Brian Leavitt
08-27-2015, 4:42 PM
Howdy Fellas,
Reading another recent post about exhaust got me wondering about stuff...
We are moving in a couple of months and this gives me a good opportunity to upgrade my exhaust system to something with more appropriate airflow. The problem is I have no clue how to calculate this all out, so maybe you all can help with this.
The basic setup will have to remain as I have it now except for two things. I can run a larger main pipe, if needed, and the blower can/will be larger. What I have now is all three lasers being exhausted by a single, roof-mounted blower. All three lasers have two 4" exhaust holes and all are attached to "Y" pipes coming off the main 6" rigid pipe. This 6" pipe goes up 24 feet and then over 10 feet where it exits the roof. Apparently the regulations here require that the blower be at least 10 feet from the edge of the roof.
The Universal books state that 500cfm at 6" sp is required. The Epilog book states that 650 cfm is required, but doesn't state at what sp. So that's two lasers requiring 500 cfm @ 6" sp, and one requiring 650 cfm @ unknown sp. Combined, that's 1650 cfm, but I don't know if it's that simple when looking at blower ratings - especially considering the distance from the lasers to the blower.
I need to keep exhausting all three with a single blower, but I don't know what to get. There is still going to be 34-40 feet of pipe between the lasers and blower at the new place, but I can increase the size of the pipe if needed. Is this enough info for anyone to offer a suggestion on a blower?
Thanks,
B
Reading another recent post about exhaust got me wondering about stuff...
We are moving in a couple of months and this gives me a good opportunity to upgrade my exhaust system to something with more appropriate airflow. The problem is I have no clue how to calculate this all out, so maybe you all can help with this.
The basic setup will have to remain as I have it now except for two things. I can run a larger main pipe, if needed, and the blower can/will be larger. What I have now is all three lasers being exhausted by a single, roof-mounted blower. All three lasers have two 4" exhaust holes and all are attached to "Y" pipes coming off the main 6" rigid pipe. This 6" pipe goes up 24 feet and then over 10 feet where it exits the roof. Apparently the regulations here require that the blower be at least 10 feet from the edge of the roof.
The Universal books state that 500cfm at 6" sp is required. The Epilog book states that 650 cfm is required, but doesn't state at what sp. So that's two lasers requiring 500 cfm @ 6" sp, and one requiring 650 cfm @ unknown sp. Combined, that's 1650 cfm, but I don't know if it's that simple when looking at blower ratings - especially considering the distance from the lasers to the blower.
I need to keep exhausting all three with a single blower, but I don't know what to get. There is still going to be 34-40 feet of pipe between the lasers and blower at the new place, but I can increase the size of the pipe if needed. Is this enough info for anyone to offer a suggestion on a blower?
Thanks,
B