1. First hour rating based on heating water from 50°F to 140°/115°F with 180°F boiler water temperature. Gas- and oil-fired
and electric water heater first hour ratings based on DOE test procedure using 90°F temperature rise (55°F to 145°F).
2. Net I=B=R Output, Water
3. Useable hot water based on recent completion of recovery period, but no additional boiler input after draw begins.
Table 1: Peerless Partner Ratings
2
d. Boiler. PP-80, PP-120, PP-80-DW, and PP-120-DW require full boiler output listed in Table 1. If boiler is a
condensing boiler, such as Peerless®Pinnacle®, the above Peerless®Partner®models can be used with
reduced boiler output. If boiler output is less than shown in Table 1 reduce first hour rating as shown in
Table 2. Increase boiler size only if first hour rating does not meet estimated peak hour usage.
If a boiler with listed output is not needed for space heating, an alternative to a PP-80/120 would be
a PP-40 or PP-60 piped in series with an unfired storage tank (i.e. electric water heater without heating
elements energized).
If Peerless Partner is to be used with Peerless Boilers Series 63 or Series 64 steam boiler, refer to Series
63/64 Installation, Operation and Maintenance Manual for special installation and operation instructions.
PB Heat, LLC cannot recommend the use of other steam boilers with Peerless Partner at this time. Other
than Series 63 and Series 64 steam boilers, Peerless Partner should only be used with water boilers.
Contact PB Heat, LLC for additional information.
e. Domestic water priority. First hour ratings may be less than published when boiler output is shared with
space heating. Generally a consumer will notice a drop in domestic water temperature before a drop in
space heating temperature. Giving domestic water production priority by directing entire boiler output to
Peerless Partner will maximize domestic water output. However, prioritization controls could result in an
unacceptable drop in space heating temperature when large quantities of domestic hot water are used,
and a prioritization control malfunction could result in loss of space heating.
3. Multiple Water Heaters. Peak domestic water usage (first hour rating) or unusual peak draw may not be met
with a single water heater. Multiple units can be installed as either a bank of tanks acting as a single unit, or
as multiple individual units sized and located for specific draw situations.
Model
No.
First Hour Rating1[gallons] Minimum Boiler Output2to Achieve
First Hour Rating [Btu per hour]
Useable Hot Water
[U.S. Gallons]3
Heat Exchanger
Surface Area [ft2]140°F 115°F
PP-30-LB 169 234 114,000 22 15
PP-40 212 292 141,000 28 20
PP-60 266 370 174,000 46 20
PP-80 330 440 212,000 64 34
PP-120 423 564 269,000 94 34
PP-40-DW 70 108 107,000 28 20
PP-60-DW 90 144 176,000 46 20
PP-80-DW 138 215 208,000 64 20
PP-120-DW 210 326 231,000 94 20
