Performed 2 system heating tuneup. Upstairs furnace older and needs surge protector to keep more costly parts from electrical damage. Changed filters. Flushed drain lines and added bleach tablets. Tested heating on both systems for proper operation. Both units have been tested for combustion calibration. Upstairs a/c unit older and still uses r-22. Both systems operating normal at this time. Recommend adding u/v lighting system to each supply plenum to kill any possible mold and bacteria in ductwork as well as improving air purity.