À quelle fréquence les filtres d'un système de thermopompe centrale doivent-ils être changés?
Reading time: 4'

How Often Should the Filters in a Central Heat Pump System Be Changed?

How Often Should the Filters in a Central Heat Pump System Be Changed? – A Comprehensive Guide by AirGreen

Welcome to AirGreen, Montreal's premier HVAC company specializing in central heat pump systems. We understand that the idea of maintaining a heating, ventilation, and air conditioning (HVAC) system can feel daunting, especially when it comes to tasks like changing filters. To make things easier, we've put together this extensive guide to help you understand how often the filters in a central heat pump system should be changed, why it's important, and how it contributes to your system's efficiency.

Understanding the Role of Filters in Central Heat Pump Systems

Before we delve into the specifics of filter changes, it's crucial to understand the role filters play in your central heat pump system. Heat pump filters act as the first line of defense against dust, dirt, and other airborne particles. They help ensure that the air circulating throughout your home is clean and healthy, and they also protect the inner workings of the heat pump from becoming clogged with debris.

Determining the Frequency of Filter Changes

So, how often should the filters in a central heat pump system be changed? The simple answer is, it depends. There are several factors to consider:

  1. Type of Filter: Different heat pump systems use different types of filters. Some use disposable filters that must be replaced, while others use reusable filters that can be cleaned and reinserted.
  2. Usage: The more a system is used, the more often the filters will need to be changed. For example, a heat pump that is used year-round for both heating and cooling will likely require more frequent filter changes than one used only part of the year.
  3. Home Environment: If your home is particularly dusty, or if you have pets, you may need to change the filters more often.
  4. Air Quality: If anyone in the household suffers from allergies or respiratory conditions, it may be beneficial to change the filters more frequently to ensure the cleanest possible air.

As a general guideline, we at AirGreen recommend checking your filters monthly. If you can see dust and dirt buildup, it's time to clean or replace them. For disposable filters, a common change frequency is every 1-3 months. However, for more specific guidance based on your particular system and circumstances, don't hesitate to contact our team at AirGreen.

How to Change Filters in a Central Heat Pump System

Changing the filters in a central heat pump system is a relatively straightforward process. However, if you're unsure or uncomfortable, remember that AirGreen's skilled technicians are just a call away. For those willing to tackle this task, here are the basic steps:

  1. Locate the Filter: The filter is typically found in the air handler cabinet, which may be in your attic, basement, or a utility closet.
  2. Remove the Old Filter: The old filter should slide out easily. If it's a disposable filter, you can throw it away. If it's a reusable filter, you'll need to clean it.
  3. Insert the New/Cleaned Filter: Make sure you're inserting the new or cleaned filter in the right direction. There should be arrows on the filter frame indicating the proper airflow direction.
  4. Check the System: Once the new filter is in place, check your system to make sure everything is working correctly.

The Impact of Regular Filter Changes on Heat Pump Efficiency

The importance of regular filter changes cannot be overstated. It has a direct impact on the efficiency of your central heat pump system, affecting factors like:

  1. Airflow: A clogged filter can restrict airflow, forcing the heat pump to work harder and thereby reducing its efficiency.
  2. Energy Consumption: With improved airflow from clean filters, the heat pump doesn't have to expend as much energy to heat or cool your home, leading to lower energy bills.
  3. System Lifespan: Regular filter changes can extend the lifespan of your central heat pump system by preventing dust and dirt from accumulating in the inner components of the system.
  4. Air Quality: Regular filter changes also mean cleaner air in your home, which is especially beneficial for those with allergies or respiratory conditions.


In conclusion, the frequency of filter changes in a central heat pump system largely depends on the type of filter, usage, home environment, and air quality needs. As a rule of thumb, check your filters monthly and clean or replace them as needed. For personalized advice, reach out to AirGreen, your trusted partner in all things HVAC.