AS NZS 5141:2018 pdf free

AS NZS 5141:2018 pdf free.Residential heating and cooling systems – Minimum applications and requirements for energy efficiency,performance and comfort criteria
The return air shall be located-
(a) in a position not directly adjacent to supply air grilles to reduce short-circuiting of supply and return air;
(b) in a position remote to the kitchen and toilet to reduce the immediate recirculation of odours;
(c) in a location of least annoyance due to return air noise;
(d) in a common area for a zoned system;
(e) if the system is used primarily for heating, at a height that is closer to the floor than the ceiling;
(f) if the system is used primarily for cooling, at a height that is closer to the ceiling than the floor except where the ciling is significantly higher than the occupied zone;
(g) in an accessible position if the return air grille includes a filter; and
(h) in a position that does not impact the operation of a smoke detector.
NOTE: For all ducted systems, relief air openings or undercut doors should be provided in all rooms in which there are no return air grilles (except kitchens, bathrooms, laundries and toilets).
The supply air outlets shall be selected and located to provide occupant comfort, effective air movement and efficient and effective performance.
NOTE Criteria that may impact this are air flow velocity, air flow volume, throw of the supply air, noise of the supply air and stratification.
The performance and efficiency of a climate control system is dependent upon effective air delivery through the ductwork. Ductwork layout shall be designed to minimize static pressure loss and shall not lose/gain excessive heat to or from the surrounding space. Ductwork shall be correctly sized, have thermal insulation for the climate conditions and use, and be installed to ensure effective and efficient delivery of the required design airflow. The supply and return air path between the indoor unit and the conditioned space shall be airtight.AS NZS 5141 pdf free download.