HVAC emergency in Chicago? Call Bernie's Heating & A/C Service now! Same-day service available for all heating and cooling emergencies.
Last fall a family in Edgewater called us wanting a $$$ whole-home HEPA system. After we tested there furnace, we told them to buy 3 portable HEPA units from Costco for $$ instead. It worked better for there situation and saved them a lot of money.
True HEPA filters capture 99.97% of particles 0.3 microns or larger—but most residential furnaces can't handle them without a booster fan. We'll tell you if whole-home HEPA makes sense, or if portable units are a better fit.
HEPA stands for High Efficiency Particulate Air. Here's what that actually means for your home.
The Official Definition:
Captures 99.97% of particles 0.3 microns or larger
What 0.3 Microns Means:
1/200th the width of a human hair—microscopic particles invisible to the naked eye
MERV Rating Equivalent:
HEPA is essentially MERV 17-20 (MERV scale for residential only goes to 16)
What HEPA Does NOT Catch:
Not all "HEPA" filters are actually HEPA. Here's how to spot marketing nonsense:
Bottom line: If it doesn't say "True HEPA," it's not HEPA. It's like "military-grade" flashlights—meaningless marketing. Don't pay premium prices for fake HEPA filters.
Here's the technical challange nobody talks about when selling you HEPA systems:
HEPA filters are DENSE. That's how they catch microscopic particles—by forcing air through tightly woven fibers. But density = resistance.
Residential furnaces aren't designed for this. Your standard furnace blower is built to push air through a MERV 8-11 filter. HEPA is like asking it to push through a brick wall.
Most residential furnaces can't handle true HEPA without a booster fan. Companys that install HEPA without addressing static pressure are setting you up for failed blower motors.
Seperate cabinet with its own fan that pulls return air through HEPA, then returns cleaned air to supply ductwork.
Pros: Treats whole house, true HEPA performance, doesn't strain furnace blower
Cons: Expensive, requires space, ongoing filter replacement cost
Replaces standard filter rack, includes booster fan to overcome HEPA restriction.
Pros: Inline with system, less expensive than bypass
Cons: May still restrict airflow on older furnaces, professional sizing needed
Consumer units (Blueair, IQAir, Coway) placed in bedrooms/main living areas.
Pros: Cheap, no installation, proven effective, target specific rooms
Cons: Loud, need multiple units, manual filter changes
Best for: Budget-conscious homeowners who want HEPA where it matters most (bedrooms)
Honest answer: For most Chicago homes, 2-3 portable HEPA units ($$ total) work better than a $$$ whole-home system. We install whole-home HEPA when you ask, but we'll tell you if portables make more sense.
Chicago has specific seasonal and year-round allergens that HEPA filtration can help with. We see this from Rogers Park to Bridgeport, North Center to Hyde Park:
HEPA filtration isn't a one-time purchase. Here's the annual cost transparency:
Consider lifecycle cost: HEPA systems require recurring filter replacements in addition to installation. A MERV 11 media filter usually has a lower upfront and recurring cost. We can compare current filter prices before you choose.
HEPA is overkill for most homes. Here's when it makes sense—and when it doesn't:
Our recommendation: HEPA is overkill for most homes. A MERV 11-13 media filter ($$ installed) catches 80-90% of what HEPA does at 1/4 the cost and 1/3 the ongoing expense.
We'll install whole-home HEPA if you want it and your system can handle it. But we're not going to oversell you on something you don't need. That's not how we do business.
Proper HEPA installation requires measuring static pressure to ensure your system can handle it.
Measure static pressure to verify your furnace can handle HEPA restriction
Mount bypass cabinet or filter housing, wire booster fan to furnace controls
Verify static pressure stays under 0.5" W.C. (industry safe limit)
2-4 hours total installation time, includes cleanup and instruction
True HEPA filters capture 99.97% of particles 0.3 microns or larger. That includes pollen (10-100 microns), mold spores (3-40 microns), dust mite debris (5-20 microns), pet dander (5-10 microns), and bacteria (0.3-10 microns). HEPA does NOT filter gases, odors (VOCs), or viruses smaller than 0.3 microns—youd need UV or PCO systems for those.
Whole-home bypass HEPA systems fall in the $$–$$$ range, depending on the cabinet, booster fan, and ductwork. Annual filter replacement adds a recurring cost. Portable HEPA units in the $–$$ range are often more cost-effective for targeting bedrooms.
If you have diagnosed asthma or severe seasonal allergies triggered by airborne particles (pollen, mold, dander), HEPA filtration can help. But for mild allergies, a MERV 11-13 media filter ($$ installed) catches 80-90% of what HEPA does at 1/4 the cost. HEPA is overkill for most homes.
Whole-home HEPA filters typically need annual replacement. Pre-filters can extend HEPA life, while portable units have their own replacement schedule. We'll show you the current filter requirements and costs before installation.
Most residential furnaces can't push air through true HEPA filters without a booster fan. HEPA filters are dense and restrict airflow significantly. We measure static pressure before installation to ensure your system can handle it. Bypass systems ($$–$$$) include their own fan. Installing HEPA without addressing static pressure can burn out your blower motor.
Honest answer: For most Chicago homes, 2-3 portable HEPA units ($$ total) work better than a $$$ whole-home system. Portables let you target bedrooms where you spend 8 hours sleeping. Whole-home HEPA makes sense if you have severe allergies affecting multiple family members and need consistent filtration everywhere. We install whole-home systems when asked, but we'll tell you if portables make more sense for your situation.
We'll measure your systems static pressure, discuss your allergy concerns, and recommend the most cost-effective solution. Serving Lakeview, Lincoln Park, Wicker Park, Logan Square and all Chicago neighborhoods.
No upselling. No "HEPA-type" scams. Just honest technical advice from techs whos been doing this since 1992.