What is a heat pump water heater compared to an electric water heater?

Heat Pump Water Heater: Reduced Environmental Impact, Greater Savings

This type of water heater combines a heat pump to produce domestic hot water. The heat pump captures calories naturally present in the air (a process called aerothermal energy) to heat the water. The result is an eco-friendly and economical solution, as the energy source (air) is renewable, free, and inexhaustible.

While heat pump water heaters still consume electricity, they use significantly less compared to standard electric water heaters, making them a more sustainable option. It will produce more energy for the same electricity consumption.

How Does a Heat Pump Water Heater Work?

It consists of a tank and a heat pump, which may be integrated or separate.

The heat pump collects air through the fan directing it through the evaporator, which heats the fluid. This heat is transferred to the water in the tank via a condenser. The tank stores the hot water until it’s needed.

If the heat pump cannot produce enough hot water (e.g., during extended periods of intense cold or system malfunction), an integrated resistance heater takes over to ensure a consistent supply. These heaters also include anti-corrosion technologies such as magnesium anodes, ACI (active current anode), or ACI Hybrid for added durability.

Types of Heat Pump Water Heaters

Heat pump water heaters are available in several configurations, each tailored to different installation setups and needs. These variations allow them to adapt to various types of homes and spaces, ensuring optimal performance and efficiency:

1. Ambient Air Models
   These models operate by capturing air directly from the room in which they are installed. They are ideal for spaces like laundry rooms, basements, or garages, provided the room meets specific requirements such as minimum volume and temperature. Since they rely on ambient air, their installation is straightforward and does not require additional ductwork, making them a popular choice for quick and simple integration into a household.
2. Outdoor Air Models
   Designed to draw air from the exterior of the building, these models utilize a system of ducts to extract and channel outdoor air into the heat pump. This setup allows for greater flexibility in placement, as the unit does not depend on the conditions of the indoor environment. It is a suitable option for both heated and unheated spaces, offering consistent performance even in colder climates.
3. Outdoor Unit Models
   Featuring a separate external unit, this configuration is perfect for homes where space indoors is limited or where outdoor installation is preferred. The external unit captures and processes the air before transferring the heat to the water tank inside the home. This type of model is particularly efficient in minimizing indoor noise levels and maximizing system capacity.
4. VMC (Mechanical Ventilation System) Models
   These models are integrated into a home’s mechanical ventilation system, allowing them to utilize the ventilation air for heating purposes. This configuration is ideal for homes equipped with centralized ventilation systems, as it repurposes the airflow for added efficiency. Not only does this help in maintaining a comfortable indoor environment, but it also contributes to significant energy savings by using an existing system for dual purposes.

Atlantic’s Heat Pump Water Heater Range:

• Egeo & Explorer: Floor-standing models 
• Calypso VM: Wall-mounted models

Installation

Heat pump water heaters can be installed in houses or apartments, new constructions, or renovations. They can function in heated or unheated rooms, depending on the model and configuration.

• For apartments: Opt for models, such as the Calypso VM. Installation can take place in non-living areas like laundry rooms, hallways, or bathrooms.
• For houses: You have more flexibility with models like the Calypso, Explorer, or Egeo. 

Placement Guidelines

Models that draw ambient air must be installed in an unheated room with a minimum temperature of 5°C and a volume of at least 20m³ to ensure optimal operation of the heat pump. Suitable locations include a laundry room, garage, basement, or pantry.

In contrast, outdoor air and split models are more flexible. These can be installed in either heated or unheated rooms with a year-round minimum temperature of 1°C, such as a garage, pantry, laundry room, entryway, or basement. The wall-mounted version of the Calypso ambient air model can even be installed in a kitchen or bathroom.

Ease of Use and Maintenance

Daily use of this equipment is straightforward as it functions similarly to a traditional water heater. Minimal maintenance is required, with a recommended inspection every two years.

Choosing the Right Capacity

To estimate the capacity you need, try our capacity calculator:
What capacity for my water heater?

At Atlantic, heat pump water heaters are available in the following capacities: 100L, 150L, 190L, 200L, 230L, 250L, 260L, and 270L. These options cater to a variety of needs, from households of two people to larger families with multiple water outlets (e.g., showers, sinks, and basins).

Advantages of Heat Pump Water Heaters

• Reduced Environmental Impact: Utilizes air as the primary energy source, eliminating the need for fossil fuels. This is why it is often considered an "eco-friendly" solution.
• Economical: Lowers energy consumption, resulting in reduced electricity bills.
• Reliable and Durable: Thanks to advanced anti-corrosion technology like ACI Hybrid.
• Comfortable: Provides hot water quickly, with intuitive digital controls. All Atlantic models also feature smart connectivity and intelligent functionalities.
• Energy Efficiency: Enhances the energy performance certificate (DPE) rating of your home. Use our DPE simulator to assess your home's energy rating.

Installation Recommendations

For the installation and maintenance of a heat pump water heater, it is essential to work with a professional. These devices are more technical than standard water heaters, and proper installation ensures long-term reliability.

We recommend contacting several professionals to compare quotes. Each installer should visit your home to provide a tailored estimate and guide you on any additional work that may be required.