At 02:15 hours, Station 71 along with surrounding mutual aid companies were dispatched to 219 Falmouth Road for a reported Dwelling fire.  Deputy 71 (Mohr) marked up and was advised by county that the resident reported the house being full of smoke and that PD was on scene confirming the report.  Engine 7-1-2 (Asst. Chief Stoner) and Deputy 71 arrived and began investigating the source of the smoke.  Engine 7-4-2 arrived and assisted with investigation.  Crews found the cause to be from a furnace malfunction.  Deputy 71 had all units to continue in non-emergency and stage at the Conoy Township Building.  Crews from 71 and 74 ventilated the structure.  Deputy 71 placed the box in service at 02:53 hours.