POWER SWITCH TRANSISTOR-The part responsible for switching off the primary circuit that causes high voltage induction in the secondary winding in an electronic ignition system. PRIMARY SPEED SENSOR-An engine speed sensor located inside the actuator housing on the back of the injection pump.
Costs for green roofs in the United States are estimated to average between $15 to $20 per square foot for all use types, i.e., high density residential, commercial, industrial etc.1 These costs include all aspects of green roof development, from the waterproofing membrane to soil substrate creation to planting.
The most common type of roofing material is asphalt shingles, which cost between $120 and $400 per square. You'll also need to pay for flashing, trim, vent covers and gutters to complete the project. It's possible to keep costs down by shingling over an existing roof, rather than replacing it.