat. Kind of like running the bath fan into the attic. Kind of a waste really pumping all the fragrance or moisture around the boat. :mrgreen:

Agree with cbsmith, you get what you pay for! Too bad there isnt a bilge blower (actually a inline fan) with ball bearing motors. I would be happy to pay 50% more for one with real double sealed ball bearings in it!
Chris, agree, its like venting your home bathroom into your bed room (well, almost)! Back when I was still living in MKE (31 years ago) and sub zero out side temps our master bath ceiling vent fan discharged in to our attic! When going into the attic you could see all the water vapor that discharged into the attic as a large frozen blob of ice on the roof joists and roof sheathing! Finally put in a sofit vent discharge in so the vent fumes would discharge out side vs. the attic. PS: Just ordered a 3" Shureflo fan from Amazon,$26.99, hope it is actually a 3" fan that I currently have. If not, will just have to order a 4" version. If you read the comments section on this fan most complaints are "noisy", but we only use it when taking a shower or a #2 in the toilet :)
Thanks again guys for your comments!
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Fri Nov 17, 2017 11:17 am

Just received the ShurFlow 3" inline blower, $26 from Amazon. Tested it, it does a good job regarding the volume of air (free flow) but sounds like a turbocharger compressor inlet. As it will just be used for the aft head vent circuit it wont be on for more than 5 or 10 minutes or so, my son said he likes to hear when something is on so he remembers to turn it off? Kind of like when the VP 8.1's are running he can't remember to turn them off, kids:)
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Mon Nov 20, 2017 11:38 am

Got in to the engine room yesterday, it is definitely a 3" inline fan which I already bought per the advise from mypleasure, thanks!
If I can actually figure out how to attach a picture I will try it again in this post = (Tried to attach it, says file is too big?? How do I shrink it down to something that isnt as clear for anyone to see anything just to post it in the forum? The jpg is only 1.97 Meg?
Thoughts?
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby kellyg » Mon Nov 20, 2017 12:57 pm

You can try Resizeimage.net
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby Rpontual » Mon Nov 20, 2017 2:39 pm

kellyg wrote:You can try Resizeimage.net


You can also send an email to yourself using a mobile phone and pick lower quality when asked.
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Tue Nov 21, 2017 10:38 am

Thanks guys!
My cell phone is a old Blackberry my son gave me some years ago, it just makes and receives phone calls. At my age I dont really need a "Smart" phone, jsut one that rings on a incoming call and sends a outgoing call (Ya, I am from the old days, had vacuum tube theory class my first year in college :). Anyway, the picture that my son took on his new iPhone 8 or 10, dont remember) just shows a inline 3" blower (fan) and it will replace the current fan perfectly so a picture is just nebulous (not informative). Next fix will be the leaking dock water check valve that we discovered Sunday while checking out the aft head vent fan problem in the engine room. I have a picture of it also but dont want to go thru the long process of trying to reduce its size in order to post it? I think the next pictures I take will use my old Blackberry phone which has about 1/2 the resolution and file size as my son's iPhone. I am still wondering why the ROF server wont accept high quality photos?
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Thu Nov 23, 2017 11:01 am

Thanks, I figured out how to reduce the .jpg size from 2.3 meg (from my son's iPhone 8) to about 260k so here is the pic of the discovered aft head inline vent fan that was siezed up and causing the breaker in the salon to trip, for what it is worth=
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby kellyg » Thu Nov 23, 2017 7:17 pm

Did place insulators between the vent and boat structure?
Glad you were able to post a picture.
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Fri Nov 24, 2017 10:47 am

kellyg wrote:Did place insulators between the vent and boat structure?
Glad you were able to post a picture.

Thanks Gary. No, havent installed the new 3" inline fan yet but as the thing is only running 10 or 15 minutes or less agree with my son that it is beneficial to hear it running in order to remember to shut it off (There is a switch in the aft head that turns on the head ceiling light and also the vent fan if the vent fan main breaker is turned on). It is interesting that head fan has a circuit breaker in the main breaker panel in the salon but no breaker for the main engine room blowers (2X)? One of the engine room blowers is being naughty and making a lot of noise and when ever running the gen set both the blowers automatically kick in when ever the gen is running, to me, this means the engine room blowers need to be rated for continuous duty.
Thanks
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby kellyg » Fri Nov 24, 2017 11:10 am

That's strange, on my boat have a circuit breaker for each engine room blower. located on the panel.

I see your point as far as hearing the vent running. If I didn't hear mine, it probably would run all the time.
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby gofast24 » Fri Nov 24, 2017 11:24 am

Thanks Gary!
When you say "panel" is it the main AC/DC breaker panel in the salon (where ours is for the aft head vent fan) or the multiple little push to reset breakers with rubber boots over them located just below the helm? The "quiet blowers" you mentioned have to be the main engine room ventilation "blowers", probably squirrel cage type with ball bearings and not a lot of hours on them?
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Re: Aft Head Vent Blower (Circuit Breaker Tripping)

Postby kellyg » Fri Nov 24, 2017 11:30 am

My breakers are located in the Main Breaker Panel, located in the salon.
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