Rinnai Water Heater REU-V2520FFUD - Manual (Page 35)

NOTE: Provisions must be made to prevent the condensate from entering the water heater.
Without proper drainage or disposal condensate will damage the heat exchanger.
Horizontal Venting with a
Condensate Collector
Horizontal Venting without a
Condensate Collector
Condensate
Trap
Vertical Venting
(condensate collector required)
Maximum Height
5 feet
3 in
min
3 in
min
3 in
min
Regions of cold climate will create
more condensate in the vent
system. A condensate collector is
recommended in cold climates.
If more than one elbow is used
in the vertical section you must
use a condensate collector.

Rinnai America FF Models
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S
Venting
Condensate
Condensate formation can occur in Category III direct vent appliances.
• Vertical terminations must incorporate a condensate drain and trap as close as possible to
the appliance.
• The condensate trap must contain a minimum of 3" of water.
• Dispose of condensate per local codes.
• Slope horizontal venting 1/4 inch per foot either towards the heater with a condensate
collector or towards the exhaust terminal.