Is hydronic underfloor heating right for me?Display/Hide
If we can put pipes in your foundation, then yes!!!
Hydronic underfloor heating is superior to all other forms of heating. The luxurious comfort is unbeatable. And it can be really simple and cost-effective.
Anyone building a new house will get a benefit from hydronic underfloor heating compared to just installing wall-mounted heat pumps. How to get maximum benefit requires consideration of insulation, house orientation to north etc. There are a few things to consider. Talk to our team to find out more.
How does it work?Display/Hide
Underfloor heating has been used for centuries. The Romans used it for home heating about over 2000 years ago.
At warmth.nz, we use heat pumps heat water and circulates it through a network of pipes laid in the floor. The house is divided into a series of areas and controlled by a manifold placed inside the house. By circulating the water on a frequent basis the slab is evenly heated. Overall control is set by a thermostat placed in a neutral heat zone in the house. This means it will not shut down due to high heat from the sunny side of the house and keep on running due to being on the cold side of the house. The temperature can be programmed to go down to a predetermined temperature before the heat pump starts heating the slab up again. Hydronic heating with water pipes in the slab is simply the best way of heating a home.
More about pipes in the foundation:
How much does the system cost to install?Display/Hide
Every home is different. The best way to find out is to send a quote request along with your house plans to email@example.com. We offer free quotations.
Here is a quick price guide:
Why air-to-water heat pumps?Display/Hide
Energy Efficiency and Conservation Authority strategy manager Michael Henry said “a heat pump hydronic system would be much more efficient than an electrical underfloor system, and this was similar to the relative difference between an electrical convection heater and a heat pump.”
Is it expensive to run?Display/Hide
To maintain the same temperature, the system is only replacing the heat the house losing. The less heat the house loses, the less the system needs to run. Every house is unique with its design, thermal insulation, solar gain and other factors. Some houses would cost more to run than others.
A heat pump hydronic system would be much more efficient than an electrical underfloor system.
“Christchurch builder Glen Davidson installed underfloor heating in his 300 sqm family home and now recommends it for all new houses.
Davidson said he kept his underfloor heating on for five months straight through the winter and it had added about $10 a week to the family’s power bills.”
NZ Central Heating Institute: Running Costs
Do the heat pumps (air-to-water) work on cold days?Display/Hide
Yes, the heat pumps will defrost itself and it will work under conditions below zero degree Celsius. However, it not quite as efficiently as on warmer days(4:1). Note – a slab can store a lot of energy, so a house will not get really cold in winter – whatever the weather.
Will it affect my (wooden) floor?Display/Hide
No. If the slab is prepared properly and the wood applied correctly, the heat in the slab won’t affect flooring. Some carpet underlays may act as a thermal barrier, and you should check this with your carpet supplier. The maximum floor surface temperature is 25 degree Celsius.
Can I alter the temperature room by room?Display/Hide
You can turn rooms off but generally leaving them on means the house is evenly heated with minimal losses. The flow through every run of pipe can be adjusted to lower the relative temperature – hence it is easy to reduce bedroom temperature for example.
Why do I want to use a heat pump for hot water?Display/Hide
It’s a pure money winner that every family should take advantage of – simply the best risk-free investment you can make. Read more:
Should I use one heat pump or separate heat pumps for underfloor and hot water?Display/Hide
In some cases, one heat pump will work perfectly fine to do both underfloor heating and hot water heating. However, we reckon to have two seperate heat pumps can be more beneficial in most cases. In summer, the underfloor heat pump can be switched for cooling while the hot water heat pump carries on heating the water as normal. The cost of two heat pumps is only marginally more expensive than having one large heat pump.
How do I get the best results?Display/Hide
This varies from house to house and personal comfort levels. We can advise on who to talk to regarding insulation, building materials, thermal gain and losses. We can also provide information on the best size of heat pump for in-slab heating and hot water heating. Hot water heat pumps are as efficient as conventional high wall heat pumps. However, the whole house is heated and there are no draughts.