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A Two in One Tank, also known as a Combination Water Tank, Combination Cylinder, or Twin Coil Cylinder in different international markets, combines domestic hot water storage and system thermal storage into a single integrated unit.
Instead of installing separate tanks for hot water and heating, homeowners can simplify the entire heating system with one compact solution. This integrated design reduces installation space, simplifies pipework, and improves overall system efficiency, making it an ideal choice for modern homes using heat pumps, solar thermal systems, or hybrid heating solutions.
Whether installed in apartments, family homes, or larger residences, a Combination Water Tank delivers reliable domestic hot water while supporting efficient heating system operation. It offers homeowners a cleaner installation, improved energy performance, and greater flexibility for future energy upgrades.
Choosing a Combination Water Tank is about more than saving space—it's about creating a heating system that is easier to install, easier to manage, and more efficient throughout its service life.
Our Two in One Tank is designed to support modern residential heating systems with advantages that benefit both homeowners and installers.
Every home has different heating requirements, which is why we provide flexible Combination Water Tank solutions for a wide range of residential projects.
Typical applications include:
Rather than offering a one-size-fits-all product, we provide customized solutions based on different household layouts, installation environments, and local market requirements.
A Two in One Tank is often the central component of an integrated home heating system. Our engineering team works closely with distributors, system integrators, and heating brands to develop solutions that balance installation convenience, energy efficiency, and long-term performance.
We offer flexible customization options including:
Whether the project focuses on compact urban apartments or spacious family homes, we help customers develop Combination Cylinder solutions that deliver reliable hot water while simplifying the entire heating system.
A heating contractor in the Netherlands was upgrading a newly built four-bedroom family home equipped with an air source heat pump and underfloor heating. The original design required a Domestic Hot Water Cylinder and a separate buffer tank, resulting in limited installation space and a more complicated piping layout.
After switching to our Two in One Tank, the contractor replaced both tanks with a single Combination Water Tank. The integrated design reduced installation space, simplified pipe connections, and shortened installation time. The homeowners now enjoy stable hot water for two bathrooms while the heat pump operates more efficiently during periods of high demand.
This project demonstrates how a well-designed Combination Cylinder can simplify residential heating systems while improving comfort, installation efficiency, and long-term energy performance.
A Two in One Tank integrates the functions of a Combination Water Tank and thermal storage into a single unit. Compared with installing separate tanks, it requires less installation space, fewer pipe connections, and simplifies the overall heating system while maintaining reliable domestic hot water performance.
Yes. A Combination Water Tank is specifically designed to work with modern air source and ground source heat pump systems. It stores domestic hot water while supporting efficient heat pump operation, making it an excellent solution for energy-efficient family homes.
Absolutely. A Twin Coil Cylinder is commonly used in renewable energy systems because one heat exchanger can be connected to solar thermal collectors while the second coil works with a heat pump or boiler. This design improves renewable energy utilization and provides greater flexibility throughout the year.
The ideal Combination Cylinder depends on the number of family members, daily hot water consumption, the number of bathrooms, and the heating system being used. Selecting the appropriate capacity helps ensure stable hot water supply, better energy efficiency, and long-term operating performance.
Benefit from 24/7 hot water with our efficient heaters, ensuring constant warmth and convenience.
Maximize energy efficiency with our advanced water heaters, reducing costs while providing reliable hot water.
Promote eco-friendliness with our Green House water heaters, designed for minimal environmental impact and optimal energy savings.
Tailor your hot water experience with our customizable water heaters, offering personalized settings to meet your unique needs.
