The future of

thermal energy storage

The future of

thermal energy storage

Carbon neutral heating and cooling

Cheap, green, and constant.
The solution to storing your solar energy to deliver carbon neutral heating and cooling 24/7 365 days of the year.
solar plant

Renewable Thermal Energy Storage
for HVAC Systems

At HVAC TES, a division of Polyweld, we specialise in solar powered thermal energy storage (TES) tanks made using unique thermal membrane fabric containments. Designed to utilize solar power for renewable heating, ventilation, and air conditioning (HVAC) systems. Our Thermal Energy Storage TES tanks store solar power as thermal energy during peak solar power generation periods and release it during peak demand, ensuring efficient energy usage saving costs and emissions. Whether you’re transitioning a large-scale industrial complex or a residential building, to renees energy, our solutions provide unmatched reliability and sustainability, reducing your energy bills and Carbon  footprint while maintaining comfort.
Explore our existing range of Thermal Energy Storage tank solutions to supply reliable  low cost renewable heating and cooling to your new building, or engage us to provide a custom-engineered  renewable Thermal Energy Storage TES solution to integrate into the  built environment. Our TES are manufactured to the highest industry standards, with over half a century of experience in thermoplastic welding and custom fabrication. Our tanks are designed to integrate seamlessly into your existing services, making the transition to renewable energy smooth and efficient
Polyweld tank with thermal water storage

The Solution To Thermal Energy Storage​

HVAC TES, our solution, is a thermal energy storage system that can fully replace fossil fuels to provide heating and cooling in industrial and commercial settings.

The system is cheap, easily made and quickly deployed. Excess power from solar panels is stored as thermal energy for up to two months and delivered when required as either heating or cooling – enabling full utilization of solar panels throughout the year.

A number of corporations have pledged to achieve net zero emissions by 2025. Our system can fully remove emissions associated with heating and cooling, saving an estimated 40 percent of energy consumption.

The thermal energy storage system uses a flexible rubber coated fabric tank to store hot and chilled water. The quantity of each is regulated by a controller that responds to temperature changes and weather forecasts, delivering heating or cooling as required.

Proof of concept has been confirmed through independent engineering
solar energy with blue sky

Our mission is to provide businesses and homeowners with energy-efficient solutions, helping reduce operational costs and lower environmental impact.

Utilise your solar and HVAC systems with renewable thermal energy storage tanks.

Polyweld Expertise Meets HVAC Innovation

HVAC TES draws from over five decades of experience at Polyweld, specialising in thermoplastic welding and industrial fabrication. As a trusted provider in the energy and construction sectors, we bring our proven craftsmanship to the HVAC industry with our TES tanks. Polyweld’s reputation for quality and innovation ensures that our thermal energy storage systems are not only durable but also environmentally friendly.
 
Our mission is to provide businesses and homeowners with energy-efficient solutions, helping reduce operational costs and lower environmental impact.
Polyweld HVAC TES thermal water tank under construction

Stuart Donaldson

Founder
Inventor, Visionary

ANJALI Donaldson

BBus
CFO, Team Builder

Chris Meneses

BEng Electronics
Kickstarter

Alex Solo

BSc Physics
Sales Champion

Tony Botta

BEng Mfg
Production Guru

How it works

Energy Efficiency Simplified
Thermal Energy Storage (TES) technology works by storing energy in the form of cold or heat using surplus rooftop solar or from the grid during off-peak hours when energy demand is lower and electricity is cheaper. The stored energy is then released during peak hours, reducing the load on HVAC systems and optimizing energy usage. This process not only improves efficiency, reduces operational costs and emissions.
 
At HVAC TES, our tanks are designed with advanced insulation and materials that ensure maximum energy retention. By integrating our tanks into your HVAC system, you can reduce the strain on your heating and cooling systems, extend equipment life, and contribute to a greener environment.
Polyweld HVAC TES tank construction

Why Choose HVAC TES?

A smarter way to manage energy in HVAC systems

Energy Savings

Cut down on energy costs by reducing peak demand with TES.

Sustainability

Reduce your carbon footprint by utilizing energy more efficiently.

Custom Design

Our tanks are tailored to meet the specific needs of your HVAC system.

Easy Integration

Seamlessly integrates with both new and existing HVAC systems.

Durability

Manufactured with unique high-quality materials, our tanks are built to last and withstand the toughest conditions.

Expertise

Backed by the proven track record of Polyweld in custom fabrication.

Thermal Energy Storage Tanks
for Every Application

Customisable TES tanks designed to meet your specific HVAC needs
Polyweld HVAC TES tank construction

Commercial Thermal Energy
Storage TES Tanks

Designed for larger systems, our commercial TES tanks ensure efficient energy storage for office buildings, shopping malls, and more. Their modular design allows for scalability, making them suitable for various commercial applications.

inner lining of polyweld hvactes tank

Residential TES Tanks

Our compact TES tanks are perfect for residential HVAC systems, offering energy savings and consistent comfort. Customized to integrate into an existing system or utilize an existing design to ensuring a smooth transition into a renewable system without compromising on performance.

Roof looking down on inside of water tank with liner

Industrial TES Solutions

For large industrial complexes, our heavy-duty TES tanks offer high storage capacity, ideal for  agricultural heating and solar powered, temperature controlled distribution centers.  Built to last, these Thermal Energy Storage tanks reduce peak demand loads, saving energy costs and enhancing system reliability.

Ready to Optimise Your HVAC System?

Reach out to us for a consultation or a customised quote.

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