Heating Helper

CHAPTER 4 - DOMESTIC HOT WATERB. COMMERCIAL: Commercial buildings have different domestic hot.. .water needs. Building type will be the major variable. The two.. .charts that follow analyze the demand based either on Fixture or.. .Occupancy.Note: Both charts presume the use of storage type heaters.Chart #1(Gallons of water per hour per fixture, calculated at a final temperature of 140°F)1. Basins, privatelavatory2. Basins, publiclavatoryApt.House Club Gym Hospital HotelInd.PlantOffice Priv.Bldg. Res. SchoolYMCA2 2 2 2 2 2 2 2 2 24 6 8 6 8 12 6 — 15 83. Bathtubs 20 20 30 20 20 — — 20 — 304. Dishwashers 15 50-150 — 50-150 50-210 20-100 — 15 20-100 20-1005. Food basins 3 3 12 3 3 12 3 3 126. Kitchen sink 10 20 — 20 30 20 20 20 20 207. Laundry,stationary tubs20 28 — 28 28 — — 20 — 288. Pantry sink 5 10 — 10 10 — 10 5 10 109. Showers 30 150 225 75 75 225 30 30 225 22510. Slop sink 20 20 — 20 30 20 20 15 20 2011. Hydrotherapeuticshowers— — — 400 — — — — — —12. Circular wash sinks — — — 20 20 30 20 — 30 —13. Semi-curcularwash sinks— — — 10 10 15 10 15 — —14. Demand factor 0.30 0.30 0.40 0.25 0.25 0.40 0.30 0.30 0.40 .040Notes:A. #1 through #13 - Possible Maximum DemandB. #14 (Demand Factor) - Probable Maximum DemandC. #15 Ratio of Storage Tank Capacity to Probable Max. Demand Per Hr.. . .Example:50 Unit Apartment Building50 lavatories x 2 = 100 GPH50 showers x 30 = 1500 GPH50 kitchen sinks x 10 = 500 GPH10 laundry tubs x 20 = 200 GPHA) Possible Maximum Demand = 2300 GPHDemand Factor (#14) . x .30B) Probable Maximum Demand = 690 GPHStorage Capacity Factor (#15). . 1.25C) Storage Tank Size = 863 GAL.64