Rheem 97MDV060 Series - Page 26

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VENT PIPE SIZING AND MAXIMUM VENT LENGTHS (cont.)
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
Venting
(-)97VA060M317USA
(
-)97VA070M317USA
(-)97VA085M521USA
(-)97VA100M521USA
(-)97VA115M524USA
100
TABLE 3: MAXIMUM EQUIVALENT VENT LENGTH
* This is the recommended maximum number of long sweep elbows for either 2 or 3 inch pipe. Combinaons
of long sweep 90s, standard 90s, or 45s may be used, but the manufacturer recommends the use of long
sweep 90s whenever possible because the use of the maximum number of standard 90 and 45 elbows
only may result in nuisance furnace outages due to individual installaon specifics.
Exceeding the recommended maximum number of elbows may cause nuisance operaon of the pressure switch.
For modulating furnaces, non-direct venting is only authorized for
vertical terminations.