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.
This puts an average roof at $14,000 to $12,000. Natural slate is one of the most expensive roofing materials, but can raise the value of a home due to its character. It costs about $25 to $35 per square foot installed, or a total of $50,000 to $70,000 for the average roof.