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trevorharris 06-02-2019 07:07 PM

Solar Ventilation
 
Hey all,

I have a Mirage 27' that I'll be living on for the summer. I'm looking to better the ventilation as there is currently nothing on board. I've been looking at the solar vents and I'm hoping someone else has experience with these and could help me.

First, For the size of my boat, would a 3" or 4" be recommend?

Second, should I set it up to blow air in, or suck it out? I'm hesitant to set it up to suck air out because I don't want it to draw air from the engine compartment.

I know that there is more that I could do. Ideally, I'd have two of these, one perhaps blowing in the vee birth hatch, and the other sucking out (in the main cabin). However, I'm going to do this one step at a time.

Alternatively I could have some passive vents with the solar blowing out, I suppose.

Anyway, just bouncing around some ideas and seeing what people have to say.

paulinnanaimo 06-02-2019 07:20 PM

Re: Solar Ventilation
 
I assume that you wouldn't be relying on this for ventilation while the motor is running, would you?

trevorharris 06-02-2019 07:56 PM

Re: Solar Ventilation
 
no, I actually replaced the proper blower for that today because the previous one was sounding a little squeaky. This upgrade described here is just for moisture/cooling purposes.

paulinnanaimo 06-02-2019 08:33 PM

Re: Solar Ventilation
 
But you stated that you don't want it to suck air out of the engine compartment, what is the problem if the motor isn't hot?

trevorharris 06-02-2019 08:47 PM

Re: Solar Ventilation
 
The engine compartment is just a smelly place. If I'm sucking air out of the saloon, it has to come in somewhere. Some will come in from the companionway as it's not perfectly sealed, but I fear some would also come from the engine compartment as well.

SeanM26 06-02-2019 11:22 PM

Re: Solar Ventilation
 
Those are really small and will not move many CFM. How hot is it where you are at?

Uncle Bob the 1st 06-02-2019 11:33 PM

Re: Solar Ventilation
 
Quote:

Originally Posted by trevorharris (Post 2051606116)
Hey all,

I have a Mirage 27' that I'll be living on for the summer. I'm looking to better the ventilation as there is currently nothing on board. I've been looking at the solar vents and I'm hoping someone else has experience with these and could help me.

First, For the size of my boat, would a 3" or 4" be recommend?

Second, should I set it up to blow air in, or suck it out? I'm hesitant to set it up to suck air out because I don't want it to draw air from the engine compartment.

I know that there is more that I could do. Ideally, I'd have two of these, one perhaps blowing in the vee birth hatch, and the other sucking out (in the main cabin). However, I'm going to do this one step at a time.

Alternatively I could have some passive vents with the solar blowing out, I suppose.

Anyway, just bouncing around some ideas and seeing what people have to say.


Hi, I have 3 on my 32 footer, 2 pushing air in and one sucking out. No smells or mould at all on the boat. When I bought the boat it had the three already fitted but they were old nicro that were falling apart so I thought, yeah replace like with like, WRONG, the later nicro really are in my experience absolute POS. Look for something that is fairly well constructed and if possible find creditable product reviews. Rant over. :grin
Anyway, to answer the question, yes they do work but you will need at least two. I have 3 inch size on mine.

fallard 06-04-2019 12:46 AM

Re: Solar Ventilation
 
My boat has two 3Ē Nicro fans pulling air out of the head and galley, respectively. There are 2 more 4Ē Nicro fans pulling air out of the lazarette, which is connected to the quarter berths via screened ports. There is a proper electric fan to ventilate the engine compartment.

Iíve replaced the Nicro fans over the years, and the original NiCd batteries donít last forever. Donít know if the new one use better batteries. I have no complaint about the Nicros, unlike a previous poster. Weíve had the Nicros for 23 years.

I rely on the Nicros to keep air moving and minimize boat mold, odors,and help remove moisture when cooking, but they are not appropriate for cooling. For cooling you would need to use regular 12 V fans, such as Caframos

paulinnanaimo 06-04-2019 09:40 AM

Re: Solar Ventilation
 
Sorry to waste your time, I didn't think about engine odours being a problem. But I'm curious. Is this ventilation to cool in the summer or for removing condensation in the winter?

trevorharris 06-04-2019 10:00 AM

Re: Solar Ventilation
 
Its never a waste of time talking about boats :-)

its moreso to cool in the summer. When I leave my boat for 6 hours or so its quite warm inside. I'm just looking to get a little bit of air circulation while I'm not there and the companionway is closed.


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