Fantastic fan or maxxair ?
I’m contemplating replacing the original roof vent . The goals are less noise , less amps and reversibility. What’s the consensus ? Thanks
Forum Discussion
I went on the net to compare new designs and notice how differently fans are design.
It suppose to be common knowledge, that rotating blades/propellers having blades with changing radius do have different air speeds along the blade length.
That is why the blade suppose to have changing pitch, with pitch close to the shaft much bigger than pitch on the tip.
That law is routinely ignored in fan designs as doing proper blade is expensive, when not too many customers demand quality.
So what I noticed from fans on the market.
This is Dometic fan. You will notice that blades don't show much of changing pitch, while big diameter motor lowers air flow/efficiency as well.
Now this is MaxxAir fan.
You see pitch variation, where the blades look "twisted". This is proper design. Additionally smaller diameter motor gives better air flow.
There is more to fan design, so final outcome still depends on other factors, but those 2 are basic laws and theoretically MaxxAir should beat Dometic in performance hands down.
It suppose to be common knowledge, that rotating blades/propellers having blades with changing radius do have different air speeds along the blade length.
That is why the blade suppose to have changing pitch, with pitch close to the shaft much bigger than pitch on the tip.
That law is routinely ignored in fan designs as doing proper blade is expensive, when not too many customers demand quality.
So what I noticed from fans on the market.
This is Dometic fan. You will notice that blades don't show much of changing pitch, while big diameter motor lowers air flow/efficiency as well.
Now this is MaxxAir fan.
You see pitch variation, where the blades look "twisted". This is proper design. Additionally smaller diameter motor gives better air flow.
There is more to fan design, so final outcome still depends on other factors, but those 2 are basic laws and theoretically MaxxAir should beat Dometic in performance hands down.
