Metropolitan Heating and Cooling

Hydronic Heating: Advantages, Installation and Maintenance

As winter sets in and temperatures drop, nothing is more appealing than coming home to a warm and inviting space.

If you’re tired of high energy bills and noisy heating systems, it’s time to discover the reasons why to choose hydronic heating.

Imagine a home heating system that keeps you comfortably warm, operates silently, improves air quality, and reduces your carbon footprint. Hydronic heating offers all these benefits, making it an ideal solution for homeowners seeking an energy-efficient and effective way to heat their homes.

Learn why hydronic heating is the best solution for superior comfort and energy savings. So, read on.

What is Hydronic Heating?

Hydronic heating, also known as radiant heating, is a method of heating that uses hot water or another fluid to transfer heat throughout a building.

Unlike traditional forced-air heating systems that blow warm air into rooms, hydronic heating relies on the circulation of heated water to provide comfortable and consistent warmth.

How Does Hydronic Heating Work?

Hydronic heating uses hot water or another fluid to transfer heat throughout a building, providing comfortable and consistent warmth. The system typically consists of a boiler, a network of pipes, and heat emitters (such as radiators or underfloor pipes). Let’s take a closer look at how each component plays a role in the functioning of a hydronic heating system:


The heart of the hydronic heating system is the boiler. It is responsible for heating the water to a controlled temperature, usually between 140°F to 180°F (60°C to 82°C). The type of heat source used in the boiler can vary, with natural gas, electricity, or heat pumps being common options. The boiler ensures a steady supply of hot water circulates through the system.


Once the water is heated, it is distributed through a network of pipes, usually made of copper, PEX (cross-linked polyethylene), or steel. These pipes are carefully installed throughout the house, hidden behind walls, under floors, or within ceiling spaces. The piping system forms a closed-loop circuit, allowing the water to circulate continuously.

Heat Emitters

The heat emitters are the devices where the thermal energy from the hot water is released into the rooms. Hydronic heating systems’ most common heat emitters are radiators, radiant panels, or underfloor pipes.

  • Radiators: Radiators are metal panels with fins or tubes that disperse heat through convection. As the hot water flows through the radiator, the metal heats up, and warm air is released into the room, creating a comfortable atmosphere.
  • Radiant panels: Radiant panels are usually installed in walls or ceilings and emit infrared radiation, which heats the objects and surfaces in the room, providing a cozy and even warmth.
  • Underfloor pipes: Underfloor heating systems consist of pipes installed beneath the floor surface. The hot water running through these pipes heats the floor, which, in turn, radiates heat upwards, warming the entire room from the ground up.

Pump and Control System

A circulation pump efficiently keeps hot water moving through the closed-loop system. Additionally, the system is controlled by a thermostat, which allows users to set the desired indoor temperature.

When the room temperature drops below the set point, the thermostat signals the boiler to heat the water, and the circulation pump starts moving the hot water through the pipes to the heat emitters.

Hydronic heating

Energy Transfer and Heat Distribution

As the hot water flows through the pipes and reaches the heat emitters, it transfers its thermal energy to the surrounding air or surfaces. This process ensures a steady and consistent heat distribution throughout the building, providing a comfortable and warm living space.

Hydronic heating operation is a sophisticated yet efficient process that utilises hot water to provide consistent warmth and comfort to homes. By understanding how the boiler, pipes, and heat emitters work together, homeowners can make informed decisions when choosing this energy-efficient heating system for their living spaces.

Benefits of Hydronic Heating

Among the key benefits of a hydronic heating system are:

  • Energy efficiency: Hydronic heating operates at lower temperatures than traditional forced-air systems, making it highly efficient. Using water as a heat transfer medium requires less energy to achieve the desired indoor temperature, reducing energy consumption and lowering utility bills.
  • Silent operation: Unlike forced-air systems that can be noisy, hydronic heating works silently, providing a peaceful and serene environment within your home.
  • Superior comfort and zone heating: Hydronic systems allow different temperatures to be set in various rooms, enabling zone heating. This means you can tailor the heating to suit individual preferences and needs, enhancing overall comfort.
  • Reduced air circulation: With hydronic heating, there is no need for air circulation, meaning dust and allergens are not blown around the house. This improves air quality, making it an excellent choice for allergy sufferers.
  • Longevity and low maintenance: Hydronic systems are known for their durability, with properly installed and maintained systems lasting for decades. Additionally, the lack of air circulation reduces the accumulation of dust and debris in the system, leading to lower maintenance requirements.
  • Environmentally friendly: Hydronic heating is environmentally friendly, particularly when paired with a high-efficiency heat source such as a condensing boiler or heat pump. It helps reduce your carbon footprint by consuming less energy and operating at lower temperatures.

Installation of Hydronic Heating Systems

The installation of a hydronic heating system is complex and should only be done by a qualified plumber. The steps include:

  • Boiler selection: The first step in installing a hydronic heating system is selecting the appropriate boiler. The boiler serves as the heart of the system, heating the water that will be circulated throughout the house. Choosing a boiler that matches the size of your home and heating requirements.
  • Radiators and underfloor heating: Next, you’ll need to decide on the heat emitters, which can be radiators, radiant panels, or underfloor heating pipes. Radiator panels are a popular choice due to their excellent heat conduction and extensive range of designs. On the other hand, underfloor heating offers a discreet solution that creates warmth from the floor up.
  • Pipe installation: Once the components are chosen, the installation involves laying the pipes or tubing throughout the house. These sealed pipes will carry the heated water to the heat emitters, where the thermal radiation will release the heat into the rooms.
  • Professional installation: Installing a hydronic heating system is a complex process that requires professional expertise. Hiring a certified HVAC technician or a hydronic heating specialist will ensure a safe and efficient installation.

Hydronic heating

Maintenance of Hydronic Heating Systems

It’s important to maintain your hydronic heating system in the following ways:

  • Regular checks: Hydronic systems are relatively low maintenance, but regular checks are essential to ensure optimal performance. Check for leaks, pressure levels, and any signs of corrosion or damage.
  • Flushing the system: Flushing the system and refilling it with clean water at least once every few years will help prevent corrosion and maintain system efficiency.
  • Ongoing running costs: While the initial installation cost of hydronic heating may be higher than some other systems, it’s efficiency and low maintenance requirements make it cost-effective in the long run.

Hydronic heating is undoubtedly one of today’s best options if you’re looking for a long-term, energy-efficient heating solution that provides consistent warmth and comfort.

Elevate Your Comfort with Metropolitan Heating and Cooling

Metropolitan Heating and Cooling is your go-to company for all things hydronic heating. Our expertise brings you the advantages of an efficient hydronic system, the cosy warmth of radiant heat, and the convenience of ducted heating. Our panel radiators and heated towel rails offer ultimate comfort in the colder months.

Say goodbye to other heating systems and embrace the excellence of home hydronic heating. Trust us for reliable installation and expert maintenance, ensuring your home stays warm throughout the year. Choose Metropolitan Heating and Cooling for a cosy and energy-efficient living space.

Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.

Published: 3 October 2023