Is It Normal for My Central Heat Pump to Run 20 Hours a Day?

Understanding Why a Central Heat Pump Runs So Long: Myth or Reality?

At AirGreen, we often hear this question from homeowners in Montreal, Laval, Longueuil, the North Shore and the South Shore: “Is it normal for my central heat pump to run almost all day?” The answer may surprise you, but yes — in many cases, it’s completely normal. In this article, we’ll explain why some central heat pumps can run for up to 20 hours a day — both in winter and summer — and why this doesn’t necessarily mean there’s a technical problem or a faulty installation.

Continuous Operation of a Heat Pump: A Logic of Energy Efficiency

Unlike older forced-air heating systems or traditional electric furnaces that operate in short, powerful cycles, modern central heat pumps are designed to run for longer periods, but in a stable and energy-efficient manner. This strategy allows for:

• Maintaining a consistent and comfortable indoor temperature

• Reducing power consumption peaks

• Optimizing long-term energy efficiency

The Importance of Inverter Technology

Most new-generation central heat pumps — such as the models we install at AirGreen, including the Bosch BOVA, Lennox EL18XPV, or high-efficiency Fujitsu systems — are equipped with Inverter technology. This allows the compressor to run at variable speeds, meaning:

• The heat pump doesn’t shut off completely after reaching the desired temperature.

• It simply slows down, maintaining the set temperature without major fluctuations.

• This results in better efficiency, and improved thermal and sound comfort.

In this context, running 15 to 20 hours a day is common, especially during extremely cold or hot days.

The Impact of Outdoor Conditions in Montreal and Surrounding Areas

Quebec winters are no joke: temperatures below -20°C can last for several days. In these conditions:

• The central heat pump needs to work continuously to maintain adequate warmth.

• If your heat pump is properly sized and well-installed, it will be able to run for extended periods without overconsumption.

• Likewise, during heatwaves, the air conditioning mode of the central heat pump may operate most of the day, especially in south-facing homes or those with poor insulation.

What’s Not Normal: Warning Signs

While extended operation can be normal, certain signs should raise red flags:

• Unusual noise or excessive vibration

• Sudden spike in electricity bills

• Temperature differences between rooms

• A system that never stops, even in mild conditions

In these cases, a professional HVAC maintenance check is recommended. At AirGreen, we provide this service in all areas from Laval to Longueuil, including Repentigny and Brossard.

The Role of Proper Heat Pump Sizing

Another crucial factor is the sizing of your system. A heat pump that is too small or too large for your home will lead to:

• Overworking of the unit

• Premature compressor wear

• Excessive energy consumption

Our experts always make sure to calculate your home’s heating and cooling load precisely, taking into account:

• The total living area

• The home’s orientation

• The level of insulation

• The type of windows and airtightness

Case Study: Bosch BOVA 5-Ton Heat Pump Installed in Saint-Bruno

Last January, we installed a Bosch BOVA 5-Ton R-410A central heat pump in a residential property in Saint-Bruno-de-Montarville, on Montreal’s South Shore. The client called us back a few weeks later, mentioning the system was running almost continuously.

After inspection:

• The system was functioning normally

• It was maintaining a stable indoor temperature of 21.5°C

• The monthly energy consumption was actually lower than with her old furnace

This case perfectly illustrates that operating time alone is not a reliable indicator of system performance.

Practical Tips for Homeowners

Here are a few tips if you notice your central heat pump running for long stretches:

1. Check your air filters monthly and clean or replace them as needed.

2. Make sure return air grilles aren’t blocked.

3. Schedule yearly preventative maintenance with a certified technician.

4. Review your electricity bills: a steady increase could signal a problem.

A Properly Installed Central Heat Pump Is a Long-Lasting System

At AirGreen, our goal is to provide durable, high-performance HVAC installations tailored to Quebec’s climate. We understand that a central heat pump is a major investment, which is why we ensure:

• A custom thermal assessment

• Transparent advice on model selection and available grants (like Hydro-Québec’s LogisVert program)

• A clean, professional installation, fully compliant with the highest industry standards

In Conclusion: 20 Hours of Operation? It Might Actually Be a Good Thing

So the next time you hear your central heat pump running for hours on end, don’t jump to conclusions. An efficient system is often one that runs for a long time — but smartly.

If you have questions, need a performance check, or want to schedule a central HVAC installation on the North Shore, South Shore, or Greater Montreal Area, our team is here to help.