Technical Specifications
Tempra
®
 Sizing Guide and Technical Data
17 West St., W. Hatfield, MA 01088 | 800.582.8423 | 413.247.3380 | fax 413.247.3369 | info
@
stiebel-eltron-usa.com | www.stiebel-eltron-usa.com
SIMULTANEOUS 
FIXTURES
 42°F  52°F  62°F  72°F
Tempra
®
 12 
Trend 
&
 Plus
DRAWS 50 A - Requires minimum 100 A electric service
Tempra
®
 Trend & Plus Tankless Electric Water Heater Sizing Guide
 MAX. FLOW RATE FROM UNIT
  1.3 GPM  1.6 GPM  1.9 GPM  2.5 GPM
Tempra
®
 24 
Trend 
&
 Plus
DRAWS 100 A - Requires minimum 150 A electric service
Tempra
®
 15 
Trend 
&
 Plus
DRAWS 60 A - Requires minimum 100 A electric service
  1.6 
GPM  1.9 GPM  2.4 GPM  3.1 GPM
Tempra
®
 20 
Trend 
&
 Plus
DRAWS 80 A - Requires minimum 125 A electric service
  2.1 
GPM  2.5 GPM  3.1 GPM  4 GPM
Tempra
®
 29 
Trend 
&
 Plus
DRAWS 120 A - Requires minimum 200 A electric service
  3.1 
GPM  3.7 GPM  4.6 GPM  6 GPM
Tempra
®
 36 
Trend 
&
 Plus
DRAWS 150 A - Requires minimum 300 A electric service
  3.9 
GPM  4.6 GPM  5.7 GPM  7.5 GPM
1
  Use the map to find the approximate ground 
water temperature where you live.
2
  Check the column on the table with your 
ground water temperature to see how many 
fixtures can be supplied at the same time with 
hot water.
3
 Use your actual maximum flow rate to fine-
tune these recommendations. If you know you 
have 1.5 GPM low flow showerheads, for 
instance, then 3 GPM would supply 2 showers 
at the same time, or 1 shower plus 1 sink, etc.
MAX. FLOW RATE CALCULATED FOR 105°F WATER
SHOWER 
1.5 GPM
(RANGE 1.5-2.5)
KITCHEN SINK
1.5 GPM
(RANGE 1.0-2.2)
BATHROOM SINK
0.5 GPM
(RANGE 0.5-1.0)
FIXTURE FLOW  RATES 
(AND TYPICAL RANGES)
SIMULTANEOUS 
FIXTURES
 MAX. FLOW RATE FROM UNIT
SIMULTANEOUS 
FIXTURES
 MAX. FLOW RATE FROM UNIT
SIMULTANEOUS 
FIXTURES
 MAX. FLOW RATE FROM UNIT
SIMULTANEOUS 
FIXTURES
 MAX. FLOW RATE FROM UNIT
SIMULTANEOUS 
FIXTURES
 MAX. FLOW RATE FROM UNIT
42°F
52°F
72°F
62°F
  2.6 GPM  3.1 GPM  3.8 GPM  5 GPM
Minimum 150 A electrical service
2 separate dedicated 50 
A breakers
2 separate runs of 6 
AWG copper wire
Mínimo 150 A servicio eléctrico
2 disruptores separados de 50 
A
2 cables de cobre separados de 6 AWG
If you have questions about 
the operation or installation 
of this product, please call.
 Si usted tiene preguntas sobre la 
operación o instalación de este 
producto, por favor llámenos para 
obtener ayuda.
Model  Voltage  Power  Breaker required  Copper wire required
Tempra
®
 24 Trend & Plus  240 V  24 kW  2 x 50 A DP  2 x 6 AWG
  208 V  18 kW  2 x 50 A DP  2 x 6 AWG
UNIT 
REQUIRES
APARATO 
REQUERIDO 
 Stiebel Eltron 
800.582.8423
Low 
Flow
Technical data and temp. rise charts on next page. 


