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TANKLESS
WATER HEATERS
Models & Prices
Tankless Water Heater Product Guide
Description / Specification
Tankless Water Heater Applications
Residential / Commercial
Tankless Water Heater Electrical Guide
Service Calculations
Tankless Water Heater Installation
Plumbing / Electrical
Tankless Water Heater Cost Comparisons
Reports / Listings
Tankless Water Heaters Service Guide
Remove / Repair
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Product Specifications
Table
Standard 240 Volt
(AC) Operation, 240 VAC Rating
SEISCO®
Electric Fluid Heating System
BACK
TO Tankless Water Heater Product Guide
[ Four Chamber Models
]
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MODEL
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RA-28
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RA-22
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RA-18
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kW
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28
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22
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18
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Elements
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7000 watts ´ 4
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5500 watts ´ 4
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4500 watts ´ 4
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Btu/hr
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95560
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75080
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61430
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kg-cal/min
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400
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315
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258
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TEMPERATURE RISE
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95 °F @ 2.0 GPM
76 °F @ 2.5 GPM
64 °F @ 3.0 GPM
48 °F @ 4.0 GPM
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75 °F @ 2.0 GPM
60 °F @ 2.5 GPM
50 °F @ 3.0 GPM
37 °F @ 4.0 GPM
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61 °F @ 2.0 GPM
49 °F @ 2.5 GPM
40 °F @ 3.0 GPM
30 °F @ 4.0 GPM
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50 °C @ 8 L/min
40 °C @ 10 L/min
33 °C @ 12 L/min
25 °C @ 16 L/min
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39 °C @ 8 L/min
31 °C @ 10 L/min
26 °C @ 12 L/min
20 °C @ 16 L/min
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32 °C @ 8 L/min
26 °C @ 10 L/min
21 °C @ 12 L/min
16 °C @ 16 L/min
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MECHANICAL
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Size HxWxD
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15x 15x 6 in /
40x 40x 16 cm
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15x 15x 6 in /
40x 40x 16 cm
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15x 15x 6 in /
40x 40x 16 cm
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Plumbing fittings
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3/4-in NPT nipple x
2
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3/4-in NPT nipple x
2
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3/4-in NPT nipple x
2
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Shipping weight
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23 lbs / 10.5 kg
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23 lbs / 10.5 kg
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23 lbs / 10.5 kg
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ELECTRICAL
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V
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240
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240
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240
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A (max)
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116
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91
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75
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Hz
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50 / 60
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50 / 60
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50 / 60
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Circuits
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30A x 4
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50A x 2
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40A x 2
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APPLICATIONS
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