Retrofit upgrade to a 45 year old Government office building of over 5,400m2. The existing electric heating system was removed and replaced with high efficiency BAXI gas fired boilers which played a key part in reducing the buildings carbon footprint and achieving the target NABERS 4.5 star rating. BAXI PowerHT condensing boilers were selected for their high efficiency, compact size and the modular arrangement which made tham easy to install under restricted space conditions. The boilers have been in operation for two heating seasons and the maintenance contractors have provided positive feedback regarding their reliability and operation. The plant room contains 3 x 100kW Baxi PowerHT boilers in cascade controlled by a RVA47 Sequence Controller.

Project Overview:
Improvement from 2 to 4.5 Star NABERS energy rating achieved.
Total system investment of $1.5 million with a payback of as little as one year.
Total energy efficiency updates resulted in increase in asset value estimated at $1.4 million.
The project was awarded as the 2012 AIRAH winner under the category of ‘Excellence in Sustainability’. In addition the project was used by the government as a case study to highlight a model for energy efficiency. Read the case study for more info 4 Mort St Canberra Aust Gov Case Study.

Download Design Schematic:

System Design Schematic - 4 Power HT Cascade