Heat as a Service

What is Heat‑as‑a‑Service?

Heat‑as‑a‑Service captures renewable heat from wastewater and uses it to provide reliable, low‑carbon heating and cooling for facilities such as public swimming pools, commercial buildings and industrial sites. Rather than relying on fossil gas, it turns a constantly available local resource into affordable energy.

How does it work?

Every day, warm wastewater flows through sewer networks and treatment plants. Heat‑as‑a‑Service safely recovers this unused thermal energy and puts it to work. Specially designed heat exchangers extract heat from the wastewater without any physical contact. The heat is transferred through a sealed, clean‑water loop to an electric heat pump, which lifts the temperature to the level required for use.

The recovered heat can then be used to:

• Heat swimming pools and aquatic centres
• Provide space heating and hot water for buildings
• Deliver cooling where required

Multiple physical barriers separate wastewater from the clean heating system, making cross‑contamination virtually impossible.

Proven and trusted technology

Wastewater heat recovery is a well‑established technology that has been used safely and successfully for more than 50 years. Today, more than 1,000 systems operate worldwide, including in Switzerland, Germany, New Zealand, Canada and Scotland.

The benefits

For a single commercial swimming pool, Heat‑as‑a‑Service can:

• Save up to $300,000 per year in heating costs
• Reduce gas consumption by around 20,000 gigajoules (GJ) annually
• Avoid more than 1,000 tonnes of CO₂‑equivalent emissions each year

That emissions reduction is equivalent to:

• Removing around 350 petrol cars from the road for a year, or
• Powering approximately 200 Australian homes annually