To find the right size, check your current filter or measure the filter slot in your HVAC system. Air filters are typically labeled with their dimensions (length x width x depth). If you're unsure, you can always contact us for assistance in determining the correct size for your system.

The frequency of air filter changes depends on various factors such as filter type, air quality, and household conditions. Generally, we recommend:

• 1-2 inch filters: Every 1-3 months
• 3-4 inch filters: Every 6-9 months
• 5-6 inch filters: Every 9-12 months

However, if you have pets, allergies, or live in a high-pollution area, you may need to change your filter more frequently.

MERV stands for Minimum Efficiency Reporting Value. It's a rating system that indicates how effectively an air filter can trap particles of various sizes. The MERV scale ranges from 1 to 20, with higher numbers indicating better filtration. It's important because it helps you choose the right filter for your specific needs, balancing air quality with your HVAC system's requirements.

Yes, high-quality air filters can significantly help allergy sufferers. Filters with higher MERV ratings can capture smaller particles like pollen, pet dander, and dust mites, which are common allergens. For allergy relief, we typically recommend filters with a MERV rating of 11 or higher.

At Merv King, we're committed to environmental sustainability. Many of our filters are made with eco-friendly materials and are recyclable. We also offer reusable filters that can be washed and reused, reducing waste. Please check the product descriptions for specific environmental information on each filter type.

Yes, we offer a convenient subscription service where we deliver new filters to your door at regular intervals. You can customize the delivery frequency based on your needs, ensuring you never forget to change your filter on time.

Merv King filters are designed to provide superior air filtration while maintaining optimal airflow. We use high-quality materials and advanced filtration technology to ensure our filters meet or exceed industry standards. Our filters are rigorously tested for performance and durability, often outperforming comparable filters from other brands.