Delete clause J8D4 and insert NSW J8D4 as follows:
(1) Heating for a spa pool that shares a water recirculation system with a swimming pool must be by—
- a solar heater; or
- a heater using reclaimed heat from another process such as reject heat from a refrigeration plant; or
- a geothermal heater; or
- a gas heater that—
- if rated to consume 500 MJ/hour or less, achieves a minimum gross thermal efficiency of 86%; or
- if rated to consume more than 500 MJ/hour, achieves a minimum gross thermal efficiency of 90%; or
- a heat pump; or
- a combination of (a) to (e).
(2) Where some or all of the heating required by (1) is by a gas heater or a heat pump, the spa pool must have—
- a cover with a minimum R-Value of 0.05; and
- a push button and a time switch to control the operation of the heater.
(3) A time switch must be provided to control the operation of a circulation pump for a spa pool having a capacity of 680 L or more.
(4) Where required, a time switch must be capable of switching electric power on and off at variable pre-programmed times and on variable pre-programmed days.
(5) Pipework carrying heated or chilled water for a spa pool must comply with the insulation requirements of J6D9.
Applications
J8D4 does not apply to a Class 2 building and a Class 4 part of a building.