I am planning to build an air cleaner/purifier for my Hack-space as the air is very dusty. It's likely that I'll build a second one afterwards for extra capacity. But I need a fan to pull the air from 2 filters, but I'm having trouble figuring out which type of fan to get.
I want a rather quiet fan with a maximum air flow of 280-640 CFM. The diameter will probably be from 30-50cm. I want it to use a brushless DC motor, but I'll replace it if I have to. I will probably use an axial-flow fan, but tell me if there's a reason I should use a centrifugal fan instead. If I can't find the right large fan, I might resort to using two smaller fans (20-30cm).
I will probably not use a computer fan, as they are generally small and have weak air flow. However, they seem to be the only type of fan designed to be quiet. Computer fans are often below 25dB, while larger fans seem to almost-always be over 40dB (up to 72dB). As far as I can tell, most of the fans on Digi-Key are of this type.
I have found larger fans advertised as "automotive fans". They appear to be mounted easily like computer fans. However, they seem to always be rated for higher air-flow than what I want, while being loud. They're more expensive than computer fans, but some of them are just within budget.
The "box fans" appear to be made as appliances, not as a component for something else. They therefore look harder to mount, and I would imagine that they're heavier.
So what kind of fan should I look for? What search term should I use to find the fan that I want?
What kind of fans do appliance manufacturers use for heaters and purifiers?
I want a rather quiet fan with a maximum air flow of 280-640 CFM. The diameter will probably be from 30-50cm. I want it to use a brushless DC motor, but I'll replace it if I have to. I will probably use an axial-flow fan, but tell me if there's a reason I should use a centrifugal fan instead. If I can't find the right large fan, I might resort to using two smaller fans (20-30cm).
I will probably not use a computer fan, as they are generally small and have weak air flow. However, they seem to be the only type of fan designed to be quiet. Computer fans are often below 25dB, while larger fans seem to almost-always be over 40dB (up to 72dB). As far as I can tell, most of the fans on Digi-Key are of this type.
I have found larger fans advertised as "automotive fans". They appear to be mounted easily like computer fans. However, they seem to always be rated for higher air-flow than what I want, while being loud. They're more expensive than computer fans, but some of them are just within budget.
The "box fans" appear to be made as appliances, not as a component for something else. They therefore look harder to mount, and I would imagine that they're heavier.
So what kind of fan should I look for? What search term should I use to find the fan that I want?
What kind of fans do appliance manufacturers use for heaters and purifiers?
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