Laars MASCOT HT 1.330 Quick Setup Manual - Water Pipe Sizing Guide
Maximum length of 3/4" - 1-1/4" hydronic circuit using a standard circ. Pump is 150ft.
Outdoor reset sensors should ALWAYS be placed in a location outside the structure
that will never "see" sunlight in the heating season.
(typically north side under an eave)
.
2"
2-1/2"
3"
SAFE RULES TO FOLLOW ON THE JOB
1/2"
3/4"
1"
1-1/4"
320,000
70,000
140,000
280,000
420,000
560,000
40,000
80,000
160,000
240,000
40,000
20,000
40,000
80,000
120,000
160,000
5,000
10,000
20,000
30,000
4
8
14
22
1,700,000
2,550,000
3,400,000
(remember antifreeze reduces efficiency and may require LARGER pumps)
Maximum concentration of antifreeze in low-mass boilers is 30%
Equiv. Length (100 ft. with Mascot internal pump)
Safely figure 500BTUH per linear foot of most residential baseboard convectors.
Maximum length of residential baseboard per circuit is 40ft.
85
425,000
850,000
Increase the potable water intake & discharge pipe openings from 1/2" to 3/4" will
adequate flow through the Mascot residential boilers.
Increase the boiler intake & discharge pipe opening from 3/4" to 1-1/4" will ensure
1,200,000
1,800,000
2,400,000
ensure adequate flow through the Mascot residential combination boilers.
60
300,000
600,000
780,000
1,170,000
1,560,000
39
195,000
390,000
440,000
660,000
880,000
110,000
220,000
1
1-1/2"
Water - BTU formula:
GPM X Temp. Change X 500= BTUH
Maximum Flow
GPM
BTUH per 10º F
temp. drop
BTUH per 20º F
temp. drop
BTUH per 40º F
temp. drop
BTUH per 60º F
temp. drop
BTUH per 80º F
temp. drop
Size (copper)
Water Pipe Sizing Guide
Refer to Sizing Charts for a complete system design