Aggregating green technologies, products and services leads to resilient, innovative, renewable energy projects that produce greater cost savings and carbon emissions reductions.


Aggregating green technologies, products and services leads to resilient, innovative, renewable energy projects that produce greater cost savings and carbon emissions reductions.


HUBER is an established, multinational corporation that specializes in the production of high-quality machines, plants and stainless-steel equipment for municipal and industrial water, wastewater and sludge treatment. With more than 40,000 installations worldwide, HUBER contributes to the solutions of the global water problems.

Drawing on almost 100 years of experience, HUBER has developed and patented the HUBER ThermWin® system that recovers thermal energy from sewage. The self-cleaning ThermWin® system diverts sewage from the sewer, screens it, pumps it through the above-ground heat exchangers, and then returns it to the sewer. Because the sewage is screened and pumped, the ThermWin® system can use compact and cost-effective heat exchangers, wherein it can generate a well-defined and turbulent flow for efficient heat transfer.

Noventa is proud to be working exclusively with HUBER to promote the ThermWin® technology across North America.  At Noventa, our engineering team works with HUBER to provide REIMAGINING ENERGYTM services to design customized energy solutions for residential communities, commercial and institutional buildings, and industrial facilities throughout the US and Canada. In partnership with Trane (our exclusive heat pump supplier), local engineering design firms, and mechanical contractors, we design, build, finance, own, and operate projects that significantly reduce CO2 emissions and manage energy costs.  We are also leasing or selling the Huber ThermWin System to environmentally conscientious customers across the US and Canada.

For more information on Huber please visit their website at:

HUBER ThermWin® System: How It Works – Energy from Wastewater

Wastewater contains thermal energy. Using our exclusively licensed HUBER ThermWin® system, in conjunction with Trane heat pumps, we can extract this energy from the sewer to supply heating to buildings in the winter or we can reject heat to the sewer to provide cooling to buildings in the summer.

  • A portion of the raw sewage flows via gravity through an intake structure from the sewer into the wet well and the HUBER Pumping Station Screen, ROTAMAT® RoK4 that retains the coarse solids.
  • The solids retained by the screen are transported vertically upwards and returned to the sewer system.
  • The screened wastewater is lifted by a pump installed in the inlet structure and flows by gravity through the RoWin® heat exchanger installed above ground. This creates continuously stable hydraulic conditions and ensures a controlled heat transfer. In the HUBER RoWin® Heat Exchanger the heat energy is transferred to a cooling medium (normally water) which transports the energy to a heat pump.
  • The cooled wastewater flows back to the sewer taking along the screenings separated by the HUBER Pumping Stations Screen ROTAMAT® RoK4.
Description of HUBER ThermWin® System Components
  1. Sewer: The HUBER ThermWin® System is independent of sewer shape and size. Even small flow rates are handled without problems due to the gravity system and intake near the sewer bottom.
  2. Wet Well – Shaft with Screen: The shaft is located directly at the sewer and has two functions. It serves as a sump for the pump feeding the heat exchanger and houses the HUBER Pumping Stations Screen RoK 4®. This type of HUBER screen is well-proven worldwide and ensures pre-screening of the wastewater to protect the heat exchanger against coarse material. A vertical screw conveyor with brushes transports the separated solids upwards and at its top discharges them to the sewer.
  3. Heat Exchanger: The HUBER Heat Exchanger RoWin® has been developed especially for wastewater applications. The tank is completely made of stainless steel and is odour-tight, and therefore can be installed even in residential areas. The patented self-cleaning mechanism and sediments removal screw inside the RoWin® guarantee continuous system operation with low maintenance requirements. Due to its modular design, the HUBER Heat Exchanger RoWin® can be tailored to suit project-specific requirements.
  4. Heat Pump: Many buildings in North America are designed with heat pumps because they are able to provide both heating and cooling, thereby reducing capital and operating costs. Additionally, by reducing natural gas consumption, they contribute to lower carbon emissions. Noventa has partnered with one of the world’s leading suppliers of heat pumps: Trane. By combining HUBER technology and Trane heat pumps, Noventa is able to significantly reduce carbon emissions, improve HVAC system reliability and lower operating costs.

For every 1KW of electric energy put into a heat pump, Noventa’s proprietary HUBER ThermWin® system can produce over 6KW of eco-friendly energy to heat and cool buildings.

Benefits of the HUBER ThermWin® Systems
  • Energy cost savings
  • Efficient use of renewable and sustainable energy
  • Independence of gas or oil
  • Quick and easy installation
  • Heat exchangers above ground (easy access for installation and maintenance)
  • Little construction work (narrow manhole beside sewer)
  • Minimal interference of existing sewers (only drilling of two holes)
Application/Target Markets
  • District energy systems
  • Buildings/Complexes that produce significant warm wastewater from uses like showers, dishwashing, toilets, sterilization, laundry, industrial/food processing, etc.
  • Hotels
  • Hospitals
  • Multi-residential
  • Industrial processes
  • Municipal partnerships