Can an Indoor Heat Pump Provide Both Heating and Hot Water?

Yes—it can. Many modern indoor heat pump systems are designed to deliver both space heating and domestic hot water (DHW) from a single unit. These dual-function systems, often called combi heat pumps or two-in-one heat pumps, are increasingly popular in homes that prioritize energy efficiency and space-saving solutions.

Types of Two-in-One Indoor Heat Pump Systems

1. Air-to-Water Heat Pumps (Hydronic Systems)

These are the most common types of dual-function heat pumps:

• Provide underfloor heating or radiator-based space heating
• Heat water stored in a tank for daily domestic use (showers, taps, etc.)
• Popular in Europe and suitable for a wide range of climates

2. Ground Source (Geothermal) Heat Pumps

• Use underground energy for highly efficient operation
• Can manage heating, cooling, and hot water
• Higher upfront cost but lower long-term energy use

3. Split Systems with Integrated Tank Options

• Indoor unit connects to a fan coil for space heating and a hot water tank
• Some models include a built-in tank for hot water, offering a compact all-in-one solution

Benefits of Heating + Hot Water Indoor Heat Pump Systems

1. Save Space

• One system does the work of two
• Ideal for smaller homes or apartments with limited mechanical room space

2. Improve Energy Efficiency

• Heat pumps are significantly more efficient than traditional gas or electric systems
• Models with high COP (Coefficient of Performance) offer greater energy savings

3. Smart Integration

• Many units offer app control or smart scheduling
• Optimize heating and hot water based on usage patterns

Things to Consider Before Installing an Indoor Heat Pump

A. Installation Space

• Some systems include a built-in hot water tank—check that your indoor space can accommodate it

B. Climate Suitability

• Air-to-water systems perform best in mild to moderate climates
• In colder regions, choose models with auxiliary heating or integrated backup elements

C. System Design

• Proper sizing is critical: factor in your heating load and hot water usage
• A buffer tank or cylinder may be required for a stable hot water supply

Conclusion: A Smart All-in-One Heating Solution

A well-designed indoor heat pump system can effectively handle both space heating and domestic hot water, saving energy, space, and complexity. Whether you’re upgrading a home or designing a new energy-efficient system, these two-in-one heat pump units are a strong, future-ready solution.