Atomic
FLRQB5AH23M11 Filter 22.7x20.7x4.7 - Pre-Assembled Trane Compatible MERV 11 (2-Pack)
FLRQB5AH23M11 Filter 22.7x20.7x4.7 - Pre-Assembled Trane Compatible MERV 11 (2-Pack)
Couldn't load pickup availability
🚨 IMPORTANT: Verify Your Model Number Before Ordering!
This filter is ONLY for: FLRQB5AH23M11 (22.7 x 20.7 x 4.7)
⚠️ WARNING: Many Envirowise filters have similar numbers but different sizes:
- AH, DN, and FR are different model families with different sizes
- FLRQB5AH21M11 ≠ FLRQB5FR21M11 (completely different dimensions)
Always check your current filter's label and compare the exact size measurements!
Why Choose Atomic Compatible FLRQB5AH23M11?
- ✅ Perfect Fit Guaranteed - Exact replacement for Trane FLRQB5AH23M11
- ✅ Ships Pre-Assembled - No messy assembly required (unlike competitors)
- ✅ MERV 11 Hospital-Grade Filtration - Removes dust, pollen, pet dander, mold spores, and bacteria
- ✅ 2-Pack Value - 6 to 10 month supply included
- ✅ North Carolina Made - Ships within 24 hours on business days
Complete Trane QuikBox Model Reference
Make sure you have the right model! Here are all available Trane QuikBox sizes:
Model Number | Filter Size | Available |
---|---|---|
FLRQB5AH18M11 | 17.7 x 20 x 4.7 | Shop Now |
FLRQB5AH21M11 | 20.7 x 20 x 4.7 | Shop Now |
FLRQB5AH23M11 | 22.7 x 20.7 x 4.7 | 👈 YOU ARE HERE |
FLRQB5AH26M11 | 25.2 x 20 x 4.7 | Shop Now |
FLRQB5DN17M11 | 16.7 x 20 x 4.7 | Shop Now |
FLRQB5FR16M11 | 15.7 x 19 x 4.7 | Shop Now |
FLRQB5FR17M11 | 16.7 x 26 x 4.7 | Shop Now |
FLRQB5FR21M11 | 20.2 x 26 x 4.7 | Shop Now |
FLRQB5FR24M11 | 23.7 x 26 x 4.7 | Shop Now |
Perfect Fit For These Systems:
- Trane FLRQB5AH23M11 QuikBox Cabinets
- Envirowise EQBFM235A0AH11 Systems
- American Standard TFM235B0AH0
- Trane Perfect Fit TFM235B0AH0 Cabinets
🔍 Size Clarification (Important!)
Actual Filter Size: 22.7" x 20.7" x 4.7" (this is correct)
Note: Some boxes may print 22.7x20x4.7, but the filter itself is correctly sized at 22.7x20.7x4.7
What Amazon Customers Say:
"Perfect fit, well-made, and easy to install. Great value for money!"
"The quality of the filter media and the fact that they come fully expanded and ready to install make Atomic my choice from now on!"
"Fit perfectly! Deliver quickly at a fair price. Will buy again!!"
Technical Specifications:
Actual Size: | 22.7" x 20.7" x 4.7" |
MERV Rating: | 11 (Hospital-Grade Filtration) |
Frame Material: | Durable Chipboard |
Filter Media: | High-Efficiency Synthetic Fiber |
Average Life: | 6 to 10 Months (under normal operating conditions) |
Quantity: | 2 Filters per Pack |
Easy Installation - No Assembly Required!
Unlike flat-pack competitors, our filters arrive fully assembled and ready to install. Simply remove your old filter and slide in the new one - no cutting, folding, or assembly mess.
What Does MERV 11 Remove?
- 🌿 Pollen & Allergens - Excellent removal of seasonal allergens
- 🐕 Pet Dander - Great for homes with furry friends
- 🏠 Dust & Dust Mites - Keeps surfaces cleaner longer
- 🍄 Mold Spores - Protects against airborne mold particles
- 🦠 Bacteria - Filters many common airborne bacteria
- 💨 Smoke & Smog - Reduces larger smoke particles and automotive exhaust
Frequently Asked Questions:
Q: How do I know if this is the right filter for my system?
A: Check your current filter label for model number FLRQB5AH23M11 and measure 22.7" x 20.7" x 4.7". If you have a different model number (like FLRQB5AH21M11 or FLRQB5FR21M11), you need a different size - see our model reference table above.
Q: Will this fit my Trane FLRQB5AH23M11 system?
A: Yes! Our compatible filter is designed as an exact replacement for the Trane FLRQB5AH23M11. We guarantee proper fit.
Q: What's the difference between compatible and OEM?
A: Our compatible filters meet or exceed OEM specifications at a fraction of the cost, plus they ship pre-assembled for easier installation.
Q: How often should I replace this filter?
A: Every 6-10 months under normal operating conditions for optimal air quality and system efficiency. With 2 filters included, you're covered for up to 20 months.
Q: Why choose Atomic over Amazon or big box stores?
A: Direct-from-manufacturer pricing, expert filter knowledge, North Carolina-based customer service, and 24-hour shipping on business days.
Why Trust Atomic Filters?
- 🏆 Experience Checked™ - We verify every filter specification
- 📦 Fast Shipping - Ships within 24 hours from North Carolina
- ⭐ Top Rated - 80+ five-star Amazon reviews
- 🎯 Perfect Fit Guarantee - Right filter, right size, every time
Atomic vs. Competitors:
Feature | Atomic Compatible | Typical Competitors |
---|---|---|
Ships Pre-Assembled | ✅ Yes | ❌ Flat-pack assembly required |
Amazon Reviews | ✅ 80+ Five Stars | ❓ Limited reviews |
North Carolina Made | ✅ Yes | ❌ Overseas manufacturing |
24-Hour Shipping | ✅ Business days | ❌ 3-5 day processing |
Filter Lifespan | ✅ 6-10 months each | ❌ 60-90 days typical |
Model Verification | ✅ Expert sizing help | ❌ No compatibility guidance |
Ready for Cleaner Air?
Order now and get premium air filtration delivered to your door!
Share







I replaced my upstairs and downstairs HVAC units about 9 months ago and just remembered that there was a central filter that needed to be replaced every 6 months. I went downstairs to the unit and found it was a massive 4" thick box filter. I looked them up and quickly learned that they can run $90+ per filter! I happened to see Atomic had a filter in the search results that was pretty much 2 for the price of 1, so I checked out their website. I noticed a North Carolina area code on their phone number at the top of the screen, so I decided to call and see if they were legit. I didn't get an answer, so I went about my day. Next thing I know my phone rings and the guy says "this is David at Atomic Filters, sorry we just missed your call" and I was kinda shocked! I asked where they were located and he tells me they're a few hours away from me in NC! I told him cool, in that case I'm about to place an order and he tells me alright, it'll ship out in the morning! 2 days later I had a year's worth of filters for half the price of other options and they came from right down the road! I'll definitely order again next year.
Loved that the filters came already assembled! It was very easy to install. This is the third year that I have bought the filters from Atomic Filters and they have been quickly delivered and always in great shape. I will be buying them again soon. Recommend them.
Filters arrived earlier than expected fully assembled. Great quality product. Would highly recommend.
Good price. Came already assembled and arrived fast.
I ordered Trane quick box filters. I was pleasantly surprised when they came and was already assembled. I’ve ordered from different companies prior and had to assemble them and get all cut up in the process. Definitely will order again. Prices are fantastic.
Most Popular Air Filters
In Stock - Ships in 24hr business days
Genuine Carrier PGAPXCAR1625 Air Filter 16x25x3 MERV 13
180+ Reviews | OEM Replacement for PGAPAXX1625
Buy NowCarrier PGAPXCAR2025 OEM Air Filter 20x25x3 MERV 13
Replacement Cartridge for Performance Series Air Purifier PGAPAXX2025
Buy NowGenuine Carrier AGAPXCAR1625 Air Filter 16x25x3 MERV 13
180+ Reviews | OEM Replacement for PGAPAXX1625
Buy NowTrane BAYFTFREXM2 (2-Pack) - 25 x 5 inch Perfect Fit
Expandable Replacement Air Filter Media
Buy Now