Sustainable life logo with pale green “de to” text and teal infinity symbol in a circle.

St John of God Hauora Trust Hot Water Heat Pump Turnkey Project

St John of God Hauora Trust

Hot Water Heat Pump Turn Key Project

$30,000 Domestic Hot Water Cost Reduction & a 3 Year Payback on a DETA Turnkey Project

Problem

St John of God (SJOG) had a distributed hot water system that was starting to fail. They were looking for a long term solution, while also looking to reduce their operating costs.

Solution

DETA prepared a business case to replace four existing hot water cylinders with a centralised ring main with a heat pump. The system proposed was more technically complex than the existing system, but offered redundancy in heating (heat pumps and re-purposing gas boilers) and could also provide heat for an existing underfloor heating system. DETA designed, consented, project managed and commissioned the system.

Outcome

The project was installed within an operational hospital with no reduction in hot water service. It has reduced hot water costs by 70%, and reduced underfloor heating costs by 60%. The system was delivered under budget, started operating in January 2016 and has run faultlessly.

Large industrial warehouse complex at sunset with rooftop equipment and surrounding trees
15 October 2026
Overcome financial barriers to industrial decarbonisation. Explore DETA's phased roadmap covering energy efficiency, heat pumps, electrification, and funding.
Modern glass-fronted farm building beside vineyards under a bright sky
by Jeff Smit • 30 September 2026
Explore natural refrigerants for kiwifruit cool storage, comparing CO2 and ammonia systems to reduce emissions, improve energy efficiency and lower costs.
Industrial plant with silver pipelines, workers in safety gear, and large tanks under a clear sky
24 September 2026
Discover how DETA mapped 14.5 PJ of industrial gas demand across NSW manufacturing to create a sector-wide decarbonisation roadmap for SME processors
Show More