Contact Address: 1012 West 9th Ave King of Prussia, PA 19406 Phone: 215-458-1900 Visit Our Website About A fire alarm system is a requirement for most commercial properties. At Fire Alarm Installation Systems, our trained fire alarm engineers and installers have the technical experience to make sure your fire system is installed exactly as required, on schedule and within the correct budget estimate. Invision is the sure way to get your fire plans approved without re‐submitting that cause construction delays. Our trained fire alarm engineers and installers have the technical experience to make sure your fire system is installed exactly as required, on schedule and within the correct budget estimate. Fire Alarm Installation Systems is experienced in designing and getting your plans approved without re-submittals that can cause construction delays and cost more money. Our team will submit plans, file permits and provide you with a comp