Ventilation or aircon?

[jfm]

, your boat is a single engine displacement boat.

You're gonna get detention for that Deleted User. Mapis's engines, both of them , may well have more kg of cast iron in them than yours

Seriously though, @boatmike, this is a valid point: the engines are hot lumps of cast iron and after an hour's running they can soak heat into the accom for several hours. Likewise the fuel (which is part of the engine's cooling system): depending on how much fuel you have and the location of the tanks it might make sense to fit fuel coolers - you'll notice the fuel heat after several hours running rahter than an hour's running though. I have return fuel coolers and DougH has his main fuel tank under the bed so he needed to fit them

 

[DougH]

I have return fuel coolers and DougH has his main fuel tank under the bed so he needed to fit them

Bootiful now they have been fitted.

Expensive but worth every penny, (MAN 900 Engines)

 

[MapisM]

Likewise the fuel

Good point.
I forgot to mention it before, but I explained my experience with fuel coolers in you epic Sq78 thread.
The post I'm talking about is this one, if boatmike is interested to have a look.

 

[Deleted User YDKXO]

Ermm... not according to my avatar!

Ooops sorry, I shouldn't make assumptions

Anyway, yep, also the type of boat is a factor, and I did mention it.
On mine, the lumps of iron which radiate heat long after they're turned off, on one hand are below a thick wood deck - which I suspect makes more difference than the engine size, and otoh I leave the e/r blowers on well after arrival - which helps cooling the e/r temp much more quickly, and in turn leaves the saloon cooler.

Yup, do that myself every time although it doesn't seem to make much difference on my boat

Not to mention - heaven forbid - leaving the genset on! Don't your raggie neighbours kill you for that?

One of my favourite things. I love to watch them sweat from the cool of my saloon

 

[Deleted User YDKXO]

You're gonna get detention for that Deleted User. Mapis's engines, both of them , may well have more kg of cast iron in them than yours

Already standing in the corner with my pointy hat

 

[DougH]

otoh I leave the e/r blowers on well after arrival - which helps cooling the e/r temp much more quickly, and in turn leaves the saloon cooler

What a good practise MapisM, that never occurred to me.

Thanks for a good tip.

 

[MapisM]

do that myself every time although it doesn't seem to make much difference on my boat

Have you ever checked if your blowers work correctly?
I mean, in a typical installation there are two couples of blowers, fitted in the forward and in the aft part of the e/r respectively. But on each side, one of them should suck air in and the other one should blow it out.
I've seen (even on brand new boats!) blowers which were all working in one direction (usually blowing out), but of course the air exchange is much better with a proper installation.

 

[John100156]

On the F43 return air is taken into the units at low level saloon then each of the two units blows out saloon/aft cabin and dinnete/forward cabin? It's true a centrifugal fan blows when reversed but the air flow is a lot less. What is even more interesting is the current drawn by a fan motor when the outlet is blocked actually reduces, had to prove this in a workshop one day to an AC engineer would you believe.

 

[vas]

What a good practise MapisM, that never occurred to me.

Thanks for a good tip.

+1

actually I don't even have e/r mech. vent!
I do have big grills above deck to suck air in and there are nice large vents for the pulling of hot air out below deck at the aft of the e/r. Only it seems there were never fitted with mechanical vent. I wonder if that's normal for 70ies craft? Not to mention I always thought that e/r vent is for petrol powered crafts!
Yet another opportunity for improvements...