recirculating vs. vented hood

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Hi. I am almost done with my kitchen remodel. I bought a Zypher Sienna hood which is finally ready to go in... The problem is that we will have to run the vent through a floor into the top floor and then up and out the roof, building a box around the vent on the top floor. Toay I discovered that one can get a kit to convert the hood to a recirculating one. This would save a tremendous amount of work and be aesthetically much better, Does any one have experience with this recirculating option? Does it work well? Does it blow hot air back nto the kitchen?

Your advice is most welcomed. THanks! เว็บพนันยูฟ่าเบท