Specification

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Simply the Best

Tempra® Sizing Guide and Technical Data

Simply the Best

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Tempra

Tankless Electric Water Heater Sizing Guide

TEMPRA

MODEL

1 2 / 1 2 P l u s

15 / 15 Plus

1 Bath

2 Baths

3 Baths

4 Baths

29 / 29 Plus20 / 20 Plus

Install 2

24 / 24 Plus

Install 2

NUMBER OF BATHROOMS WITH

SHOWER IN HOUSE / CONDO

36 / 36 Plus

Warm (Southern) Climate

Inlet water 55°F - 70°F

Recommendations for 240 V units are correct if installed with 240 V service.

Increase one model size if unit will be installed with 208 V service.

Call Stiebel Eltron at 800.582.8423 if you have any sizing questions, or if you have high ﬂow showers, or

another out-of-the-ordinary situation. Stiebel Eltron service representatives can make recommendations

on sizing, or provide assistance with our water heaters, to both homeowners and professional installers.

Cool (Northern) Climate

Inlet water 45°F - 55°F

Tempra

Tankless Electric Water Heater Sizing Guide

TEMPRA

MODEL

1 2 / 1 2 P l u s

15 / 15 Plus

1 Bath

2 Baths

3 Baths

4 Baths

29 / 29 Plus20 / 20 Plus

Install 2

24 / 24 Plus

Install 2

NUMBER OF BATHROOMS WITH

SHOWER IN HOUSE / CONDO

36 / 36 Plus

Warm (Southern) Climate

Inlet water 55°F - 70°F

Recommendations for 240 V units are correct if installed with 240 V service.

Increase one model size if unit will be installed with 208 V service.

Call Stiebel Eltron at 800.582.8423 if you have any sizing questions, or if you have high ﬂow showers, or

another out-of-the-ordinary situation. Stiebel Eltron service representatives can make recommendations

on sizing, or provide assistance with our water heaters, to both homeowners and professional installers.

Cool (Northern) Climate

Inlet water 45°F - 55°F

Temp rise charts and technical

data on subsequent pages.



Summary of content (3 pages)

PAGE 1
Simply the Best Tempra® Sizing Guide and Technical Data NUMBER NUMBER OFOF BATHROOMS BATHROOMS WITH WITH SHOWER SHOWER ININ HOUSE HOUSE / CONDO / CONDO ® Tempra Tempra® Tankless Tankless Electric Electric Water Water Heater Heater Sizing Sizing Guide Guide T E M P R A ®® M O D E L M PPlus RA M E LPlus 20T /E20 24O/D24 1 Bath 1 Bath 29 / 29 Plus 36 / 36 Plus 12 / 12 Plus 15 / 15 Plus 12 / 12 Plus 15 / 15 Plus 20 / 20 Plus 24 / 24 Plus 29 / 29 Plus 36 / 36 Plus 2 Baths 2 Baths 3 Baths 3 Baths 4 Baths 4
PAGE 2
Simply the Best Tempra® Sizing Guide and Technical Data Temperature Rise vs. Flow Rate at 240 V and 208 V 90 80 70 Temp Rise °F 60 50 40 30 Tempra® 36 Tempra® 29 Tempra® 24 Tempra® 20 Tempra® 15 Tempra® 12 20 10 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 Flow Rate GPM Temperature Rise vs. Flow Rate at 240 V 90 80 70 50 40 30 20 Tempra 15 Tempra® 12 ® 10 Tempra® 36 Tempra® 29 Tempra® 24 Tempra® 20 Temperature Rise vs. Flow Rate at 208 V 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.
PAGE 3
Simply the Best TEMPRA ® Sizing SERIES Guide TANKLESS ELECTRIC Data WATER HEATERS Tempra® and Technical Technical Data 1 2 3 5 The Tempra® series is tested and certiﬁed by WQA against NSF/ANSI 372 for lead free compliance. Conforms to ANSI/UL Std.