How long should underfloor heating take to heat up?

Author: Tyrell Sporer  |  Last update: Wednesday, June 4, 2025

With this system, it can take only a few minutes to begin heating up, reaching the desired temperature within all rooms in the house within about 15 minutes. For underfloor heating, it can take up to 4 hours or more to reach a comfortable room temperature and this is due to several different reasons.

How long should it take for underfloor heating to warm up?

When you first turn on the heating, the energy is distributed both laterally (across the floor) and vertically (upwards into the room). This means it takes time for the entire system to reach its optimal temperature. In a medium-sized room, starting from a completely cold state, this can take up to four hours.

Why does my heated floor take so long to heat up?

Yes perfectly normal. Remember it is a fairly low power heat system and takes time to transfer in to the floor tiles. It best to switch it on about an hour ahead of when you need it to allow for the delay.

Why is my underfloor heating not getting warm?

Trapped air is the most common problem with a malfunctioning underfloor heating system, especially one that uses hot water flowing through sub-floor pipe work. Air can get caught up in the pipe and stay there, causing issues with the whole system.

How do I know if my underfloor heating is working properly?

First thing turn up the stat for just that room. Check flow and pipe temperatures on that loop warm up (and that no others do). Wait 1-2 hours. Then see if you can detect any change in floor temperature in that room. If not go looking to see if the floors in any other rooms are showing evidence of warming up.

How long does it take floor heating to heat up the room - Hydronic floor heating - Perth

Why is underfloor heating so slow?

The level of insulation in the room and the floor is probably one of the single biggest factors that will affect the heat up times of your Underfloor Heating.

Why is my heated floor not getting hot?

This can be caused by a faulty thermostat or zone value or damaged heating cables or mats. The culprit could also be tripped circuit breakers, where your electrical box is tripped by faulty or broken wiring, or over-consumption of electricity.

Should underfloor heating be warm to touch?

It can take a while to get used to the difference, so don't worry if things feel a little strange at first. As a general rule of thumb, your heated floor shouldn't feel hot - it should just not feel cold.

Why is underfloor heating not good?

And the cons

UFH can take slightly longer to heat up than radiators, which reach higher temperatures faster. But, with timers and smart controls, you'll be able to plan when you need your room to be cosy and warm. It's not always an ideal choice for really old buildings with thick brick walls and floors.

How do I get more heat from underfloor heating?

The heat output of an underfloor heating system can be significantly increased by installing high-quality UFH floor insulation alongside your system. Insulation improves a system's performance, improving heat-up times and ensuring the heat produced by the system will not escape the space.

Why is my underfloor heating not reaching set temperature?

If you underfloor heating system is not reaching temperature this may be due to downward heat loss. If your heating system has been installed on an un-insulated concrete slab or over an unheated space and insulation boards were not used, there will be a considerable amount of heat loss into the sub floor.

How long does it take for infloor heating to heat up?

With this system, it can take only a few minutes to begin heating up, reaching the desired temperature within all rooms in the house within about 15 minutes. For underfloor heating, it can take up to 4 hours or more to reach a comfortable room temperature and this is due to several different reasons.

Why is my heat taking so long?

The heating system may take longer to warm up due to issues like clogged air filters, thermostat problems, or inadequate maintenance. These factors can hinder proper airflow and heat distribution in the HVAC system, leading to delays in reaching the desired temperature.

Should I leave my underfloor heating on all day?

You can rest assured that leaving an underfloor heating system on all day long without causing any unwanted problems or damage to the system. In fact, when the weather is especially cold, it could even be a good idea to leave the system switched on.

What is the best temperature for underfloor heating?

Typically we would recommend setting your Underfloor heating manifold to between 35 and 45°C, which should give enough power to heat your rooms up to a maximum of 25 degrees while maintaining efficiency and cost-effectiveness.

Is underfloor heating expensive to run?

Although some people still expect underfloor heating to be expensive to run, the reality is that both the initial installation cost and the ongoing running expenses can represent great value for money. An often underestimated factor in calculating your running costs is how well insulated the floor base is.

Why does underfloor heating take so long?

Underfloor heating systems typically take longer to warm up due to the large surface area they need to heat and their installation beneath floor materials which act as insulators. The type of flooring, the system's design, and the initial room temperature can also affect the warm-up time.

What is the lifespan of underfloor heating?

No one wants to be pulling a floor up to replace something that they didn't install that long ago, after all! If you choose UFH for your property, you can expect it to last for around 50 years. Compare that to the average 12-year lifespan of a radiator, and you can see why it is so popular.

Why is my underfloor heating not hot?

If your electric underfloor heating isn't warm enough, you may need to adjust your thermostat settings or check the system's power output. This could also be down to the insulation in your home – check this before installation.

What is the downside of underfloor heating?

Yes, underfloor heating has a few disadvantages, such as higher installation costs, longer warm-up time compared to radiators, and potential restrictions on furniture placement.

Is it okay to turn off underfloor heating in summer?

Underfloor heating can be turned off in the summer months to preserve energy and maximise comfort. However, if you own a water-based underfloor heating solution, be sure to switch the underfloor heating on for 15-20 minutes every couple of weeks to identify any faults and prevent the system from sticking.

How long do heated floors take to heat up?

Electric systems heat floors quickly, typically in 30-60 minutes, due to direct energy transfer through heating elements beneath the flooring. Conversely, hydronic systems, powered by heated water, may take between 2-3 hours to warm up, depending on floor type, insulation, and ambient room temperature.

How to reset underfloor heating?

To reset the Underfloor Heating:
  1. Press and hold the Setup button for more than 15 seconds. After 15 seconds, the LED flashes red.
  2. When the LED stops flashing red, release the setup button. The LED stops flashing upon successful reset of the Underfloor Heating.

Should underfloor heating feel hot?

Tiles with underfloor heating underneath should indeed feel warm, but not hot. Underfloor heating is designed to provide a comfortable and consistent temperature across the floor's surface, creating a warm and inviting environment in your home.

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