Arrived at our clients home for a 2 system heat maintenance inspection. Our client provided air filters to be replaced today. Once replaced I proceeded to test, clean, and inspect both furnaces. I smelt gas and while preforming our bubble test I found a small amount of gas leaking from a flare fitting. I showed a video to our client and immediately took care of it before further testing and checking the unit. Everything else passed inspection today. I then proceeded into the walk in attic and also tested the fire shut off safeties and ensured the unit was safe. Both upstairs and downstairs units are without surge protection and I did discuss this with our client. We also discussed attic insulation because it is very low and missing in areas on both attics. She would like a consultation visit for attic insulation in the home. Both units are ready for the remainder of winter.