Rinnai 224042 Universal Bug Guard

Rinnai 224042 Universal Bug Guard

Designed to prevent bugs from getting into the fresh air intake to the heater's blower and combustion chamber. The center hole in front is the for exhaust portion of the assembly. Insects cannot enter the unit through the exhaust opening. The intake portion of the assembly is the outer ring area where the bugs and insects can enter.

Rinnai's unique Ubbink concentric venting system is easy to install and offers the best in performance and safety. Compatible with all indoor Rinnai water heaters, except the 98 series which uses separate intake and exhaust vents.

Available concentric water heater vent fittings

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If your vent pipe is the Rinnai single intake/exhaust then this fits just under the pipe's cap. Instructions come in the kit. I used tape to attach strips of fiberglass screen inside of the louvres to keep out small bugs.