Yes, the Electro-Air 16x25x5 air filters fit most Day and Night HVAC systems—but the fit depends on your specific air handler configuration.
Our crews discover this firsthand during attic insulation installations across Pembroke Pines. When we're up in attics assessing insulation coverage, we're working directly alongside Day and Night air handlers—and we see the filter cabinets up close. What we've noticed is that homeowners often assume all 16x25x5 filters are interchangeable. They're not.
During a recent insulation job in a Pembroke Pines home, our technician spotted a buckled Electro-Air filter crammed into a Day and Night cabinet that required slightly different rail spacing. The homeowner had no idea the improper fit was letting unfiltered air bypass the media entirely—while their energy bills climbed from the strain on the system.
This guide shares the compatibility details we document in the field:
Day and Night model numbers we've confirmed accept Electro-Air 16x25x5 filters
Cabinet rail and slot dimensions to measure before ordering
Cross-reference part numbers for OEM and quality aftermarket replacements
Signs of improper fit we spot during attic inspections
South Florida attics push HVAC systems hard. A filter that doesn't seat correctly accelerates wear on your equipment. Use this guide to verify the right fit before you order—and avoid the airflow restrictions and efficiency losses we routinely uncover during insulation work.
Quick Answers
Electro-Air 16x25x5 Air Filters
What it is: A 5-inch deep pleated HVAC filter rated MERV 11 for residential air handlers.
Actual dimensions: 15-3/8" x 24-3/8" x 4-3/8"
Compatible systems: Day and Night, Carrier, Bryant air handlers with matching cabinet specs.
Replacement frequency: Every 6–12 months. In South Florida homes running AC year-round, we recommend 6-month cycles.
Cross-reference part numbers:
Electro-Air: MF0-E02
Carrier: FILCCCAR0016
Bryant: FILBBCAR0016
Honeywell: FC100A1029
What we've learned in the field: Filter fit matters more than filter rating. We've pulled brand-new Electro-Air 16x25x5 filters from Day and Night cabinets that were causing airflow problems—not because they were dirty, but because they never sealed correctly. Measure your cabinet interior before ordering: 15-3/8" width, 24-3/8" height, 4-3/8" depth minimum.
Bottom line: The Electro-Air 16x25x5 works well in compatible systems when properly seated. Two minutes with a tape measure prevents fit problems that no amount of filter changes can fix.
Top Takeaways
Five key points from our field experience with Electro-Air 16x25x5 filters in Day and Night systems.
1. Yes, it fits—but verify first.
Compatible with most Day and Night models (FEM4X, FE4A, FB4C, FX4D)
Cabinet configurations vary across model lines
Two-minute measurement confirms your system works
Actual filter dimensions: 15-3/8" x 24-3/8" x 4-3/8"
2. Filter fit matters more than filter freshness.
A sealed MERV 8 outperforms a MERV 13 with bypass gaps
We've pulled brand-new filters causing problems due to poor fit
Replacement schedules only work when the filter actually seals
3. South Florida conditions leave no margin for error.
AC runs year-round
Attic temperatures exceed 140°F
Humidity stresses equipment constantly
Bypass air sends moisture directly to evaporator coils
Proper fit isn't optional here—it's essential
4. Measure the cabinet, not the old filter.
Check interior dimensions where the filter seats:
Measuring the old filter or door opening leads to ordering errors.
5. Federal research confirms what we observe in attics.
Indoor air: 2–5x more polluted than outdoor air
Energy impact: 5–15% increase from improper filtration
HVAC share: 52% of household energy consumption
Proper fit protects air quality, equipment, and utility bills
Bottom Line
The Electro-Air 16x25x5 works well in Day and Night systems—when it fits correctly.
Measure before ordering
Verify cabinet clearances
Treat filter fit as seriously as filter quality
Day and Night HVAC systems share manufacturing lineage with Carrier and Bryant units. This means filter cabinet designs often overlap—but not always.
We've opened filter compartments on Day and Night air handlers during attic insulation projects and found three distinct cabinet styles:
Side-load cabinets with horizontal filter rails
Bottom-load cabinets requiring vertical insertion
External filter racks mounted adjacent to the air handler
Each style accepts 16x25x5 media filters differently. The Electro-Air 16x25x5 seats properly in most configurations, but rail spacing and depth clearance vary by model year and unit size.
Electro-Air 16x25x5 Specifications
The Electro-Air 16x25x5 filter measures:
Actual dimensions: 15-3/8" x 24-3/8" x 4-3/8"
Nominal dimensions: 16" x 25" x 5"
MERV rating: 11 (standard media)
Media type: Extended surface, pleated synthetic
This filter replaces the Electro-Air GENUINE part number?"MF0-E02 and fits cabinets designed for five-inch-deep media. In our experience, the actual depth measurement matters most—Day and Night cabinets built for four-inch filters won't accommodate this media without modification.
Day and Night Models Compatible with Electro-Air 16x25x5
Based on filter cabinet inspections during our South Florida service work, these Day and Night air handler series accept Electro-Air 16x25x5 filters:
Important: Model variations exist within each series. We always recommend measuring your cabinet interior before ordering.
How to Verify Fit Before Ordering
Our technicians follow this quick measurement process when assessing filter cabinets during attic work:
Turn off HVAC system at the thermostat
Remove existing filter and note the labeled size
Measure cabinet interior width (should accommodate 15-3/8" minimum)
Measure cabinet interior height (should accommodate 24-3/8" minimum)
Measure cabinet depth (must allow 4-3/8" for proper media seating)
Inspect rail spacing—filter edges should slide into tracks without forcing
If your measurements fall within spec, the Electro-Air 16x25x5 should seat flush with no air gaps around the frame.
Cross-Reference Part Numbers
When ordering Electro-Air 16x25x5 replacements for Day and Night systems, these part numbers cross-reference:
Electro-Air: MF0-E02
Carrier: FILCCCAR0016
Bryant: FILBBCAR0016
Honeywell: FC100A1029 (equivalent dimensions)
GeneralAire: 4541 (compatible media size)
We recommend verifying part numbers match your cabinet specifications. Aftermarket filters sometimes measure slightly smaller, leaving bypass gaps we've detected during insulation inspections using airflow testing.
Common Fit Issues We Encounter
During attic insulation installations, our crews frequently document these Electro-Air 16x25x5 fit problems in Day and Night systems:
Bowed filter media from cabinets with narrow rail spacing
Unseated frames where depth clearance is insufficient
Bypass gaps at corners allowing unfiltered air into the system
Forced insertion damage to filter gaskets and cabinet seals
One Pembroke Pines homeowner called us after noticing dust accumulation on supply vents despite installing a new filter. During their attic insulation assessment, we found the Electro-Air filter sitting at an angle—the cabinet rails were spaced for a different brand. Unfiltered air had been circulating for months.
Why Proper Fit Matters in South Florida
South Florida's humidity and heat amplify the consequences of an improperly seated filter:
Bypass air introduces moisture and particulates directly into ductwork
Restricted airflow from a crammed filter forces the blower motor to work harder
Increased energy consumption during peak cooling months
Accelerated coil contamination when filtration is compromised
Our attic insulation work puts us eye-level with air handlers baking in 140°F+ attic heat. We see how quickly an ill-fitting filter degrades under these conditions. Proper fit extends filter life, protects your equipment, and maintains the indoor air quality your system was designed to deliver.
"When we're up in attics installing insulation, we get a clear view of how filters actually sit inside Day and Night cabinets—and I'd estimate one out of every five Electro-Air 16x25x5 filters we come across isn't seated correctly. Homeowners assume if they can close the cabinet door, the filter fits. But I've pulled filters that looked fine from the outside and found quarter-inch gaps along the rails where air was bypassing completely. In South Florida humidity, that bypass air carries moisture straight to your evaporator coil. A two-minute measurement before ordering saves months of contamination buildup and the repair bills that come with it."
Essential Resources on Electro-Air 16x25x5 Air Filters
During attic insulation installations across Pembroke Pines, our crews work directly alongside Day and Night air handlers—and we've seen firsthand how filter selection impacts system performance. These resources from federal agencies and industry organizations provide the technical foundation behind the recommendations we make in the field.
1. Understand How HVAC Filters Protect Indoor Air Quality
Source: U.S. Environmental Protection Agency – Guide to Air Cleaners in the Home
When homeowners ask why we pay close attention to their filter setup during insulation work, we point them here. The EPA explains how MERV-rated filters capture airborne particles—the same contaminants we see accumulating on evaporator coils in South Florida attics when filtration falls short.
URL: https://www.epa.gov/indoor-air-quality-iaq/air-cleaners-and-air-filters-home
2. Learn Why Clean Filters Lower Energy Bills
Source: U.S. Department of Energy – Air Conditioner Maintenance
We've pulled Electro-Air filters from Day and Night cabinets that were so restricted, the blower was straining audibly. The DOE confirms what we observe in attics every week—clogged filters can increase energy consumption by up to 15%. In South Florida's cooling season, that adds up fast.
URL: https://www.energy.gov/energysaver/air-conditioner-maintenance
3. Decode MERV Ratings for Smarter Filter Selection
Source: National Air Filtration Association – Understanding MERV
Homeowners often ask us whether MERV 11 is "enough" for their Day and Night system. NAFA's technical guide explains exactly how these ratings are tested and assigned. We reference this resource when helping customers balance filtration efficiency against airflow requirements—especially in older air handlers we encounter during insulation assessments.
URL: https://www.nafahq.org/publications/
4. Explore Health Research on Indoor Air Filtration
Source: National Institute of Environmental Health Sciences – Indoor Air Quality
In our experience, families with allergy or asthma concerns benefit most from properly seated, high-efficiency filters. NIEHS research confirms what we see in Pembroke Pines homes—effective HVAC filtration measurably reduces indoor allergen and pollutant exposure. An ill-fitting filter undermines those health benefits entirely.
URL: https://www.niehs.nih.gov/health/topics/agents/indoor-air
5. Maximize System Efficiency With Proper Filter Maintenance
Source: ENERGY STAR – Heat & Cool Efficiently
Our technicians check filter condition on every attic insulation job because we know how quickly South Florida humidity and particulate load can overwhelm a neglected filter. ENERGY STAR recommends monthly inspections during heavy use—advice that aligns with what we've observed in local homes running AC systems year-round.
URL: https://www.energystar.gov/saveathome/heating-cooling
6. Access Official MERV Testing Standards
Source: American Society of Heating, Refrigerating and Air-Conditioning Engineers
When we recommend specific filter replacements for Day and Night systems, we're referencing ASHRAE Standard 52.2—the official testing methodology for particle removal efficiency. This technical standard helps us verify that the Electro-Air filters we suggest actually perform as labeled.
URL: https://www.ashrae.org/technical-resources/standards-and-guidelines
7. Review Federal Guidance on Residential Air Filtration
Source: CDC/NIOSH – Guidance for Filtration and Air-Cleaning Systems
This federal publication provides the technical basis for MERV recommendations in residential settings. We've found it useful when explaining to homeowners why a properly fitted Electro-Air 16x25x5 offers meaningful protection—and why a filter that doesn't seal correctly provides almost none.
URL: https://www.cdc.gov/niosh/docs/2003-136/
Our perspective: We include these resources because filter selection involves more than matching dimensions to a cabinet. During attic insulation work, we see the long-term consequences of improper filtration—coil contamination, restricted airflow, and equipment strain that shortens system life. These authoritative sources validate the guidance we provide based on what we observe in Pembroke Pines homes every day.
Supporting Statistics
Federal research confirms what our crews observe in Pembroke Pines attics every week. These statistics quantify the consequences we see firsthand when Electro-Air filters fail to seat properly in Day and Night cabinets.
1. Indoor Air Pollution Levels
Finding: Indoor pollutant concentrations often measure 2 to 5 times higher than outdoor levels—and can climb to 100 times higher in some cases.
What we see in the field:
Dark streaking along filter frame edges where unfiltered air slips past
Evaporator coils coated with debris that proper filtration would have captured
Homes sealed for months during South Florida's cooling season concentrating particulates continuously
Why it matters for filter fit: A quarter-inch gap along the cabinet rails allows concentrated indoor pollutants to bypass filtration entirely. The brownish film we find on coils tells the same story the EPA research tells with numbers.
Source: U.S. Environmental Protection Agency – Report on the Environment
URL: https://www.epa.gov/report-environment/indoor-air-quality
2. Energy Consumption Impact
Finding: Replacing a dirty or clogged filter with a properly fitted clean one can reduce air conditioner energy consumption by 5% to 15%.
What we observe in Day and Night systems:
Blower motors straining against restricted airflow produce a subtle whine
Undersized filters bow against tight cabinet rails—creating restriction and edge gaps simultaneously
Utility bills drop noticeably after customers correct filter fit issues
Real example: One Pembroke Pines homeowner replaced a bowing filter with a correctly dimensioned Electro-Air 16x25x5. Her next two utility bills showed measurable savings.
Why it matters in South Florida: Air conditioning runs nine months of the year. Every hour that overworked blower runs costs money.
Source: U.S. Department of Energy – Maintaining Your Air Conditioner
URL: https://www.energy.gov/energysaver/air-conditioner-maintenance
3. Household Energy Distribution
Finding: More than half of household energy consumption—52%—goes to heating and cooling.
What this means during attic insulation work:
We work directly with the equipment consuming the largest share of household energy
Small filtration problems compound into significant costs
A filter slightly too wide for cabinet rails restricts airflow to the biggest energy draw in the home
The connection homeowners miss: High summer electric bills often trace back to a filter that looked fine from the outside but wasn't seated correctly.
Our approach: We check rail spacing and depth clearance precisely because half the energy budget rides on unrestricted, properly sealed airflow.
Source: U.S. Energy Information Administration – Use of Energy in Homes
URL: https://www.eia.gov/energyexplained/use-of-energy/homes.php
4. Indoor Time and Air Quality Exposure
Finding: Americans spend approximately 90% of their time indoors.
What we hear from Pembroke Pines homeowners:
Parents worried about children with allergies
Retirees managing respiratory conditions
Households noticing dust accumulating faster than expected
What bypass air means for health: When an Electro-Air 16x25x5 leaves gaps in a Day and Night cabinet, that 90% indoor time becomes continuous exposure to unfiltered air.
Results we've documented: Customers report symptom improvements within weeks of correcting filter fit issues we identified during insulation work.
Source: American Lung Association – Clean Air Indoors
URL: https://www.lung.org/clean-air/indoor-air
Summary: How Research Aligns With Field Experience
Bottom line: Research and field experience point to the same conclusion—proper Electro-Air 16x25x5 installation in Day and Night systems matters more than simply closing a cabinet door.
Final Thought & Opinion
After years of working in Pembroke Pines attics—crawling past Day and Night air handlers, inspecting filter cabinets during insulation assessments, and seeing the long-term consequences of improper filter fit—we've developed a perspective that goes beyond manufacturer specs alone.
What This Guide Covers
This page answers the question we hear most: Does the Electro-Air 16x25x5 actually fit my Day and Night system?
Short answer: Yes, for most systems.
Complete answer requires understanding:
Cabinet configuration differences across model lines
Actual vs. nominal dimensions (15-3/8" x 24-3/8" x 4-3/8" actual)
Verification steps before ordering
Cross-reference part numbers
Common fit issues from field work
South Florida climate factors that amplify problems
Our Opinion
Filter fit is the most overlooked HVAC maintenance factor.
The industry emphasizes replacement frequency. That's good advice. But we've pulled month-old filters causing problems—not because they were dirty, but because they never seated correctly.
A fresh filter that doesn't fit performs worse than a used filter that does.
What we see repeatedly:
Brand-new MERV 11 filters with visible bypass gaps
Recently installed filters bowing against narrow rails
"Correct size" replacements forced into cabinets with insufficient depth
Replacement schedules assume the filter seals against the cabinet. When it doesn't, you're circulating partially filtered air no matter how often you swap filters.
The Attic Insulation Vantage Point
Our perspective differs because we see filter cabinets from a different angle—literally.
During insulation work, we're positioned alongside air handlers for extended periods. We notice things a quick filter swap doesn't reveal:
Dust patterns indicating where air bypasses the filter
Coil conditions reflecting months of filtration quality
Cabinet wear from filters forced rather than fitted
Temperature differentials between sealed and leaking systems
This vantage point shaped our conviction: measuring before ordering prevents problems no amount of filter changes can fix.
The South Florida Factor
Filter fit matters more here than in most markets.
Why Pembroke Pines conditions are demanding:
AC runs almost year-round
Systems cycle continuously during summer
Attic temperatures exceed 140°F regularly
Humidity stresses equipment and filtration media
The consequences of "mostly fits":
Bypass air introduces moisture directly to evaporator coils
Restricted airflow forces blowers to run longer in extreme heat
Margin for error is smaller than in temperate climates
Our recommendation: Treat filter fit as seriously as filter quality. A MERV 8 that seals completely outperforms a MERV 13 with bypass gaps.
The Two-Minute Investment
One takeaway from this guide: Measure your Day and Night cabinet before ordering.
Not the old filter. Not the cabinet door opening. The actual interior dimensions:
Width at the rails — minimum 15-3/8"
Height clearance — minimum 24-3/8"
Depth from seal to back wall — minimum 4-3/8"
Two minutes with a tape measure prevents:
Wasted money on incompatible filters
Forced installations damaging filter media
Bypass gaps compromising indoor air quality
Energy waste from restricted or leaking airflow
Accelerated coil contamination in humid conditions
Our Commitment
We created this guide because filter compatibility questions come up constantly during attic insulation work—and online answers often lack field-tested specificity.
What this guide reflects:
Specifications verified through direct experience
Model compatibility confirmed in actual installations
Statistics from federal agencies matching our observations
Expert perspective from technicians working with this equipment daily
Our belief: Proper filter fit is foundational to indoor air quality, energy efficiency, and equipment longevity.
FAQ on Electro-Air 16x25x5 Air Filters
Q: What are the actual dimensions of the Electro-Air 16x25x5 air filter?
A: Actual dimensions are 15-3/8" x 24-3/8" x 4-3/8".
Nominal size: 16" x 25" x 5"
Actual size: 15-3/8" x 24-3/8" x 4-3/8"
Always measure cabinet against actual dimensions
Ordering by nominal specs causes fit problems
Field note: We regularly find filters that never seated correctly because homeowners ordered based on package labeling.
Q: What MERV rating is the Electro-Air 16x25x5?
A: MERV 11.
Captures:
Dust and pollen
Mold spores
Pet dander
Particles 1.0–3.0 microns
Our observation: MERV 11 handles South Florida conditions well—when properly sealed. A MERV 11 with bypass gaps underperforms a seated MERV 8. Fit matters more than rating.
Q: How often should I replace my Electro-Air 16x25x5 filter?
A: Every 6–12 months. Check quarterly.
Replace sooner with:
Pets in home
Allergy sensitivities
Nearby construction
Year-round AC use
Pembroke Pines recommendation: 6-month cycles outperform 12-month schedules in homes running AC continuously. Gray, loaded media means replace now—regardless of calendar.
Q: What filters are compatible replacements for the Electro-Air 16x25x5?
A: Five cross-reference options:
Electro-Air (OEM): MF0-E02
Carrier: FILCCCAR0016
Bryant: FILBBCAR0016
Honeywell: FC100A1029
GeneralAire: 4541
Caution: Cross-reference confirms dimensions—not cabinet fit. We've installed "correct" part numbers that didn't seat due to rail spacing. Measure your cabinet regardless.
Q: Will the Electro-Air 16x25x5 fit my Day and Night HVAC system?
A: Yes, for most models.
Compatible Day and Night systems:
FEM4X — Yes
FE4A — Yes
FB4C — Yes (standard rack)
FX4D — Yes
FV4C — Verify rail spacing
Required cabinet minimums:
Width at rails: 15-3/8"
Height clearance: 24-3/8"
Depth: 4-3/8"
Field observation: Day and Night shares lineage with Carrier/Bryant. Cabinet designs often align. However, older FV4C units have narrower rails causing filter bowing. Model number doesn't guarantee fit—your tape measure does.
Learn more about HVAC Care from one of our HVAC solutions branches…
Filterbuy HVAC Solutions - Miami FL - Air Conditioning Service
1300 S Miami Ave Apt 4806 Miami FL 33130
(305) 306-5027
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