Frequently Asked Questions
A list of your frequently asked questions that families, business and individuals may have on hydronic heating.
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Can I integrate a hot water into a hydronic heating system?
Yes, this can be done via a combination cylinder (buffer + hot water tank in one) or a hot water coil tank.
Can my hydronic heating system also heat my pool?
Yes, pool heating can be done via a combination cylinder or using a hot water coil tank.
Do I need a split system aircon to provide cooling over summer?
No, some air sourced heat pumps are "reverse cycle", and can offer cooling in the summer time. This is often only seen in premium-branded air source heat pumps. The hydronic heating system must also be adequately sized in terms of kW output.
What happens if the heat source is not big enough/does not have adequate output?
If the heat source does not meet the heating demand, the system will not be able to heat or cool the house properly.
Can I put an in-slab hydronic system on first/second level? What about hydronic heating on wooden floors?
Yes – "in-screed" heating can be used on top of a timber framed first floor. Certain types of timber flooring carry approvals for underfloor heating, but generally the performance isn’t as good.
How much money do I save with a heat pump hydronic heat source compared to gas?
This can be a difficult question to answer as it really depends on tariff rates. However, you would generally use 5-6 times less energy vs natural gas or LPG.
Do I need three phase power for a hydronic heating system?
It really depends on the system design. Systems utilising a heat pump or a booster element may require 3 phase power connection, however premium branded heat pumps may be offered with both three and single phase varients.
Can I place tanks and equipment outside?
Generally all hydronic system elements are stored indoors inside a basement or plant room. Some heat pumps and cylinders may be able to be placed outside, however it is always best to check with the manufacturer. Keeping hydronic heating components indoors will minimise heat loss and running costs.
How many heating zones can be configured with a hydronic heating system?
Total number of zones is unlimited when using a buffer tank. This is because buffer cylinders can ensure a minimum flow rate is met with the heating source. There are various types of zones which can be made, such as underfloor heating, skirting board heating, in-wall heating, radiator panels, fan coil units and more.
Do hydronic heat pumps have to be located on the sunny side/end of the house?
Not at all. In fact, various heat pumps from premium manufacturers can be installed indoors. This is often helpful when outdoor space is valuable or limited.
Can I replace my old gas boiler with a heat pump hydronic system?
Yes of course – a heat pump will be around 5-6 times more efficient than a gas boiler.
I'm off grid, can I run a heat pump system off of solar PV only?
Yes, smart controls in premium-branded heat pump managers allow for integration with energy management systems and smart solar PV inverters.
Do I need a buffer tank for my hydronic heat pump install?
Not always, but buffers provide many benefits to a hydronic system.
Can I control the pump via bluetooth/an app?
Depending on the brand of hydronic heating system. Most hydronic systems with heat pumps as the heat source are able to be controlled online via an app or web browser.