Service Technician called to let me know when he was arriving. He put on protective booties and proceeded to check Heating system. He stated that the system is a MERV 10 and the filter that is being used is a MERV 14 which overtime can damage the system. He recommended to use the Nordic Pure filter either MERV 6 or 8 it is not paper it has fibers which catches more dirt and can be bought on Amazon.
