Prestons Lodge Aged Care Facility

Prestons Lodge Aged Care Facility - Rheem

Issue 2: December 2017

Energy efficient solar system for Prestons Lodge Aged Care Facility

Built in 2016 by Advantaged Care, a leading provider of residential aged care facilities in Sydney, Prestons Lodge in Sydney’s west is a 132-bed contemporary aged care home providing a homely, secure and safe environment for residents.

When JHA Consulting Engineers approached Rheem to help design an energy efficient commercial water heating system for the new facility, the Rheem Commercial team was happy to assist.

“Rheem Commercial has extensive experience designing aged care facility water heating installations, so we understand the unique needs of this sector in terms of commercial viability, reliability and safety,” says Joshua Elliott, Rheem’s NSW Commercial Sales Manager.

The requirements for Prestons Lodge were two-fold: provide an energy efficient solar and warm water system to service a daily warm water load of just over 9,000 litres for 132 bedrooms and a commercial kitchen. And also deliver a system to be as cost effective as possible.

With this in mind, Rheem Commercial’s final proposal included budget estimates, STC rebates and pay back periods. We also conducted a study comparing the capital, installation and ongoing maintenance costs of TMVs versus a centralised Rheem Guardian solution.

A unique, cost effective solar commercial solution

Based on a thorough cost analysis, Rheem Commercial ultimately recommended a bespoke system to include three Heavy Duty Gas 275L water heaters, one 240L/min Guardian Warm Water system and two 250L/min UV Disinfection systems connected to 14 Commercial Storage tanks and 38 NPT solar collectors. These collectors now provide 50 per cent of the total hot water load in December and 37 per cent over the full year.

According to Joshua, Prestons Lodge is unique in the Rheem hot water world: “Prestons Lodge has four Rheem systems working in harmony together to deliver over 9,000 litres of hot water each day. It’s powered by 38 solar panels and heavy-duty gas boost to ensure continuous, reliable hot water all year round,” he says.

“By our calculations, the combined gas and solar water heating solution will result in a saving of around $87,500 in running and maintenance costs over 10 years, compared to a standard non-centralised TMV and gas only solution.”

Prestons Lodge solution

  • 3 x Heavy Duty Gas 275L water heaters
  • 38 x NPT solar collectors
  • 14 x 610430 Commercial Storage tanks
  • 1 x 940240 240L/min Guardian Warm Water system
  • 2 x 940002 250L/min Ultraviolet Disinfection systems

If you would like to find out more about our aged care facility installations or need assistance designing a unique or challenging commercial hot water system, please contact Rheem Commercial today on 132552.


Hot Water Running Costs
Estimated Annual Hot Water Consumption - Approximately 3,348,875 litres p.a. based on 100% occupancy. 2,479 MJ/day @ 2.5c per MJ
Average Annual Solar contribution: 37% or 888 MJ per day
Estimated Annual Running Cost - Gas Only: $22,618 p.a.
Gas and Solar: $14,515 p.a.
Estimated Savings: $8,103 p.a.

Warm Water Costs*
Estimated capital and installation costs – TMV = $42,773; Guardian and UV disinfection = $23,980
Estimated annual maintenance costs – TMV = $10,334; Guardian and UV disinfection = $3,400

The centralised solution realised approximately $18,500 in up-front cost savings and a further $6,900 p.a. in ongoing maintenance costs, providing a life cycle cost saving over 10 years of around $87,500.

*Assumed one TMV per two rooms