Product Overview

35 1/2” [902 mm]
1
7 1/4” [437 mm]
1
2” [305 mm]
4
1/4”
[108 mm]
1
4 1/2” [368 mm]
2
3/4”
[70 mm]
19 3/4” [502 mm]
7
3/8”
[
186 mm]
3/4” NPT Gas Connection
1-1/4” NPT Boiler Return
1-1/4” NPT Boiler Supply
3” Vent Outlet
3
” Combustion AIr Inlet
3/4” NPSC Pressure
Relief Valve
11 3/8” [288 mm]
6 7/8” [176 mm]
11 3/8” [288 mm]
1 7/8”
[51 mm]
15 5/8” [396 mm]
3/4” NPT Gas Connection
1-1/4” NPT Boiler Supply
1-1/4” NPT Boiler Return
3
” Vent Outlet
3” Combustion Air Inlet
3
/4” NPSC Pressure
Relief Valve
2
Boiler Specifications
Side View
Front View
Model Fuel
Input
Modulation
(MBH)
AFUE
DOE
Heating
Capacity MBH
Net
I=B=R
Boiler
Water
Volume (gal)
Supply
Return
Connection
Gas
Connection
Vent/Air
Diameter
Weight
Lbs
PT250
Natural or
Propane Gas
65 - 245 96% 223 194 4.1 1 1/4” 3/4” 3” 142
Pressure Drop Curve with Grundfos Circulators
Delta T GPM
Available System Head (Feet)
UPS15-58F/FC UP26-64F UP26-99F
20 19.4 ---- 6.9 14.9
30 12.9 4.5 13.5 22.5
40 9.7 8.8 16.5 25.8
0.0
8
10
13
15 18
20
23 25
5
4.0
8.0
12.0
16.0
20.0
24.0
28.0
32.0
Pressure Drop (Ft. W.C.)
Flow Rate (GPM)
Prestige SOLO 250
Grundfos UP26-99F
Grundfos UPS16-58F/FC - Spd 3
Grundfos UP26-64F