Raypak 181-401 Fascicule
Catalog No.: 2000.203E
Effective: 12-1-07
Replaces: 4-1-05
Raytherm - Type H
Hydronic Heating Boilers - Indoor
Model
Dimensions (Inches)
Shipping Weight
(Lbs.) – Approx.
Model
No.
MBTU
Input
MBTU
Output
AFUE
(%)
Width
A
Height
C
J
Flue Dia.
K
No Pump w/ Pump
H-181* 181 148 82.6 18-1/4 62-5/8 12-1/16
6
191
221
H-261 264 216 82.7 22-3/8
62-7/8 11-1/8
7
214
244
H-331
334 274 N/A
25-3/4
63-3/4 10-3/4
8
234
264
H-401*
399 327 N/A
29-1/4 65-3/8 12-1/2
9
253
283
* Exceptions on H3 (two-stage-fired) models:
- Model H3-181 has an 18-1/4” gas connection
- Model H3-401 has 375 MBTU Input and 308 MBTU Output
- Model H3-401 has 375 MBTU Input and 308 MBTU Output
NOTE: Ratings shown are for elevations up to 2,000 feet. For elevations over 2,000, reduce ratings at the rate of 4% for each
1,000 feet above sea level.
BOILER RATE OF FLOW AND PRESSURE DROP
10°
∆T
20°
∆T
30°
∆T
Model
No.
GPM
∆P FT
GPM
∆P FT
GPM
∆P FT
H-181 30 4.2 N/A N/A N/A N/A
H-261 43 8.5 22 2.2 N/A N/A
H-331 N/A N/A 27 3.4 N/A N/A
H-261 43 8.5 22 2.2 N/A N/A
H-331 N/A N/A 27 3.4 N/A N/A
H-401
N/A N/A 33 5.2 22 2.3
N/A – Not Applicable
Low NOx
*
Raypak, Inc.
2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 Fax (800) 872-9725 www.raypak.com