What blower to buy?

[cmedsailor]

http://www.plastimo.com/en/powerboa...ation/ventilateur-de-cale-classique-9710.html

I currently have a plastimo electric blower that need to replace after 2500 hours of work. It makes lots of noise (it's always on when the engine is running) and it's time for a new one. I have the 12V / 4amp version.
I am wondering whether to buy the same again or seek for another brand. The only issue with this specific one is the noise. It was noisy since I bought the boat 7 years ago, despite two "services" (cleaning etc) and would prefer something more quiet. Any suggestions?
Thanks

 

[pvb]

I've got a Rule 4" inline blower, which is on whenever the engine's running. It's quiet, but it's only done about 100 hours so far.

 

[cmedsailor]

Thanks pvb. But the inline blowers require a different installation, so I think it's probably better not to follow this option.

 

[cmedsailor]

I have just found out that I can replace it with an Osculati blower. The difference though is that the Plastimo has an output of 150m3/hr whereas the Osculati 260m3/hr. Does it matter if it extracts more hot air from the engine room? Will that mean less air for the diesel engine to use (as far as I know diesel engines need quite some air to be able to work properly)?

 

[Laundryman]

I've got a Rule 4" inline blower, which is on whenever the engine's running. It's quiet, but it's only done about 100 hours so far.

Can I ask, why you have a blower and are you blowing air into the engine compartment or hot air out please? My 2020b tends to run hot at full revs and I was wondering whether a blower removing the hot air might help. Thanks Alan

 

[pvb]

Can I ask, why you have a blower and are you blowing air into the engine compartment or hot air out please? My 2020b tends to run hot at full revs and I was wondering whether a blower removing the hot air might help. Thanks Alan

It was fitted as standard by Bavaria - I guess they plan for boats being used in warmer places than the UK! It sucks hot air from the upper part of the engine compartment, the duct exits the boat at the port side of the transom area. There's another duct, from the starboard side of the transom area, which brings cool air in at the bottom of the engine compartment.

 

[aluijten]

Thanks pvb. But the inline blowers require a different installation, so I think it's probably better not to follow this option.

Apart from that I found out the in-line blowers are much less efficient as the angled ones. I replaced a in-line one with a angled one and with less current consumption I've got much better output.
I've used a Jabsco one, similar to the ones on this page:http://www.downwindmarine.com/Jabsco-Flexmount-Ventilation-Blowers-p-91001610.html

The main reason to have one is to remove excessive heat from the engine compartment (Volvo MD2040 engine). Do make sure there is enough capacity to feed fresh air though. But that is normally not a big problem.

 

[pvb]

Apart from that I found out the in-line blowers are much less efficient as the angled ones. I replaced a in-line one with a angled one and with less current consumption I've got much better output.
I've used a Jabsco one, similar to the ones on this page:http://www.downwindmarine.com/Jabsco-Flexmount-Ventilation-Blowers-p-91001610.html

Well, I'm not sure they're much less efficient. The Rule 4" inline blower is rated at 6.7 cu metres/min, whereas the 4" Jabsco you linked to is rated at 7 cu metres/min - hardly a huge increase. As for less current consumption, the Rule draws about 5A, and the Jabsco draws a massive 12A. So maybe the inline blower you replaced was a particularly bad example.

Importantly, the angled blowers aren't usually intended for continuous use, whereas the Rule inline blower is rated for continuous duty.

 

[30boat]

Well, I'm not sure they're much less efficient. The Rule 4" inline blower is rated at 6.7 cu metres/min, whereas the 4" Jabsco you linked to is rated at 7 cu metres/min - hardly a huge increase. As for less current consumption, the Rule draws about 5A, and the Jabsco draws a massive 12A. So maybe the inline blower you replaced was a particularly bad example.

Importantly, the angled blowers aren't usually intended for continuous use, whereas the Rule inline blower is rated for continuous duty.

I have a Taiwanese copy of a Jabsco that's used continuosly.It's now 12 years old and still as noisy as when new.

 

[aluijten]

Well, I'm not sure they're much less efficient. The Rule 4" inline blower is rated at 6.7 cu metres/min, whereas the 4" Jabsco you linked to is rated at 7 cu metres/min - hardly a huge increase. As for less current consumption, the Rule draws about 5A, and the Jabsco draws a massive 12A. So maybe the inline blower you replaced was a particularly bad example.

Importantly, the angled blowers aren't usually intended for continuous use, whereas the Rule inline blower is rated for continuous duty.

Yeah that is true when you read the sticker on the blower, but that is all specified with no hoses attached. As soon as the blower meets any form of resistance the inline version will dramatically lower its output. The angles one works much better in that respect. The ones I compared were both from Jabsco. The angled one I used was 4 or 5 amps if I remember correctly, for sure no 12Amps.