How do I improve airflow from my vents?

Poor airflow from your vents is usually caused by dirty filters, blocked vents, or ductwork issues - most of which you can check yourself before calling a professional.

Start with the simplest solution: check your furnace filter. A clogged filter is the most common cause of reduced airflow throughout your home. If it's dirty or hasn't been changed in 2-3 months, replace it with a new one. Make sure you're using the right size and don't go higher than MERV 11 unless your system is designed for it - higher-rated filters can actually restrict airflow in older systems.

Next, inspect all your vents and returns. Walk through your home and make sure furniture, curtains, or other items aren't blocking supply vents or return air grilles. Even partially blocked vents can significantly reduce airflow to that room. Remove any dust buildup on the vent covers themselves - a vacuum with a brush attachment works well for this.

Check your ductwork in accessible areas like the basement or crawl space. Look for disconnected ducts, large gaps, or crushed flexible ducts. These are common in Ottawa homes, especially older ones or those with recent renovations. You can temporarily seal small gaps with metal tape (not regular duct tape), but major ductwork repairs should be handled by professionals.

In Ottawa's climate, ductwork problems are particularly common due to our extreme temperature swings causing expansion and contraction. Many homes also have undersized return air ducts, which creates negative pressure and reduces overall system efficiency. If you've checked the basics and still have poor airflow, the issue likely requires professional ductwork evaluation or system balancing.

Call a licensed HVAC technician if you notice airflow problems in multiple rooms, hear unusual noises from the ducts, or if basic maintenance doesn't improve the situation. Poor airflow can strain your system and lead to premature equipment failure, especially during Ottawa's harsh winters when your furnace works hardest.

For comprehensive ductwork inspection and professional duct cleaning services, Ottawa HVAC Pro can evaluate your entire system and recommend the most cost-effective solutions for your home.