Speedheat Underfloor Heating

How does underfloor heating affect my energy consumption?

Energy consumption depends on each individual's comfort needs.  However, 1kW of floor heating will be more efficient and cheaper to run than a 1 kW conventional heater, due to thermostat control and the even spread of the heating over the floor surface.  You can save up to 50% on running costs by installing proper flooring insulation and the correct use of programmable controllers.

One must also remember: floor heating is not the only contributor to a higher electricity bill in winter. In winter geyser duty cycles are longer, lights are on longer, stoves and ovens are used more compared to summer braais and salads.

Speedheat supplies various types of insulation which can be retrofitted on top of your existing floor. The type of insulation depends on the available build-up height. For more information, call us on our toll free number: 0800-112215.

How does a thermostat reduce energy consumption?

A thermostat will ensure optimum comfort while running of the system remains cost effective. 

The desired temperature (called the setpoint) is programmed into the thermostat.  Once this setpoint is reached, the thermostat automatically switches the heating on and off, maintaining the room temperature at this set point.  This means that your heating system is working a 50% duty cycle, it is not demanding a continuous supply of electric current, hereby reducing your energy consumption.   Read more on thermostats.

How do I calculate the running costs?

This depends on your current electricity rate (R/kWh) and the occupancy in a room.  If the rate is R1.44/kWh and a heater with a capacity of 2000 watts is installed in a 20m² room, for example, the calculation would be as follows:

2000 W / 1000 = 2kW.

2kW x R1.44 = R2.88 p/hour.  (for the first hour only)

Remember that with the use of a thermostat, this would be the running cost for the first hour only (or the amount of time taken to reach the set temperature).  Once the room is warmed up, the heating system will run typically at a 30-50% duty cycle (depending on the outside temperature), this means the running cost would be < R2.88 p/ hour thereafter.  Also with the installation of floor insulation, your heating system will reach the set temperature much quicker (usually between 30 - 45 minutes depending on the floor finish) positively influencing your running cost within the first hour.  Some rooms have less occupancy, for example, bathrooms.

Let's look at running an underfloor heating system in a bathroom:

For this example, let's assume a medium sized bathroom of 9m² and a heater with a capacity of 950 watts is installed.  The calculation would be as follows:

950 W / 1000 = 0.95 kW.

0.95kW x R1.44 = R1.37p/hour for the first hour only.  After the first hour, your running costs should reduce to about R0.68 p/hour.  

Also, remember that bathrooms are generally used for the first 3 hours in the morning and 3 hours in the evening at the most when everybody is home from work and school again.  

As mentioned, these costs will also be reduced with the installation of floor insulation underneath the floor heating system.

Should the system be kept running throughout the whole of winter or is it cheaper to turn off and on as required?

This depends largely on the user and how frequently a room is being used. 

Not much energy is saved by maintaining a lower temperature when the rooms are not in use.  The heating system will however warm up much quicker when needed the next time, so it is advisable for a living room that is used everyday all day for example.

Is Speedheat expensive to maintain?

Not at all! Speedheat is maintenance free and has a lifetime expectancySpeedheat offers a 7 year product AND installation warranty for complete peace of mind!