What a Smoke Eater Is — and Isn't
In the commercial smoking establishment market, 'smoke eater' typically refers to a ceiling-mounted or wall-mounted electrostatic precipitator (ESP) or media filtration unit designed to continuously filter air in a space where smoking occurs. These are industrial-grade air cleaning devices — not residential air purifiers — designed for the continuous, high-load conditions of a smoking lounge or casino floor. The category includes several distinct technologies that perform very differently.
Electrostatic Precipitators (ESP)
Electrostatic precipitators are the most common commercial smoke eater technology. They charge airborne particles with a high-voltage ionizing wire, then collect the charged particles on oppositely-charged collection plates. Unlike media filters, the plates are washable and reusable — there are no disposable filter elements to replace.
How ESP works: Air is drawn through the unit by a blower motor. The ionizing section charges particles to +12,000 to +15,000 volts DC. The collection section contains alternating grounded and positively-charged plates — charged particles migrate to and deposit on the grounded plates. Clean air exits through a carbon post-filter.
Particle removal efficiency: A clean ESP removes 90–98% of particles at 0.3 microns. Efficiency drops significantly as plates accumulate deposits — a heavily loaded ESP may drop to 60–70% efficiency or less. Regular cleaning is essential.
Gas and odor removal: ESP does not remove gases or VOCs. The activated carbon post-filter handles some odor compounds but is insufficient as the primary gas removal mechanism. ESP must be paired with adequate ventilation for comprehensive smoke control.
Ozone byproduct: All corona discharge ESP systems produce small amounts of ozone. Most well-designed units produce ozone below 0.05 ppm (EPA safety limit of 0.07 ppm 8-hour average). Regular cleaning reduces ozone production.
ESP Sizing
(This is 10–15 recirculation passes per hour — different from ACH,
as recirculation filters and returns air rather than exhausting it.)
Required ESP CFM = Room Volume / 4 to 6 (minutes per pass)
Example: 1,200 cu ft room
Target: Full recirculation every 5 minutes
Required CFM = 1,200 / 5 = 240 CFM
For heavy use, target every 4 minutes:
Required CFM = 1,200 / 4 = 300 CFM
Media Filtration Smoke Eaters
Media filtration commercial smoke eaters use multi-stage mechanical filter media — typically a pre-filter, a dense fiberglass or carbon media, and a HEPA-grade final filter — in a high-flow housing designed for continuous duty. These are essentially commercial-grade air purifiers with higher airflow and more filter media mass than residential units.
Advantages over ESP: No ozone production, simple maintenance (filter replacement), consistent efficiency throughout filter life. Disadvantage: Ongoing filter replacement cost — commercial filters in cigar lounges may require replacement every 2–4 months.
UV-C + Carbon Commercial Units
Some commercial smoke eaters incorporate UV-C light to destroy microorganisms in addition to HEPA and carbon filtration. UV-C is effective against biological contaminants but has no meaningful effect on smoke particles or VOCs — UV-C adds cost without adding smoke removal capability for a residential cigar lounge.
Ceiling-Mount vs Wall-Mount vs Floor-Standing
- Ceiling-mounted: The most effective position for capturing smoke before it stratifies at ceiling level. Standard configuration for commercial cigar bars and lounges. Requires structural mounting and electrical at ceiling height.
- Wall-mounted: Installed high on a wall near ceiling level. Nearly as effective as ceiling mount for smoke capture. More accessible for cleaning and maintenance. A practical alternative when ceiling mounting is not feasible.
- Floor-standing: Less effective at capturing the smoke plume before it disperses (smoke rises; a floor-level unit captures already-dispersed smoke). Appropriate as a supplemental unit or where mounting is not possible.
Combining ESP and Ventilation: The Complete System
A complete cigar room air management system combines ESP (or a high-quality media filter) with mechanical ventilation. The two systems address different parts of the problem:
| Contaminant | ESP / Filter | Ventilation (Exhaust) |
|---|---|---|
| Visible smoke particles | Primary removal method | Dilution and exhaust |
| VOCs and odor compounds | Carbon post-filter (partial) | Primary removal method |
| Carbon monoxide | Not effective | Required — only method |
| Nitrogen oxides | Not effective | Required — only method |
| Residual smoke odor (post-session) | Activated carbon (partial) | Post-session ventilation purge |
Neither system alone is sufficient for a serious cigar room. The correct design has both: ventilation provides the safety function (CO removal) and primary gas/VOC control; the ESP or air purifier provides visible particle control and supplemental odor management.
Commercial Products Worth Knowing
- Smokeless: Wall and ceiling ESP units specifically designed for cigar and cigarette smoke; models range from residential to commercial capacity (SL-1000 series covers 600–1,200 sq ft).
- Smokemaster: Long-established commercial ESP manufacturer with both media and ESP units. Frequently specified for casino and hospitality applications.
- Field Controls (TRIO): Combination ESP and UV units for residential and light commercial applications. Good documentation and sizing guides.
- Rabbit Air: Not a traditional smoke eater brand, but their BioGS and MinusA2 series with carbon-enhanced filters are well-regarded for residential cigar rooms in the 200–400 CFM CADR range.