Completed Project

Dover Heights Project

Architect: ROAr – Rolf Ockert

Builder: Bellevarde

Location: Dover Heights, Sydney

System: Geothermal Exchange System

Capacity: 59kW

Project Brief/Scope:

  • High-end residential project
  • Forced air heating and cooling
  • Hydronic underfloor, pool, spa, and domestic water heating
  • Coastal location
  • High salinity environment
  • Attention to maintenance and replacement costs
  • Indoor/protected geothermal exchange equipment

CWL Group’s first project with Bellevarde was in 2006. 17-years on, CWL Group has been brought in on yet another Bellevarde project to provide a premium heating and cooling system for this Dover Heights property.

This home’s captivating ocean-front cliff-edge location is easy on the eyes, but would be relentless on conventional outdoor heating and cooling equipment. Life cycle studies performed by The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) estimate that the life expectancy of conventional outdoor air-conditioning systems in a standard environment is 12-15 years. In a salt-spray environment such as this, air source equipment would be lucky to survive half that.

In contrast, ASHRAE states that the life expectancy of a ground source heat pump is “24+” years. Located deep within the centre of the building, the geothermal exchange plant room is completely unaffected by the high salinity air that surrounds the home. Moreso, the system’s vertical ground heat exchanger – which constitutes a majority of the capital investment in a geothermal exchange system – has a 200-year life expectancy.

This substantial reduction in ongoing equipment replacement costs, combined with reduced maintenance costs and energy savings when using the system for heating and cooling the home, as well as heating the spa, pool, and domestic water, mean that this client is expected to pay off their geothermal exchange system in just 5.5-years. And just like CWL Group’s partnership with Bellevarde, these savings will continue for decades – even generations – to come.

Forced air heating and cooling

Our Trusted Partners

We wanted to drop you a line to say thank you for your expertise and professionalism during our geo journey. Your patience and outstanding knowledge were visible along the way and greatly appreciated. Congratulations in assembling a team who have all been of the same high standard. It has been a pleasure to deal with all of you.
- Jenine Cranston and Douglas Fone, Artarmon, Sydney
We engaged CWL for the geothermal exchange and HVAC works on our unique project in Bellevue Hill and were selected based on pricing and their previous experience. It turned out to be the best choice in subcontractors we made for the whole project. Their professionalism, work ethic, expertise and willing to help wherever needed made a highly complex services installation that much easier, and more efficient than expected. I’d like to personally thank James and the site team who put the extra effort in at all times to get our project over the line with remarkable results. Highly recommended Subcontractors and mechanical consultants.
- Theo Elphick, Site Manager, Built
A culture of striving for excellence combined with motivated and dedicated staff is what defines CWL Group. Their workmanship is second to none and it is obvious that all of the staff care about what they do. Commitments are met and exceeded and there are no problems that can’t be resolved. I’m looking forward to working with Clayton and his team in the future and have no hesitation in recommending them to anyone.
- Mick Carroll, Bellevarde Constructions
The team from CWL Group are very reliable, responsive and efficient in their work. They go above and beyond to make sure the job is completed at its highest standard. The knowledge of the guys is exceptional. I would recommend the CWL Group team every time!
- Annemarie Rodrigo, Bellevue Hill House Keeper
I want to thank CWL Group for the outstanding work in installing our hydronic heating system. I have worked with many plumbers over the years and I have never seen such a high standard of workmanship. They came in on time and on budget. I cannot recommend the team from CWL Group highly enough.
- Robert & Roberta Cook, Blue Mountains

Service that goes Above and Beyond... and Below.

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