Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XIV - Plumbing
Chapter 5 - Water Heaters
Section XIV-505 - Minimum Capacities for Residential Water Heaters

Universal Citation: LA Admin Code XIV-505

Current through Register Vol. 50, No. 9, September 20, 2024

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

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.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

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