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Heating the Home with Radiators

The Benefits of Radiators for Central Heating

Radiators provide a responsive and flexible heating option for both new and existing homes. They heat up and cool down quickly, so are ideally suited to New Zealand’s changeable weather conditions and the typically busy lifestyles of New Zealanders. Radiators are popular because they are:

  • Healthy: There are no forced air draughts or cold spots, and the radiant heat they produce reduces damp.
  • Responsive: Turn them on when you need them and off when you don’t, without having to wait long for them to kick in. It usually only takes 10 minutes for them to warm up.
  • Safe: Radiators are great for children, the elderly and pets. Their surface warms to between 60°C and 75°C so they will not affect curtains or furniture placed in close proximity. (For added safety, we also offer low surface temperature models for hospitals, rest homes and child care facilities.)
  • Controllable: All radiators are thermostatically controlled by thermostatic radiator valves (TRVs), and can be turned off individually or as a system. All systems also include time and temperature controls, allowing homeowners to tune a system to their individual preferences and requirements.
  • Stylish: They come in a variety of styles, all available in a standard white, which can also be painted to almost any colour you choose.

(They are also very effective at drying clothes on days when outdoor drying is not possible!)

Central Heating New Zealand supplies the world-renowned DeLonghi radiator range. Because of their low water content, they have a faster heat up time than most other radiators. DeLonghi radiators are designed to produce the greatest heat output from the most compact surface area. They are completely silent when operating. A wide range of DeLonghi radiators are available and come with a 25 year guarantee. We also have designer radiator options available on special order from Radiatori, Ridea and Sciroccoh.

How a basic radiator system works

How a basic radiator system works

Radiator Sizes

The size of the radiator installed in any room is determined by the specific heating requirements of the area (kW output), and the position of the radiator in the room. For example, there are long and low models for wide wall spaces, and taller models for narrow wall spaces.

Our standard DeLonghi radiators are available in three types: Type 11, which are 63mm thick; Type 21, which are 85mm thick; and Type 22, which are 102mm thick. They are available in sizes ranging from 400 to 1800mm wide and 300 to 900mm high. These types and sizes affect the amount of heat that the radiator puts out. Our system design engineers will determine the radiator types and sizes required to heat your home.

Custom coloured radiator

Custom coloured radiator

Coloured Radiators

Although they come standard in white, radiators can be coloured to match your interior decor. Match the colour of the radiator so that it blends into your wall covering or perhaps add contrast by getting the radiator painted a complementary colour. The radiator shown left is red to match the colour of the stairwell wall. Radiators can be ordered from the factory coloured or painted locally.

Designer Radiators

DeLonghi also produces a number of designer radiator models in a range of modern and traditional styles. Many people highlight these as decor features in their home because of their unique visual appeal, although their output is usually somewhat lower than models in the standard range. A popular choice among Kiwis is the Multicolonna radiator, which suits renovated homes well due to its traditional style. The designer range is available by indent order only.

Fan Coil Radiators

A fan coil radiator recessed into the wall and blending into its surroundings

A fan coil radiator recessed into the wall and blending into its surroundings

Just like traditional radiators, fan coil radiators use warm water transported from the heat source to heat the room. However, unlike traditional radiators, they do require mains electricity to run the fan, which draws cool air over the internal radiator fins and gently blows warmed air back into the room. They have some advantages over traditional radiators as they can put out large amounts of heat for a relatively small unit. This means that a smaller fan coil radiator can produce the same amount of heat as a larger traditional radiator. Operating temperatures can be lower than traditional radiators, which makes them well suited for retrofitting heating using a hydronic heat pump as the heat source. Unlike traditional radiators and underfloor heating, fan coil radiators can also be used to supply cooling when used with a reversible heat pump.

Fan coil radiators have individual electronic thermostats that will only heat or cool a room when hot or cold water is passing through them to prevent air being blown around needlessly. Fan speed can be controlled manually or automatically. They can be mounted on a wall as a freestanding unit, recessed into a wall, or completely concealed so that only the inlet and outlet grills show.

Radiator System Design Considerations

We design each radiator system to be the most efficient as possible given your home’s layout and your heating needs. To do this, there are important things we keep in mind when designing each radiator central heating system.

As with any service of this kind, careful consideration needs to be given to how the pipework will run within the house structure. In a warm water central heating system, pipework runs from the boiler to radiators situated throughout the house. In a wood framed home, pipes run through the framing timber like the electrical and plumbing services. In a house constructed of concrete, pipes can be run between wall and ceiling batons or chased into the wall.

Radiators are most effective when positioned in the coldest part of a room, where there is likely to be the greatest heat loss. We place radiators immediately below a window whenever possible. The next best location is elsewhere on an external wall. If neither of these can be achieved, we position radiators as close as possible to these points. Additionally, situating radiators under a protruding ledge, windowsill or mantle will help the heat to flow into the room.

DeLonghi Multicolonna radiator

DeLonghi Multicolonna radiator

It is not ideal to position radiators behind full length drapes, as heat will be trapped behind them and not directed into the room. Similarly, it is best to avoid placing radiators next to a bed’s headboard, or behind a solid object that will inhibit the natural spread of heat. We will work with you when designing your radiator system to ensure ideal radiator placement based on your rooms’ layouts.

To ensure an even temperature is achieved throughout the home, radiators should ideally be placed in every room, including hallways, toilets, bathrooms, bedrooms and living areas. In multi-storey homes, radiators should also be placed in upstairs rooms and on landings. Based on the UK standard, allowance is made for 25% of heat rising to the next level in a well-insulated home. We therefore factor a reduced output requirement in our calculations for upper levels. In some larger rooms it is preferable to split the total energy output required for one room over two radiators, which ensures an even temperature throughout the room.

When designed correctly, often a system will be capable of achieving a higher than recommended energy output, even at extremely low outside temperatures. Contact us to learn more about adding a radiator central heating system to your home.

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