Hello,

first time to post here. we are a small manufacturing shop. we have four lasers two of which we are running and 2 are not hooked up yet. This is a large site so you may have already covered this hoping for some direction to threads or ideas. Our problem is not exhausting but the make up air. we are in a 1550 sq ft pole barn and with 4 lasers going we will need some kind of heat ex-changer to bring in the make up air. We have a 500 watt fiber laser. 2 150 watt co2 lasers and 1 100 watt co2 laser. we currently are exhausting with 6 inch metal duct pipe on the 500 watt and the 100 watt. with the cold weather coming we will need to bring in that cold air and need some way of heating it.