Why Pets Are Hard on Your HVAC System

Pets constantly shed hair and release microscopic dander that gets pulled straight into your system. Over time, that buildup restricts airflow, makes your system work harder, and costs more to operate.

Tip 1: Change Your Filter Every 30 Days

The standard 90-day advice doesn't apply to pet owners. You need to change it every 30 days — sometimes sooner with multiple animals or heavy-shedding breeds.

Tip 2: Choose the Right Filter (MERV Rating)

• MERV 8: Baseline. Catches pet hair but lets dander through.
• MERV 11: Sweet spot for most pet households.
• MERV 13: Great for allergy sufferers or homes with multiple pets.

Our recommendation: MERV 11 pleated filter, changed monthly.

Tip 3: Pet Dander and Indoor Air Quality

Pet hair is visible. Pet dander is not — and dander is the bigger problem. Tips: run your fan on "ON" to circulate more air through the filter, vacuum frequently with HEPA vacuum, keep pets out of bedrooms.

Tip 4: Don't Skip the Annual Maintenance

In pet homes, we see coils caked in fur and dander — a dirty coil is one of the fastest ways to kill your system's efficiency.

Tip 5: Consider Duct Cleaning Every 3-5 Years

Signs it's time: visible dust from vents, musty odor, allergy symptoms that don't improve with filter changes.

Tip 6: Grooming Your Pets Helps More Than You'd Think

The less your pets shed inside, the less hair and dander end up in your system. Brush outside, bathe regularly, keep up with professional grooming.

FAQ

1. How often should I change my air filter if I have pets?
   1. Every 30 days. With multiple pets, check at 3 weeks.
2. What MERV rating is best for a home with cats and dogs?
   1. MERV 11 is the best balance. If allergies are a concern, MERV 13.
3. Will an air purifier help with pet allergies?
   1. Yes. A whole-home air purifier installed in your duct system is significantly more effective than a portable room unit.

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