Operating Guide

17 West Street | West Hatfield, MA 01088 | Toll Free 800.582.2213 | Phone [phone] | Fax [phone] | [e-mail] | www.aptankless.com
*AQM 2-1 is internally restricted to 0.32 GPM.
AQM 2-1, 2.5-1, 3-1 ship with a 0.5 GPM pressure compensating ow reducer/aerator that must be installed.
AQM 3.5-1, 4-2 ship with a 0.66 GPM pressure compensating ow reducer/aerator that must be installed.
AQM 6-2 ships with a 1.0 GPM pressure compensating ow reducer/aerator that must be installed.
AQM MODEL
Ultra-Low
Standard
Standard
Flow Rate at Sink
0.32
0.50
0.66
High 1.0
Flow
GPM
FL
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 Aqua Power® at 800.582.2213 if you have any sizing questions, or another out-of-the-ordinary
situation. Aqua Power® service representatives can make recommendations on sizing, or provide
assistance with our water heaters, to both homeowners and professional installers.
AQM Sizing Guide
Single Hand Washing Sink Tankless Electric Water Heater
Cool (Northern) Climate
Inlet water
45°F - 55°F
Cool (Northern) Climate
Inlet water
45°F - 55°F
Warm (Southern) Climate
Inlet water
55°F - 70°F
HI
AK
MB
ON
QC
PE
NS
NH
VT
MA
CT
RI
NJ
DE
MD
NB
ME
NY
PA
WV
VA
NC
KY
TN
SC
GA
MS
AL
MO
AR
LA
TX
FL
OH
IN
IL
ID
OR
WA
NV
MT
WY
UT
AZ
CA
NM
CO
IA
MN
ND
SD
NE
KS
OK
MI
WI
AB
SK
BC
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AQM 2-1* AQM 2.5-1 AQM 3-1 AQM 3.5-1 AQM 4-2 AQM 6-2
120 V
Requires 20 A
circuit breaker
120 V
Requires 30 A
circuit breaker
120 V
Requires 30 A
circuit breaker
120 V
Requires 40 A
circuit breaker
240 V
Requires 20 A
circuit breaker
240 V
Requires 30 A
circuit breaker