May 02, 2026
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A plumber settles the debate: Should we really keep the heating on all the time?

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With the constant fluctuations in energy prices and the variety of heating systems now available, the question of whether to leave the heating on at all times remains at the heart of many household discussions. This seemingly simple question actually touches on a combination of technical, economic, and environmental factors. To settle this often lively debate, it is essential to examine the practices implemented by a well-known heating professional for his expertise in the field, Paul Leclerc, an experienced plumber. Drawing on years of field experience, he provides solid insights on the tips to adopt for balancing thermal comfort, installation safety, and energy savings.

Reducing your bill: why not completely turn off the heating upon return?

Every winter, the temptation is great to completely turn off the heating when leaving home, thinking this will save on the energy bill. However, according to the technical analysis of a competent plumber, leaving the heating off all day can cause excessive cooling of the home. This is particularly problematic in case of negative temperatures, where the water pipes risk freezing, leading to sometimes costly plumbing damages.

Paul Leclerc recommends opting instead for maintaining a moderate temperature, around 15 to 17 °C when the house is unoccupied or during the night. This has several advantages:

  • Prevention of pipe freezing, which avoids often costly repairs.

  • Conservation of heat stored by the materials of the building, thus limiting heating efforts upon return.

  • Reduction of overall consumption by eliminating peaks in energy intensity associated with complete restarts.

This approach, though counterintuitive for some, is part of a practical and effective logic. Electric heating, for example, reacts quickly to variations but consumes more during sudden restarts. Central heating, on the other hand, benefits more from precise regulation that avoids overly long cycles of stopping and heating.

Situation

Recommended Temperature

Benefits

House unoccupied during the day

15 to 17 °C

Limits pipe freezing and retains wall heat

Bedroom at night

16 °C

Minimum comfort and energy savings

Presence in the house

18 to 20 °C

Optimal comfort and system efficiency

To delve deeper into these technical tips, several reliable resources can be consulted, offering more details on the subject, notably Ecopedia or the Observatory of Europe.

Avoiding pipe freezing: a winter priority for every homeowner

Frozen pipes pose a real threat to homes in regions subjected to low winter temperatures. The phenomenon can lead to ruptures, water leaks, and significant damage to walls and floors. As an experienced plumber, Paul Leclerc emphasizes the importance of never completely turning off the heating, especially during prolonged absences.

Maintaining a constant minimum temperature around 15–17 °C not only avoids freezing but also facilitates the functioning of the heating system. Paul presents several methods for good pipe protection:

  • Installation of insulation on exposed pipes in unheated areas such as basements and attics.

  • Programming the thermostat to maintain a constant temperature even during absence.

  • Regular checking of the heating system to ensure no breakdowns occur during crucial periods.

On this subject, an annual boiler maintenance is vital to prevent sudden breakdowns and ensure uniform heat distribution in the house. It also helps to meet the conditions of home insurance contracts and avoids costly damages.

Cause of freezing

Recommended remedy

Beneficial effects

Uninsulated pipes exposed to the cold

Insulation with foam

Significantly reduces the risk of freezing

Temperature too low during absence

Maintaining a thermostat at 15-17°C

Protects pipes and ensures lasting comfort

Neglected water heater

Mandatory annual service

Avoids unexpected breakdowns and leaks

To explore this theme further and discover more heating maintenance tips, the site How to Save is an excellent resource. Prevention remains the key to winter comfort without surprises.

Optimizing consumption: plumber tips for effective energy savings

A plumber plays a key role in home energy management, and Paul Leclerc shares practical advice to optimize heating use and reduce bills without sacrificing comfort. Continuous heating, when well-regulated, can actually contribute to better overall management of consumption.

To achieve this, several simple and effective measures should be considered:

  • Using a programmable thermostat to adjust the temperature according to time slots (presence or absence, day and night).

  • Promoting the use of a stable temperature rather than frequent stops/restarts, which are energy-intensive.

  • Regularly maintaining the boiler and radiators to ensure even distribution and avoid overconsumption.

  • Properly insulating the house: walls, windows, and attics to limit thermal losses.

The table below illustrates the impact of heating behavior on annual consumption:

Behavior

Estimated consumption

Advantages/Disadvantages

Heating left on permanently at low temperature

Average to low consumption

Reduces demand peaks and protects installations

Complete shutdown during absences

Spike in consumption upon return

Risk of freezing and high restart costs

Rapid and high temperature rise

Very high consumption

Discomfort and unnecessary expenses

For those wishing to learn more about innovations in electric heating and their optimal management, interesting articles are available on Prime Coup de Pouce Heating.

Heating debate: myths and realities about continuously running heating

The heating debate regarding the necessity of keeping the system active continuously is fueled by misconceptions that deserve clarification. Many believe that completely turning off the heating when leaving home maximizes savings. However, this logic is often challenged by solid knowledge from the plumbing profession and recent studies.

Here are some myths opposed to the observed reality:

  • Myth: Completely turning off the heating for a short period reduces the bill.

  • Reality: This practice causes intense heating cycles that consume more energy upon restarting.

  • Myth: Maintaining a constant temperature unnecessarily overheats the house.

  • Reality: A base temperature of around 15-17°C avoids significant energy losses related to complete cooling.

  • Myth: Electric heating is necessarily more expensive when running continuously.

  • Reality: Intelligent regulation makes it possible to control consumption even with an electric system.

This debate finds practical answers, notably on specialized sites like The Tribunal of the Net or Energy 2000, where experts debunk these ideas and recommend a balanced approach.

Heating maintenance: ensuring safety and performance over time

Beyond temperature issues, heating maintenance plays a crucial role in ensuring the efficiency and safety of the installation. Paul Leclerc reminds us that regular checks of the boiler, pipes, and valves are essential to prevent domestic accidents related to heating and to optimize energy consumption.

Among the essential interventions, we can mention:

  • Annual boiler service: checking for leaks, combustion adjustments to optimize performance, controlling tightness.

  • Control of safety devices, particularly carbon monoxide detectors to prevent poisoning.

  • Bleeding and purging of radiators to ensure correct circulation of the heat transfer fluid.

  • Leak and insulation diagnostics of circuits to limit thermal losses.

Regular maintenance also helps extend the lifespan of the equipment while ensuring consistency in thermal comfort. Paul therefore recommends not to neglect these actions and to call on a qualified professional if in doubt. To learn more about heating system maintenance, Deco Factory offers many practical tips.

Type of intervention

Recommended frequency

Objective

Boiler service

Annually

Ensure safety and performance

Safety check

Annually

Prevent poisoning and accidents

Radiator bleeding

As needed

Ensure smooth circulation

Insulation diagnostics

No fixed periodicity

Limit energy losses