Rinnai RH180 Installation Fundamentals page 43

Maintenance – Intake air filter
• The RH180 is a fan assisted
water heater. Intake air is
drawn into the appliance from
the surrounding area.
• To maintain optimum
performance, periodically clean
the air filter. Do not operate unit
if the filter is not in place.
• A dirty air filter could result in
codes 05, 10 or 13 being
posted on the temperature
control panel. See manual for
details.
43