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The Home Energy Rating System (HERS) Index is the industry standard by which a home’s energy eciency is measured.
A lower HERS Index Score means a more energy-ecient home, which means lower energy costs.
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4-9 PTS
5-7 PTS
5-7 PTS
5-7 PTS
3-4 PTS
5-8 PTS
5-8 PTS
3-5 PTS
4-5 PTS
3-4 PTS
6-9 PTS
2-3 PTS
6-9 PTS
5-8 PTS
5-7
PTS
0
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2
3
4
5
6
7
8
9
10
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12
RUR199i / RUR199e / RU199i / RU199e
RU180i / RU180e
RU160i / RU160e
RU130i / RU130e
RU98i / RU98e
RL94i / RL94e
RL94Xi
V75i / V75e / RL75i / RL75e
V65i / V65e
V53De
Hot Water Flow (GPM)
delta T - Temperature Rise °F
25 50 75 100 125
Tankless water heater output is based on Delta T, which is the dierence between the incoming water temperature and the requested output temperature. This chart
is used along with other factors to help size the Rinnai tankless model for your application.
FLOW CHART AND HERS DATA
RINNAI TANKLESS WATER HEATERS HOT WATER FLOW CURVE
HERS SCORES IMPROVE WITH RINNAI TANKLESS WATER HEATERS
Data analysis conducted by independent third party HERS rater compares traditional electric and gas residential storage tank water heaters to Rinnai’s Condensing and Non- Condensing Tankless Water Heaters. Consult and
validate your specific application with a local HERS rater.
For more information specific to your zone or city, visit hersindex.com.
CLIMATE ZONES
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2
3
4
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3-5 POINTS
4-6 POINTS
3-10 POINTS
4-9 POINTS
5-8 POINTS
4-8 POINTS
3-8 POINTS