Tools & DIY · Head-to-head
Weller Zero Smog EL Kit 1 vs Hakko FA-400 Smoke Absorber
Which should you buy? Our verdict on both, pulled from our full The Best Solder Fume Extractors: 4 Compared (and One to Skip) comparison.
The Weller is the only unit here whose own documentation names an H13 particle filter and an activated carbon filter working together, which is what rosin flux fume actually calls for. The Hakko FA-400 is a fraction of the money and does far less, but Hakko is straight about what it does.
Weller Zero Smog EL Kit 1
Buy itThe only unit here whose manual specifies a particle filter and an activated carbon filter working together, with the airflow and vacuum numbers to go with it.
- Weller's manual specifies a combined H13 filter rated at 99.95 percent particle separation down to 0.12 um in combination with an activated carbon filter.
- Published figures are unusually complete: 150 m3/h maximum quantity supplied, 2,500 Pa maximum vacuum at 230 V and 2,100 Pa at 120 V, 110 W power draw.
- An M5 pre-filter changes separately from the main cartridge, and a filter warning light plus a documented replacement schedule tell you when the carbon is spent.
- Big and heavy for a hobby desk at 335 x 360 x 445 mm and 8.6 kg, and Weller positions it for placement under or beside the bench rather than on it.
- Weller does not publish a noise figure for this unit.
- The manual states it is designed as a surface extraction unit and is not suitable for extracting fumes directly from the soldering gun.
Hakko FA-400 Smoke Absorber
Buy itA carbon pad in front of a small fan, but Hakko publishes real numbers for it and says outright that the airflow figure was taken with the filter installed.
- Hakko publishes maximum suction of 1.0 to 1.1 m3/min mounted vertically and 0.4 to 0.5 m3/min horizontally, and states that the figure is measured with a filter present.
- Noise is published at 48 dB on 50 Hz and 51 dB on 60 Hz, measured one metre from the face of the unit.
- Carries Hakko's ESD SAFE marking, which the company defines by an electrostatic attenuation test to MIL-STD-3010A method 4046, and weighs only 0.91 kg.
- The standard filter is a thin carbon pad, so its gas-phase capacity is small and it saturates.
- Hakko's spec page does not describe the optional particulate filter as HEPA rated.
- At around one cubic metre per minute the intake has to sit within a few centimetres of the tip to catch the plume at all.
Side by side
The 8 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| Weller Zero Smog EL Kit 1 Our pick | Hakko FA-400 Smoke Absorber | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Someone soldering most days, or covering two benches, who wants a maker that documents the gas stage as clearly as the particle stage. | Occasional hobby soldering where the realistic goal is keeping the plume off your face rather than cleaning the room's air. |
| Price tier | $$$ · premium | $ · budget |
| Filter media (as published) | M5 pre-filter, H13 particle filter plus activated carbon filter | Activated carbon pad; optional particulate filter |
| Particle rating | 99.95 percent down to 0.12 um (combined H13 filter) | None for the standard filter |
| Published airflow | 150 m3/h maximum quantity supplied | 1.0 to 1.1 m3/min vertical; 0.4 to 0.5 m3/min horizontal |
| Is the airflow stated with the filter fitted | Method not stated | Yes, Hakko states measured with a filter present |
| Vacuum or static pressure | 2,500 Pa at 230 V; 2,100 Pa at 120 V | Not published |
| Noise | Not published | 48 dB at 50 Hz; 51 dB at 60 Hz, at 1 m |
| ESD construction (maker's claim) | ESD-compatible design stated in the manual | ESD SAFE marking (MIL-STD-3010A method 4046) |
| How it captures | Flexible arm and funnel nozzle at the bench surface | Benchtop box, horizontal or vertical |
Which one is right for you?
Pick the Weller Zero Smog EL Kit 1 if
someone soldering most days, or covering two benches, who wants a maker that documents the gas stage as clearly as the particle stage.
Know before buying: big and heavy for a hobby desk at 335 x 360 x 445 mm and 8.6 kg, and Weller positions it for placement under or beside the bench rather than on it.
Pick the Hakko FA-400 Smoke Absorber if
occasional hobby soldering where the realistic goal is keeping the plume off your face rather than cleaning the room's air.
Know before buying: the standard filter is a thin carbon pad, so its gas-phase capacity is small and it saturates.
The bottom line
Our overall pick is the Weller Zero Smog EL Kit 1 - The only unit here whose manual specifies a particle filter and an activated carbon filter working together, with the airflow and vacuum numbers to go with it. Choose the Hakko FA-400 Smoke Absorber instead if occasional hobby soldering where the realistic goal is keeping the plume off your face rather than cleaning the room's air.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Solder Fume Extractors: 4 Compared (and One to Skip).