Project Profile: A Masterclass in Integrated Geothermal Comfort

Property type: Residential
Services Installed:
Domestic Hot Water

Underfloor Heating

Air Conditioning

Pool Heating

Mechanical Ventilation

Wine Cellar

Home Automation
Energy Source:
Vertical Ground Heat Exchanger
Size (kW): 110

A Masterclass in Integrated Geothermal Comfort

A landmark residence in Sydney’s exclusive eastern suburbs has set a new standard for sustainable luxury. This stunning 2,000m² Heritage home is now powered by a fully integrated, silent, and ultra-efficient geothermal heating and cooling system—a testament to sophisticated engineering and environmental stewardship.

RHCS designed and delivered a complete ground-source solution that seamlessly manages the home’s extensive climate control needs with remarkable efficiency and elegance.

The Challenge:

To provide whisper-quiet, year-round comfort and precise climate control for a vast, multi-zone luxury residence, including pools and domestic hot water, while significantly reducing operational energy use and environmental impact.

The RHCS Solution:

Harnessing the Earth: Twenty geothermal probes were drilled to a depth of 150 metres, utilising high-efficiency Muovitech 45mm turbo piping to form a robust underground energy exchange loop.
Whole-Home Heating & Hot Water: A high-capacity Ecoforest heat pump system draws stable geothermal energy to supply the entire home’s underfloor heating, domestic hot water, and pool heating requirements.
Precision Cooling & Climate Control: For optimal efficiency in cooling mode, the system integrates Mitsubishi Electric water-cooled VRF technology, distributing conditioned air across 35 independent zones with pinpoint accuracy.
Advanced Pool Hall Environment: The indoor pool area features a complete climate-management system, including active dehumidification and controlled air change, ensuring perfect comfort and air quality while protecting the structure.
Premium Hydronic Infrastructure: The system is completed with a dedicated stainless-steel pipework manifold and Grundfos circulation pumps, ensuring silent operation, longevity, and maximum hydraulic efficiency.

The Result:

The home now enjoys a perfectly controlled environment in every space—from living areas to both outdoor and indoor pools. The system eliminates the need for traditional, noisy outdoor units, preserving the property’s aesthetic and acoustic serenity. This forward-thinking installation provides the ultimate in homeowner comfort while delivering exceptional energy savings and a drastically reduced carbon footprint.

Project Specifications:

Property: 2,000m² High-end Residence, Eastern Suburbs
Technology: Integrated Geothermal (Ground-Source) System
Heating & DHW: Ecoforest Geothermal Heat Pumps
Cooling: Mitsubishi Electric Water-Cooled VRF (35 Zones)
Ground Loop: 20 x 150m probes with Muovitech 45mm Turbo Pipe
Specialist Areas: Full climate control for indoor pool (dehumidification & air change) and heating for two pools
Infrastructure: Stainless steel pipework manifold & Grundfos pump sets

Designed in partnership with GeoExchange Australia.

This project exemplifies the RHCS philosophy: where cutting-edge renewable engineering meets the uncompromising standards of luxury living.

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Ellerston, NSW

Arcare, Aranda

Esplanade, Mosman

Coolawin Rd, Northbridge

OUR TRUSTED PARTNERS

When we moved into our house last year, just as winter was setting in, we realised we needed to retrofit 2x 30yr old gas boilers for our underfloor heating system. After trying to get quotes, install times from other vendors, Radiant were able to come out on short notice and inspect our system / requirements. Sizing the system was quite complex given the type of piping used in original build, the layout of our house, expected usage of each section and the potential heat loss from single pane windows.
Within a few weeks, Radiant were on on site installing 2x new electric heat pumps including the relocation of DHW units / buffer tanks to make better use of our internal space. Once installed, our house was nice and warm throughout the depths of a Southern Highlands winter and the efficiency of the unit was much better, and I continue to gain efficiencies through minor adjustments (timer settings, buffer tank temperatures etc) which I discuss with the Radiant team. Been a pleasure to work with Jimmy and Josh

Ben McCallum

Stop before you do anything with your home heating or cooling, or specifically geothermal or with heat pumps, talk to these guys. We've had a very complicated geothermal heating system, multiple heat exchangers, underfloor heating, pumps and also water cooled AC.
Jimmy and the team were the only ones who knew absolutely everything that needed to be done to get it working properly, efficiently. Not only that they explained everything along the way and made sure the system and us as the users were operating it and it was properly setup. My only wish is that we'd engaged Radian Heating and Cooling earlier in the process it would have saved so much time and effort.
These guys solved lots of problems others couldn't and set the system up much better and with more reliability. They are always ready to answer a quick question and very responsive. I rarely write reviews but these guys really deserve the review and you'll be very happy you engaged them. Thanks Jimmy and team !

James Spenceley

Schiavello Construction (NSW) was engaged by Waverley Council to finalise the construction of the Bondi Boot Factory Adaptive Reuse Project at Bondi Junction. Schiavello Construction (NSW) contracted the Geothermal ground heat exchanger header pipework scope works to RHCS, whom provided specialist input into the design of the pipework system to allow for an efficient and defect free installation.

The team at RHCS was a pleasure to deal with during construction & would recommend them for any future projects

Eastern Suburbs Residence

A Masterclass in Integrated Geothermal Comfort

The Challenge:

The RHCS Solution:

The Result:

Project Specifications:

Ellerston, NSW

Arcare, Aranda

Esplanade, Mosman

Coolawin Rd, Northbridge

Ben McCallum

James Spenceley

Graeme Ingram - Construction Manager

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