Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 8.2%o2 23 ppm co 0 smoke While performing the maintenance we found 2 hi-vents that had leaked in the past and have some minor corrosion on them. Recommend replacing the hi-vents at some point in the future. Recommend having a chimney person come out and inspect the chimney. We found a couple leaves in the flue pipe. Greg’s chimney 203 630 1976