LAC 51:XIV.505. Minimum Capacities for Residential Water Heaters

A. Water heaters installed in residential occupancies may be sized in accordance with the following Table 505. Table 505 Minimum Capacities For Water Heaters1,2 Number of Bathrooms | 1 to 1.5 | 2 to 2.5 | 3 to 3.5 Number of Bedrooms | 1 2 3 | 2 3 4 5 | 3 4 5 6 First Hr Rating Gal. | 42 54 54 | 54 67 67 80 | 67 80 80 80 Nom. Tank Size, Gal. Gas Water Heaters | 20 30 30 | 30 40 40 50 | 40 50 50 50 Elect. Water Heaters | 30 50 50 | 50 66 66 80 | 66 80 80 80 Oil Water Heaters | 30 30 30 | 30 30 30 30 NOTES: 1. The main criteria for a properly sized water heater is a sufficient first hour rating to meet peak hot water demand. The majority of tank sizes shown in the table will have a first hour rating equal to or greater than the first hour rating indicated. A water heater with a smaller tank size than shown in the table but with a sufficient first hour rating shall be permitted. 2. The first hour rating is found on the "Energy Guide" label. B. Non-storage and solar water heaters shall be sized with sufficient capacity to meet the appropriate first hour rating shown in Table 505 above.