scope:

Inclusions

This PAS includes both technical and non-technical guidance on the following:

(a) Single-boiler and modular-boiler systems, condensing and non-condensing types, primarily designed to provide space heating from 40 kW to 2 MW, including:

(i) Determining load

(ii) Determining efficiency of the boiler system;

(b) Multiple-boiler systems, condensing and non-condensing types, primarily designed to provide space heating, including:

(i) Determining load for each boiler

(ii) Determining efficiency of each boiler

(iii) Calculating overall efficiency of the system;

(c) Boiler systems designed to deliver water from the system at a temperature range between 30°C and 100°C;

(d) Boiler systems designed to provide heating for spaces with a floor area greater than 300 m²;

(e) Gas and liquid fuels (specifications are contained in 3.2);

(f) Energy efficiency aspects of a boiler system;

(g) Emissions and carbon dioxide (CO₂) impact;

(h) Fuel combustion efficiency;

(i) New Zealand safety requirements; and

(j) New Zealand Building Code requirements.

Exclusions

Excluded from this document are the following:

(a) Heat pump units;

(b) Single-dwelling domestic applications;

(c) Large or bespoke boiler systems;

(d) Coal, biomass, non-fossil fuel types, or co-firing coal boilers;

(e) Installation advice (other than generic information);

(f) Boiler systems designed to provide potable water (as a primary function).