Exploring the Heat Pump Types: Air-to-Water vs Air-to-Air System

India is now moving towards energy efficient products. And when it comes to water heaters, a heat pump is the ideal choice. But which heat pump type to choose? 

What are the different types of heat pumps?

There are different types of heat pumps. In this blog, we will discuss two types of heat pump systems:

  1. Air-to- water Heat Pump
  2. Air-to-air Heat Pump

In this blog, we will explore the features of each heat pump type and how they are different from each other.

Let’s get started!

1. Air-to-Water Heat Pump

An Air source Heat Pump is used not only for heating water, but also for heating and cooling air systems. As it serves many purposes, lesser number of electrical appliances are required, resulting in reducing costs.

How it works?

Most air to water systems have an outdoor unit positioned next to the house, and an indoor unit located inside the house. It consumes heat from the surrounding air. That heat is used to produce hot water or air, as per the requirement.

Advantages of air source heat pumps

  • This heat pump type can handle multiple tasks. This includes space heating, cooling, and producing hot water for domestic use. So, this makes them a comprehensive solution for Indian households.
  • These heat pumps can work seamlessly with underfloor heating systems, radiators, or even fan coil units. It provides flexibility in installation and integration.
  • Air-to-water heat pumps are highly efficient, particularly in mild Indian climates. This is because of their ability to transfer heat from the air to water or vice versa, reducing energy consumption and costs.
  • Air to water heat pumps is scalable and can be tailored to meet the demands of both residential and commercial properties, making them a versatile choice.

Air source heat pump disadvantages

  • The air source heat pump installation often requires additional plumbing and piping, which can increase the overall costs compared to air-to-air systems.
  • Due to their complexity, air-to-water heat pump type may require more frequent maintenance and servicing, potentially leading to higher long-term costs.
  • For hot water production, air-to-water heat pumps typically require a separate buffer tank for storage, adding to the installation complexity and space requirements.
Heat Pump Water heaters. Which is better?Air-to-water Heat Pump vs Air-to-air Heat Pump! Which one is best for Indian Homes?
Which heat pump type would you choose for your home?

2. Air-to-Air Heat Pump

Air to air system also consumes heat from the environment. The heat is then compressed and pumped into the house.

With this heat pump type, warm air is released directly from the system, unlike air-to-water systems where heat is moved to the central heating system and then distributed through underfloor heating or radiators.

Benefits of Air-to-air system

  • Air-to-air heat pumps are generally less expensive to install compared to air-to-water systems, as they do not require additional plumbing or piping.
  • These systems are relatively straightforward to install and maintain, making them a convenient option for Indian households.
  • Air-to-air heat pumps can be integrated with existing ducting or used as split units, allowing for flexible installation options.

Limitations of Air-to-air system

  • While air-to-air heat pumps excel at heating and cooling, they do not provide hot water production capabilities. This might be a requirement for some Indian households.
  • In regions with particularly cold winters, air-to-air heat pumps may require supplementary heating sources.
  • The outdoor units of air-to-air heat pumps can generate noise, which may be a concern in densely populated urban areas or residential neighborhoods.


Heat pumps help you to save energy and cut down your costs. Both air-to-water and air-to-air heat pumps present viable options for Indian households. You need to choose the appropriate heat pump type as your requirement.

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