Paige Furnace service Upon my arrival I performed a 6 month checkup on 3 straight electric heating systems. Flushed and treated the water removal systems, replaced the air filters, checked temperature rise, checked all wire terminals then verified system safety and performance. I found that Unit #1 needs the heat transfer media coil and air circulation system chemically cleaned, Unit #2 needs the heat transfer media coil and air circulation system chemically cleaned, an auxiliary float safety switch added at the secondary drain port and a vent pipe installed after the P-trap, Unit #3 needs the return air plenum replaced, the heat transfer media coil and air circulation system chemically cleaned and a vent pipe installed after the p-trap. Will email over all repair options and advised on using better filters for the system.