What Is a Domestic Hot Water Heat Pump?
A domestic hot water heat pump (DHW heat pump) is a highly efficient, all-electric water heating system designed to supply a commercial building with its daily hot water needs. Unlike standard gas boilers that burn fossil fuels to generate heat, a DHW heat pump uses electricity to transfer existing heat from one place to another. This makes it a significantly cleaner, greener, and more sustainable alternative to traditional water heaters.
By integrating with the building's HVAC system, it uses heat that would otherwise be wasted, producing temperatures up to 175°F (79°C).
How a DHW Heat Pump Works
Instead of letting excess heat from your building go to waste, a water-source DHW heat pump captures wasted thermal energy from your building’s existing HVAC systems, like chillers and cooling towers, or from external water sources, such as geothermal loops, underground pipes, or nearby lakes.
An air-source DHW heat pump acts as a thermal conveyor belt by extracting heat energy from the outside air and moving it into the building's domestic hot water supply.
Using a refrigeration cycle, the heat pump amplifies this captured heat and transfers it directly into your facility’s domestic water supply.
Because it moves heat rather than generating it, a domestic hot water heat pump delivers several times more heating energy than the electrical energy it consumes—measured as coefficient of performance (COP). Trane’s commercial units combine the compressor, controls and heat exchanger in a compact monobloc design for easier installation.
Benefits of Domestic Hot Water Heat Pumps
Investing in a DHW heat pump offers operational, financial, and environmental advantages:
- Decarbonization and sustainability: By eliminating the need for natural gas and utilizing waste heat, DHW heat pumps significantly lower your building’s carbon footprint, helping you meet strict modern sustainability goals.
- Space-saving design: Trane's units feature a monobloc modular design. This means fewer components and the ability to stack units with zero-clearance, saving highly valuable floor space in your mechanical room.
- Smart building integration: Commercial hot water heat pumps easily integrate with your existing building management system (BMS) via standard BACnet controls, allowing for remote monitoring.
- Simplified maintenance: By sourcing both your HVAC chiller system and your hot water system from a single supplier like Trane, you streamline your equipment integration and only have to make one phone call for service, supported by a massive network of factory-trained technicians.
When to Consider Installing a DHW Heat Pump
Because of its high capacity and ability to recover waste heat, a commercial hot water heat pump is ideal for large facilities that require a reliable, high-volume supply of hot water. Top applications include:
