Help on choosing new fan type please?

RedWhiteBlueGreen said:

I've always been lucky enough (and not big time enough!) to need exhaust fans & filters so never bought one of my own, though in my current setup i am going to need one.

So was wanting to ask people's advice on the 3 i seen below on which they think would be best for quietest running and efficiency relative to price? And more to the point, is paying more for so-called silent fans actually worth it?! Noise reduction is my main consideration though, followed by durability - i need about 450CFM for my tent and likely going with 6" acoustic ducting.

(I didn't wanna post links to site i seen these on so as not to be naughty, so have C&P'd descriptions & pic, if that's ok? Any advice on your choice and why would be greatly appreciated! Thanks in advance!)


View attachment 3923027

£90.00 – Unknown make
- EC: Electrically commutated fan motor.
- Metal Fan Casing
- Quality and fireproof PBT impeller.
- Designed like a jet engine - dual impeller.
- High static air pressure.
- Up to 50% lower energy consumption.
- Speed control: fully adjustable fan speed.
- Heavy duty 6mm NMB bearing.
- Over current protection and auto-reset.
- Working temp: -20˚C - +60˚C
- IP Rating: IPX 4
- Fireproof grade: UL94V-0
SE-A150
- 6" / 150mm duct sizing
- 30W input power
- 300CFM - (lower CFM than i want but could live with if quietest!)


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£100.00 - Rhino Thermostatic
The fans are easily installed and removed and come with an easy to fit mounting clamp. Rhino Fans come hard wired and are ready to be used from removal from the box.
• Speed-controllable
• Can be installed in any position
• Maintenance-free and reliable
• Inclusive mounting bracket
• thermostatically controlled
Ratings:
• 4": 280 Max Airflow m3/h
• 5": 400 Max Airflow m3/h
• 6": 760 Max Airflow m3/h



View attachment 3923029

£160.00 – Envirovent Silent MV
Presenting the world’s quietest in-line fan range in their class, the SILENT MV range creates a quantum leap forward in technology to improve the acoustic performance of up to 12 dB(A) compared with similar products on the market. Features & Benefits Sound absorbent insulation 360° rotating connection box Sealed for life ball bearings Fitted with a two speed motor IP44 rated Five year guarantee Incredibly silent running High performance Complies with building regulations Easy installation Easy maintenance. Following extensive aerodynamic testing, we have been able to not only reduce the amount of noise produced, but also ensure that the noise level that is actually emitted is at a far lower frequency, providing a quiet and ambient environment. By installing the SILENT MV, you will never experience the disturbance of noisy ventilation again. Ultra quiet and low profile helicocentrifugal in-line fans suitable for a wide range of domestic and commercial applications. Fitted with sound absorbent insulation and manufactured with an adjustable two speed 230V 50Hz motor*. Easy to install and maintain, the SILENT MV fans guarantee exceptional performance with significant noise reduction.
SILMV500/150 (6") – 430cm3 (Low) / 580cm3 (High)

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coreywebster said:

Rhino are relatively new to the market, but have a good name so don't imagine they will be low quality.
However a speed controller like that will make a hum when turned down. Which will be a problem if noise is an issue.

A Ruck or rkv might be better with the addition of a variac speed controller, both combined would be about the same price, maybe a few quid more..

The bottom fan looks like an S and P with a different name. I hear good things about them, but not used one.

You should see what other folks say too but I would also look at squirrel caged box fans, they are pretty quiet, they have a really good Db ratting.

If noise is a concern then go a size bigger and turn it down with the right sort of speed controller, a variable transformer (variac)

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