Qt = Total air flow of Dust collector. Q1 = Air Flow in first area. Q2 = Air Flow in second area. etc. Static Pressure is a loss due to the air flow pressure pickup area to exit the dust collector system.The pressure loss can occur in the suction, ducting, elbow and cyclone. Calculation of static pressure is based on the duct size.t = Total air flow of Dust collector. Q1 = Air Flow in first area. Q2 = Air Flow in second area. etc. Static Pressure is a loss due to the air flow pressure pickup area to exit the dust collector system.
What is the average cost per square foot to install roof? It depends on the type of roof. A single story low pitch asphalt shingle roof will cost around $40 - $80 per square (100 sq. ft.) to tear off and $75 - $100 per square to inst â¦ all new shingles.If the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced.hat is the average cost per square foot to install roof? It depends on the type of roof. A single story low pitch asphalt shingle roof will cost around $40 - $80 per square (100 sq. ft.) to tear off and $75 - $100 per square to inst â¦ all new shingles.
It depends on the type of roof. A single story low pitch asphalt shingle roof will cost around $40 - $80 per square (100 sq. ft.) to tear off and $75 - $100 per square to install new shingles. If the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced.Some contractors charge for flashing chimneys ($150 - $300) and pipes ($25). All labor performed on steep pitch roofs (7/12 and higher) will be about 10% or 15% higher. Two story housed may be 5% to 10% more.Other types of roofing have a wide range of prices. It really depends on which state you live and how steep the roof is and how many roofs already are on the house.f the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced. Some contractors charge for flashing chimneys ($150 - $300) and pipes ($25). All labor performed on steep pitch roofs (7/12 and higher) will be about 10% or 15% higher.