Cleaner Air Starts at Home

PUREFLOW® Home Furnace Air Filters feature advanced multi-stage filtration to help trap dust, pollen, and household odors. Designed for dependable performance, they support healthier indoor air.

A Filtration Solution for Every Home

PUREFLOW® Home Air Filters are designed with tiered, multi-stage filtration to meet the needs of every household — from everyday air maintenance to maximum protection and odor control.

Everyday protection for routine air quality needs
Enhanced filtration for allergy season and pet-friendly homes
High-efficiency purification with odor and pollutant control

Everyday protection for routine air quality needs
Enhanced filtration for allergy season and pet-friendly homes
High-efficiency purification with odor and pollutant control

Cleaner Air, On Your Terms

Every home is different. That's why we offer filtration levels designed for everyday living, allergy season, and high-performance air protection.

CORE

MERV 8 Filtration

Particulate filtration captures common household particles like dust, pollen, and pet dander for dependable daily protection.

Supports HVAC Efficiency

Designed to maintain balanced airflow for consistent system performance.

Everyday Air Defense

Ideal for small spaces, light allergies, and routine dust & pollen control.

ADVANCED

MERV 11 Enhanced Filtration

Particulate filtration captures smaller airborne particles, including smoke, allergens, and fine dust.

Everyday Allergy Defense

Ideal for allergy season and pet-friendly homes.

Balanced Airflow Design

Enhances filtration without restricting HVAC performance

ULTRA +

MERV 13 Efficient Filtration

Captures microscopic airborne particles, including smoke and fine allergens, ensuring cleaner air.

Activated Charcoal Odor Control

Neutralizes pet, cooking, and household odors.

Advanced Indoor Air Protection

Helps reduce gaseous pollutants — ideal for sensitive households and urban living.

CORE	ADVANCED	ULTRA +
MERV 8 Filtration Particulate filtration captures common household particles like dust, pollen, and pet dander for dependable daily protection.	MERV 11 Enhanced Filtration Particulate filtration captures smaller airborne particles, including smoke, allergens, and fine dust.	MERV 13 Efficient Filtration Captures microscopic airborne particles, including smoke and fine allergens, ensuring cleaner air.
Supports HVAC Efficiency Designed to maintain balanced airflow for consistent system performance.	Everyday Allergy Defense Ideal for allergy season and pet-friendly homes.	Activated Charcoal Odor Control Neutralizes pet, cooking, and household odors.
Everyday Air Defense Ideal for small spaces, light allergies, and routine dust & pollen control.	Balanced Airflow Design Enhances filtration without restricting HVAC performance	Advanced Indoor Air Protection Helps reduce gaseous pollutants — ideal for sensitive households and urban living.

Home Filters - Frequently Asked Questions

What are the benefits of using a furnace air filter?

Furnace air filters help improve indoor air quality by capturing dust, allergens, and airborne particles before they circulate through your home. They also protect components from buildup, support consistent airflow, and help the system operate efficiently.
How do I choose the right MERV rating for my home furnace air filter?

Choosing the right MERV rating depends on your indoor air quality needs and HVAC system design. Most residential systems perform best with filters in the MERV 8–13 range, which balance filtration efficiency and airflow. Understanding MERV air filter ratings helps you pick the right level of protection for your household.
How often should I change my furnace air filter?

Most furnace air filters should be replaced every 1- 3 months. Homes with pets, allergy concerns, or heavy system use may benefit from more frequent replacement.
Do I need to change my furnace filter if it doesn’t look dirty?

Yes. Filters can become clogged with fine particles that are not always visible. Replacing the filter on a regular schedule helps maintain airflow and system efficiency.
What size furnace air filter do I need for my HVAC system?

Your furnace air filter must match the exact size specified for your system. Using the correct dimensions ensures proper fit, prevents air bypass, and supports effective filtration. Finding the best home HVAC air filter starts with getting the size right.
Where is my furnace air filter typically located?

Furnace air filters are commonly found inside the furnace cabinet, near the return air duct, or behind a return air grille in a wall or ceiling.
What happens if a furnace air filter is installed backwards?

Installing a filter backwards can reduce filtration effectiveness and restrict airflow. Always install the filter with the airflow arrow pointing toward the furnace.
What is a MERV rating for air filters?

MERV stands for Minimum Efficiency Reporting Value. It measures how effectively a filter captures airborne particles- the higher the rating, the smaller the particles it can trap.
For most homes, filters in the MERV 8 - 13 range offer the right balance of filtration and airflow.
What MERV rating do I need?
It depends on your household needs:
- For routine dust and pollen control, our Core (MERV 8) is a solid everyday choice
- For allergy season or pet owners, our Advanced (MERV 11) offers enhanced protection
- For maximum protection in sensitive households or urban areas, go with our Ultra+ (MERV 13)
What is the best furnace filter for allergy sufferers?
For allergy relief, a MERV 11 or MERV 13-rated furnace filter is recommended. These capture fine allergens, pollen, pet dander, and smoke that lower-rated filters may miss.
PUREFLOW offers two options for allergy sufferers:
- Advanced Filter (MERV 11) - Enhanced everyday protection against allergens and fine particles
- Ultra+ Filter (MERV 13) - Maximum protection with activated charcoal for odor and pollutant control
What is the best air filter for pet owners?

For pet owners, a MERV 11 filter or higher works best. It captures pet dander, fine hair particles, and airborne allergens more effectively than standard filters.