What's the best filter for a house with pets?

For a home with pets, you'll want a filter with a MERV rating between 11 and 13. This range captures pet dander, hair, and the fine particulate matter that comes with animals, without restricting airflow enough to strain your furnace or air handler.

Understanding MERV Ratings for Pet Owners

MERV (Minimum Efficiency Reporting Value) measures how effectively a filter captures particles. A MERV 11 filter is a solid choice for most pet households — it catches pet dander, dust mites, and fine dust while maintaining good airflow. A MERV 13 offers even better filtration and is worth considering if someone in your home has allergies or asthma triggered by pet allergens.

Avoid going above MERV 13 for a standard residential furnace. Filters rated MERV 14 and higher (like true HEPA filters) are designed for commercial systems and can actually restrict airflow in a typical home furnace, causing it to work harder, overheat, or short-cycle — leading to premature wear and higher energy bills.

What to Look For in Ottawa Homes

Ottawa's climate means your furnace runs hard from roughly October through April, so filter quality and change frequency matter a lot. With pets, plan to check your filter every 30–45 days rather than the standard 90 days. A clogged filter is one of the most common causes of furnace breakdowns we see — it's a simple thing that makes a big difference. Look for pleated filters (not the cheap fiberglass ones) in the MERV 11–13 range; brands like Filtrete, Nordic Pure, and Honeywell are widely available at Ottawa hardware stores.

A Quick Safety Note

A dirty, clogged filter doesn't just hurt efficiency — it can cause your heat exchanger to overheat and crack, which is a potential carbon monoxide risk. Staying on top of filter changes is genuinely one of the best things you can do for both air quality and furnace safety.

If you're unsure what filter size your system takes or whether your furnace can handle a higher MERV rating, we're happy to check during a routine maintenance visit. Ottawa HVAC Pro offers annual tune-ups starting around $150–$200 that include a filter inspection and system check — a worthwhile investment with pets in the home.