Product Overview

Hot Water Sizing Method For Braukmann Mixing Valve Selection
Table 1 – Fixture Unit Worksheet
Fixture Units Fixture Unit Calculation
Fixture Private Public # of Fixtures (multiply by) Fixture Units Equals Total
Lavatory 1 2 x =
Kitchen Sink 2 4 x =
Bathtub 2 4 x =
Separate Shower 2 4 x =
Clothes Washer 2 4 x =
Dish Washer 1 2 x =
Total
Step 1 - Determine Fixture Units – Table 1
Step 2 - Using Total Fixture Units determine load in Gpm from Table 2.
Step 3 - Select product based on minimum flow requirement and allowable pressure drop (20 psi).
Example – A system with 40 Lavatory (private), 40 Bathtubs (private) and 5 Lavatory (public) has total fixture count of 130 fixture units.
From Table 2 - 130 fixture unit = 38 Gpm
Table 2 – Domestic Hot Water Demand – Load Data
Fixture Units Gpm Fixture Units Gpm Fixture Units Gpm
2 2 55 23 350 72
6 4.5 60 24 400 78
10 6.5 70 27 450 86
14 8.5 80 29 500 93
20 11 90 31 550 100
24 13 100 33 600 107
30 15 130 38 650 115
34 16.5 160 43 700 122
40 18.5 200 49 750 130
45 20 260 58 800 134.5
50 21 300 64 1000 156