Are you looking to upgrade your heating and cooling system at home (or business premises)?
Are you interested in hydronic systems and know how energy-efficient they are at heating, but are unsure about their cooling capabilities?
If this is you, and you are interested in learning how hydronic heat pumps are transforming the way we don’t just heat, but also cool our Australian homes, then this third article of our Homeowner’s Guide to Hydronic Heat Pumps and Hydronic Systems is for you.
Before we get going. If you are new to hydronic heat pump systems, check out our first two articles in this Series:
When most people think of hydronic heat pumps or hydronic systems, they think of heating, or heating and domestic hot water only .
But here’s what many Australian homeowners don’t realise. Modern hydronic heat pump systems can also cool your home.
And in many cases, they do it more comfortably and quietly than traditional air conditioning.
So how does hydronic cooling work? And is it a viable alternative for Australian homes in summer?
Let’s break it down.
How Does Hydronic Cooling Work? (Quick Answer)
Hydronic cooling works by circulating chilled water through pipes connected to fan coil units, underfloor piping, or radiant panels, which absorb heat from the air and lower indoor temperatures without blowing cold air like traditional systems.
Getting into the Details: How Does Hydronic Cooling Work?
Hydronic systems cool by efficiently extracting heat from your home and circulating cool water and air into each room. By simultaneously extracting heat while circulating cool water and air, hydronic systems deliver high levels of energy efficiency, comfort and air quality.
Here’s a simple step-by-step explanation:
The Heat Extraction Process
Fan Coil Units like the Italian-made Maxa range and radiant panels absorb the heat from the air and surfaces in a room and transfer the heat to the hydronic heat pump that transfers the heat outside. See the above diagram.
The Cooling Process
As well as extracting heat from your home, the hydronic system delivers cooling to each room. Below is an overview of the hydronic cooling process:
1. Heat Pump Chills the Water
The hydronic heat pump, like the Maxa R290 heat pump range below, chills the water in your buffer tank.
2. Chilled Water Circulation Through Pipes
This cooled water then flows through a network of pipes installed in your home.
3. Cooling Is Delivered Through Heating and Cooling Components of the Hydronic System
Cooling is released via:
a. Underfloor systems and radiant panes
b. Fan coil units (most common)
Why Does Hydronic Cooling Feel So Comfortable)
Many homeowners describe hydronic cooling as feeling more “natural.”
Here’s why:
✅ Cleaner Air, Less Dust: As hydronic systems do not cool by pushing air around your home, they don’t circulate dust or allergens. Perfect for people who suffer from allergies.
✅ Silent Operation: Perfect for bedrooms and living spaces.
✅ No Cold Air Drafts: You won’t experience waves of uncomfortable, cold air.
✅ Less Dry Air: Unlike many air conditioners, hydronic systems don’t strip moisture from the air as aggressively.
What is a Fan Coil Unit?
Fan coil units are the most common way, and one of the most effective ways to deliver hydronic cooling. A fan coil unit, also called an FCU, like the units pictured below, delivers chilled air via heat exchangers within the unit. They are highly versatile and can be installed in walls, ceilings, floors and bulkheads, offering a single-room or whole-home cooling solution.
What are the Main Benefits of Fan Coil Units
- They combine the efficiency of hydronic systems with the responsiveness of air conditioning.
- Refrigerant leak risk is eliminated in the building, as the installation includes water pipes only and no refrigerant pipework.
Can You Use Underfloor Cooling in Your Home?
Underfloor hydronic systems can provide your home with both heating and cooling. Cooling is provided when the system circulates cold water through the in-floor piping, and the slab absorbs the heat from your room, reducing the overall temperature. Underfloor cooling provides a silent and even temperature, with no drafts. However, if you want fast space cooling, the underfloor heating and cooling system is best paired with fan coil units.
When planning your hydronic system, we recommend consulting a trained installer to provide recommendations for your system design. Get in touch with our team today to get connected with our hydronic experts in your region. We are here to help you find the best solution for your home. Click here to contact our team.
Hydronic Cooling + Heating + Hot Water: In One System
One of the biggest advantages of hydronic heat pump systems is that it provides an integrated solution for your space heating and cooling, plus your hot water supply.
A single system can provide:
- Winter heating
- Summer cooling
- Year-round domestic hot water
This simplifies your home’s infrastructure and improves overall efficiency.
Energy Efficiency: How Does a Hydronic System Compare?
Hydronic cooling systems powered by heat pumps are highly efficient.
Key Benefits:
- Lower energy consumption vs traditional systems.
- Reduced peak electricity demand.
- Solar integration is possible.
This makes them a strong option for energy-conscious homeowners.
To Find Out More, Get in Touch
If you are an installer, homeowner, or business owner and you are looking for more information, contact our Next Cycle today, and we will help you find the solution that meets your needs.
Next Cycle are hydronic heat pump, hydronic heating, cooling and domestic hot water experts in Melbourne and Victoria, New South Wales, Canberra and the ACT, Tasmania and Queensland.
Frequently Asked Questions (FAQ)
Common questions about hydronic systems
Q. Can hydronic cooling replace my air conditioning?
Yes, in many homes, especially when designed properly.
Q. Is it expensive to run?
No. Heat pump systems are among the most efficient cooling options available.
Q. Does it replace my hot water system as well as my air conditioning?
A. Yes. Many hydronic systems integrate domestic hot water.
Q. Can I install hydronic systems in an existing home?
A. Yes. Heat pumps, radiators and fan coils can be retrofitted into a home.
Q. Does hydronic cooling feel as cold as air conditioning?
It feels different. Less harsh, but still effective at lowering room temperature.
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