Catalog No.: 3500.24C
Effective: 08-10-11
Replaces: 01-15-08
Raytherm - Type WH
Models 2100-4100
Model
MODELS WH 2100 – 4001
MBTUH Width
Overall
Height
Gas
Conn.
Water
Conn.
Flue
Dia.
Model
No.
Input Output A
B
G
H
K
Approx.
Shipping
Weight (lbs)
WH-2100 2100 1722
61 68-1/4
*
3
24
1400
WH-2500 2499 2049
70 68-1/4
*
3
26
1580
WH-3001 3000 2460 81-1/4 68-1/4
2
3
28
1750
WH-3500 3500 2870 92-1/2 68-1/4
2
3
30
1920
WH-4001 4000 3280 103-3/4 68-1/4
2
3
32
2100
* 1-1/2” or 2”, contingent on water heater type code requirements
NOTES: Dimensions are in inches.
Ratings are for elevations up to 2,000 feet. For elevations over 2,000 feet, reduce ratings
4% for every 1,000 feet above sea level.
HEATER RATES OF FLOW AND PRESSURE DROPS
20°F
Δ
T 30°F
Δ
T 40°F
Δ
T
Model
No.
GPM
Δ
P (ft) GPM
Δ
P (ft) GPM
Δ
P (ft)
WH-2100 172 11.0 115 4.9 N/A N/A
WH-2500 N/A N/A 137 7.5 102 4.3
WH-3001 N/A N/A 164 11.2 123 6.5
WH-3500 N/A N/A 191 16.8 144 9.3
WH-4001 N/A N/A N/A N/A 164 12.8
Maximum acceptable flow through heat exchanger tubes is
200 GPM.
HEATER RECOVERY RATES (GPH)
Temperature Rise
Model
No.
20°F 30°F 40°F 50°F 60°F 80°F 100°F
WH-2100 10336
6890 5168 4134 3445 2584 2067
WH-2500 12300
8200 6150 4920 4100 3075 2460
WH-3001 14765
9844 7383 5906 4922 3691 2953
WH-3500 17227 11484
8613 6891 5742 4301 3445
WH-4001 19688 13125
9844 7875 6563 4922 3938
Raypak, Inc.
2151 Eastman Avenue, Oxnard, CA 93030
(805) 278-5300
Fax (800) 872-9725
www.raypak.com
Electrical Rating
Models
W/Pump
W/O
Pump
951276
pump*
11 Amps @
230VAC
2100-
4001
22 Amps @
110VAC
< 8 Amp
@
120VAC
* Pump requires separate
power supply
