Aircraft fluid lines are usually made of metal tubing. or flexible hose. Metal tubing (also called rigid fluid. lines) is used in stationary applications and where long, relatively straight runs are possible. They are widely. used in aircraft for fuel, oil, coolant, oxygen, instru-. ment, and hydraulic lines. Flexible hose is generally. used with moving parts or where the hose is subject. to considerable vibration. Occasionally, it may be necessary to repair or replace. damaged aircraft fluid lines.
* Note excessive heat. If it's 90 degrees outside, the attic temperatures shouldn't exceed 110, according to home inspector Jamison Brown of AmeriSpec Home Inspection Services in Poquoson. However, more often than not, around here I find attic temperatures to be in excess of 125 on a 90-degree day, he says.
Average Cost to Install an Attic Fan. The average attic fan installation cost is $526. Homeowners report that most attic fan installation projects cost between $529 and $715. The minimum paid for such a project was $250, while the maximum reported cost was $910. The need for an electrician or roofer may increase the project cost.