If you’re in the market for a new air cleaner for your home, two great options to consider are the Lennox X6672 and X6675 models. Both offer high-quality air filtration to remove allergens, odors, and other pollutants from the air.
But what are the key differences between these two air cleaners? And which one is better suited for your needs?
In this comprehensive guide, we’ll compare the Lennox X6672 and X6675 air cleaners side-by-side. We’ll look at their features, specifications, pros and cons, and ideal usage scenarios.
Read on to find out which Lennox air cleaner is the best choice for your home!
A Brief Comparison Table
| Feature | Lennox X6672 | Lennox X6675 |
| Filtration Stages | 2 stages: MERV 8 pre-filter, MERV 16 main filter | 4 stages: Pre-filter, MERV 15 filter, HEPA filter, Activated carbon filter |
| Airflow Capacity | 300 CFM | 800 CFM |
| Coverage | Up to 1,500 sq ft | Up to 2,000+ sq ft |
| Noise Level | 51-68 dBA | 53-69 dBA |
| Dimensions | 21″ x 21″ x 24″ | 24″ x 27″ x 28″ |
| Weight | 43 lbs | 92 lbs |
| Smart Home Compatibility | None | Wifi, app control, voice assistant integration |
| Estimated Filter Life | 6-12 months | 1-3 years |
| Cost | $549 MSRP | $899 MSRP |
Overview of the Lennox X6672 Air Cleaner
The Lennox X6672 is a mid-range air cleaner option that uses a two-stage air filtration system. Key features and specs include:
- Two-stage air filtration with a MERV 8 pre-filter and MERV 16 main filter
- 300 CFM airflow capacity
- 24V voltage
- Dimensions of 21” x 21” x 24”
- Weight of 43 lbs
- Composite housing construction
- Estimated filter life of 6-12 months
This Lennox air cleaner is compact in size but powerful enough for homes up to 1,500 square feet.
The two-stage filtration captures large particles like dust and pet dander in the pre-filter, while the pleated MERV 16 filter traps smaller allergens and pollutants.
Some homeowners choose the X6672 for its balance of performance and value. While not the most advanced model from Lennox, it still removes up to 95% of particles between 0.3 to 10 microns. The estimated 1-year filter lifespan also minimizes maintenance requirements.
Overview of the Lennox X6675 Air Cleaner
The Lennox X6675 is a premium air cleaner that utilizes a four-stage filtration system. Key features and specs of this model include:
- Four-stage air filtration with pre-filter, MERV 15 filter, hospital-grade HEPA filter, and activated carbon filter
- 800 CFM airflow capacity
- 24V voltage
- Dimensions of 24” x 27” x 28”
- Weight of 92 lbs
- Composite housing construction
- Estimated filter life of 1-3 years
With double the airflow capacity and a more robust four-stage filtration system, the X6675 is built to handle large homes up to 2,000 square feet. The pre-filter catches large particles, while the MERV 15 and HEPA filters remove allergens, smoke, bacteria, and mold spores. Finally, the activated carbon filter absorbs household odors and VOCs.
Homeowners who want hospital-level filtration and have pets, smokers, or dust concerns often choose the X6675. But the higher performance comes at a cost – this flagship model is pricier upfront and has more expensive replacement filters.
Filtration Capabilities Comparison
One of the biggest differences between the Lennox X6672 and X6675 is the filtration capabilities:
- X6672 Filtration Stages: MERV 8 pre-filter, MERV 16 main filter
- X6675 Filtration Stages: Pre-filter, MERV 15 filter, HEPA filter, activated carbon filter
While both air cleaners use a pre-filter to catch larger particles, the X6675 takes air filtration a step further.
The hospital-grade HEPA filter can remove over 99% of particles 0.3 microns and larger.
This includes allergens, bacteria, smoke, mold, and pet dander.
The X6675’s activated carbon filter also absorbs gases, fumes, and odors that other filters can’t trap.
This creates fresher, cleaner-smelling air.
For most homeowners, the X6672’s two-stage MERV 16 filtration will be sufficient. But people with allergies or chemical sensitivities may benefit from the X6675’s higher filtration capabilities.
Airflow Capacity
Another significant difference between these Lennox models is the airflow capacity:
- X6672 Airflow: 300 CFM
- X6675 Airflow: 800 CFM
The X6675 has over 2.5x more airflow than the X6672. This extra power makes it better equipped to handle large spaces up to 2,000 square feet. The X6672 is best suited for medium rooms around 1,500 square feet.
So if you have a large open floor plan or two-story great room, the X6675 can recirculate all the air effectively. But for traditional one-story homes, the X6672 will usually move enough air to keep your family breathing easy.
Noise Levels
High-powered air cleaners often trade noise for airflow. But both of these Lennox models offer quiet operation:
- X6672 Noise Level: 51 dBA on low speed; 68 dBA on high speed
- X6675 Noise Level: 53 dBA on low speed; 69 dBA on high speed
These decibel ratings are similar to a quiet conversation. While you’ll notice some white noise in the background, it shouldn’t disturb sleep or concentration. Many homeowners appreciate how quietly these air cleaners run, especially in bedrooms.
Some user reviews indicate the X6675 may have a slight hum at the highest fan setting. But overall, noise levels are comparable between the two models. Neither will drone loud enough to become a nuisance.
Cost Comparison
As you might expect, the flagship X6675 costs significantly more than the mid-range X6672:
- X6672 Cost: $549 MSRP
- X6675 Cost: $899 MSRP
The X6675’s premium construction, high-end filtration, increased airflow, and WiFi smart capabilities account for the higher price point. It’s built to be the ultimate air filtration powerhouse.
On the other hand, the X6672 offers reliable performance at a more budget-friendly cost. For many homeowners, it hits the sweet spot for advanced filtration without the premium price.
Replacement filters will be another ongoing cost to factor in. The X6675’s specialized filters cost 2-3x more than the X6672’s standard pleated filters. Installation and any repairs outside of warranty coverage are extra costs as well.
Dimensions
The physical size of an air cleaner is an important consideration if space is limited. Here are the dimensions of each model:
- X6672 Dimensions: 21” x 21” x 24”
- X6675 Dimensions: 24” x 27” x 28”
The X6675 is a few inches wider, deeper, and taller since it houses extra filtration components. Make sure to measure your intended installation location to ensure sufficient clearance.
The X6672 has a smaller footprint that makes it easy to tuck away out of sight. Both models include directional air louvers that help direct the purified airflow. Proper placement is key so air can properly circulate without obstructions.
Smart Home Compatibility
Lennox designed the X6675 as their first smart air cleaner option. It includes built-in WiFi and can integrate with popular smart home platforms:
- X6672 Smart Features: None
- X6675 Smart Features: WiFi connectivity, app control, Amazon Alexa and Google Assistant voice control
With the X6675, you can use the Lennox app or voice commands to monitor air quality, change fan speeds, and receive filter change reminders. It also works with IFTTT for custom automation capabilities.
The X6672 lacks any smart features. Without WiFi or app connectivity, you have basic mechanical control through manual fan speed switches. If smart home integration is important, the X6675 is the clear choice.
Ideal Usage Scenarios
Now that we’ve compared these two Lennox models in depth, in what situations is each air cleaner the better option?
The X6672 is ideal for:
- Homes up to 1,500 square feet
- Families with general air quality concerns
- Bedrooms, nurseries, home offices
- Budget-conscious shoppers
The X6675 is ideal for:
- Large homes up to 2,000+ square feet
- Families with allergies or chemical sensitivities
- Open floor plans and two-story rooms
- Smart home enthusiasts
- Locations with pets, tobacco smoke, wildfire pollution
The X6675 is overbuilt for small households that only need basic air purification. Its hospital-grade filtration and high cost may be overkill. The X6672 hits the sweet spot for most homeowners.
But for those needing robust filtration in a large space or with specialized concerns like allergies, the X6675 is worth the investment. Its ultra-fine particle removal and odor elimination create the cleanest, healthiest indoor air possible.
Frequently Asked Questions (FAQ)
The lifespan of a Lennox X6675 will depend on frequency of use and how well it’s maintained. The housing and internal components are built to last 5-10 years or more. Replacing filters per the manufacturer’s recommendations will maximize the operating life. Limited warranties run 10 years on parts and 5 years on labor.
The Lennox X6675 air cleaner has dimensions of 24” wide x 27” deep x 28” tall. It has a larger, more square footprint than the smaller X6672 model. Be sure to measure installation clearance to ensure it will fit your space. Proper airflow requires at least a few inches of clearance on all sides.
Conclusion
After comparing the Lennox X6672 and X6675 air cleaners, the better option comes down to your house size, filtration needs, and budget.
The X6672 gives you solid two-stage filtration at an affordable price point. It’s great for medium rooms around 1,500 square feet.
For large spaces and specialized air quality concerns, upgrade to the X6675. With medical-grade HEPA filtration plus odor absorption, it tackles every indoor air challenge imaginable.
Hopefully this breakdown makes it easier to decide which Lennox model is the right fit. Breathing clean, allergen-free air at home is priceless for your family’s health and comfort. With proper maintenance, either of these air cleaners will reliably purify indoor air for years to come.