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LAARS Heating Systems Company
Figure 4.
Dimensions
REF
HC 100 HC 125 HC 145 HC 175 HC 205 HC 240 HC 270 HC 300
Jacket Height
A
39"
39"
42"
42"
45¾"
45¾"
45¾"
45¾"
Jacket Width
B
21"
21"
23"
23"
25"
25"
25"
25"
Jacket Length
C
21"
21"
23"
23"
25"
25"
29"
29"
Overall Length
D
32"
32"
34"
34"
36"
36"
40"
40"
Smoke Outlet Height
E
24½"
24½"
27"
27"
29½"
29½"
29½"
29½"
Burner Center Line
F
10¾"
10¾"
11¾"
11¾"
12½"
12½"
12½"
12½"
Smoke Outlet Diameter
G
6"
6"
6"
6"
8"
8"
8"
8"
Smoke Box
H
1¾"
1¾"
1¾"
1¾"
2½"
2½"
2½"
2½"
Supply Size Water
I
1¼"
1¼"
1¼"
1¼"
1½"
1½"
1½"
1½"
Specification
HC 100 HC 125 HC 145 HC 175 HC 205 HC 240 HC 270 HC 300
D.O.E. Heating Capacity
100
125
145
175
205
240
270
300
Net Output M.B.H.
87
109
126
152
178
209
235
261
A.F.U.E. %
84.2
84
85.8
85.2
85.4
84.2
85.2
84.4
Firing Rate G.P.H.
.85
1
1.25
1.50
1.75
2.00
2.25
2.50
Net Stack Temperature
333
371
319
354
325
350
330
360
Water Capaqcity Gal.
21
21
34
34
42
42
48
48
Coil Capacity G.P.M.
5
5
5
5
5
5
5
5
Approx. Weight lbs.
494
494
608
608
764
764
810
810
Burner
Head Type
Static
Plate Stop
Blower Wheel
Nozzle Type
HC100
AFG
F3
3 5/8"
4 1/4" x 2 7/16"
.75 x 70°A
HC125
AFG
F3
3 5/8"
4 1/4" x 2 7/16"
.90 x 80°B
HC145
AFG
F6
2 3/4"
4 1/4" x 2 7/16"
1.10 x 80°B
HC175
AFG
F6
2 3/4"
4 1/4" x 2 7/16"
1.25 x 80°B
HC205
AFG
F16
2 3/4"
4 1/4" x 2 7/16"
1.50 x 80°A
HC240
AFG
F16
2 3/4"
4 1/4" x 2 7/16"
1.75 x 80°B
HC270
AFG
F22
2 3/4"
4 1/4" x 2 7/16"
2.00 x 80°B
HC300
AFG
F22
2 3/4"
4 1/4" x 2 7/16"
2.25 x 80°B
Tankless Coil
½" N.P.T.
B
A
Aquastat
Well
¾" N.P.T.
Fire Sight
Glass
C
8¾"
3½"
H
G
E
D
8"
Drain Valve
Relief Valve — ¾" N.P.T.
Supply — J N.P.T.
Return — J N.P.T.
7"
FRONT
SIDE
REAR
F
Domestic
Hot Out
Domestic
Cold In
OUT OF
PRODUCTION
