TV Show
GreenBiz with Marco Columbro
aired on SKY
(full episode)
ETC
GROUP
TV
| Feature Value Filter height 50 cm Extractor height 44 cm Total height 94 cm Filter depth 56 cm Width 62 cm Cold water supply 1/2" Condensate drain to sewer 1" Inlet diameter Ø 150 mm Outlet diameter Ø 140-150 mm Feature | Value |
|---|---|
| Filter height | 50 cm |
| Extractor height | 44 cm |
| Total height | 94 cm |
| Filter depth | 56 cm |
| Width | 62 cm |
| Cold water supply | 1/2" |
| Condensate drain to sewer | 1" |
| Inlet diameter | Ø 150 mm |
| Outlet diameter | Ø 140-150 mm |
Technical Data Sheet
User Manual
HIGH TEMPERATURE
ASPIRATORS
+300°
Code. INOX.4.EBR280
ETC Group S.r.l. Sole Shareholder
Industrial area Pirano, Tavullia
Str. Delle Campagne, 10
61010 Tavullia PU - ITALY
Tel.
+39 0721 1839937
+39 0541 955062
+39 0541 1646150
WhatsApp-web +39 373 7755779
E-Mail DEPARTMENTS
informazioni@etcgroupsrl.biz
commerciale@etcgroupsrl.biz
tecnico@etcgroupsrl.biz
contabilita@etcgroupsrl.biz
VAT and Tax Code: IT 04083110405
Reg. of companies of Pesaro N. REA - PS – 196574
- Scrubbers for Wood-fired Ovens
- Scrubbers for Electric Ovens
- Scrubbers for Charcoal Grills
- Stainless Steel Exhaust Fans
Technical Report – Description and Modification of Scrubber System AH400+
Model: Particulate Scrubber AH400+
Subject: Technical description including modification to the washing and mechanical filtration system
1. Current configuration of the washing system
The AH400+ particulate scrubber is equipped with two main rows of spray nozzles installed transversely to the airflow:
Each row consists of 5 Spiral Nozzles SJ3/8-SS316-12030 (3/8” BSPT male connection, stainless steel SS316).
Each nozzle delivers 19.3 L/min at 2 bar.
Total flow rate of the two rows: 193 L/min (19.3 x 5 x 2).
Additionally, two supplementary nozzles are installed at the initial section of the inlet hopper, immediately after air entry, to promote early saturation and capture of heavier particles.
2. Multi-stage washing system
The washing system is organized into two sequential stages, separated by internal baffles that divide the scrubber chamber:
The second washing stage is arranged in parallel to the first but shifted laterally by approximately 70 cm (to the right or left, depending on the air inlet side).
This lateral offset forces the airflow to move diagonally in a serpentine pattern, increasing the pathway and the residence time in the treatment area.
The second stage is also positioned 70 cm to the right of the first, creating a parallel geometry that enhances the washing efficiency.
3. Roll-up system (mechanical filtration barrier)
At the end of the second stage, the air passes through a passive mechanical filtration system:
Two opposing rows of stainless-steel tubes (40 mm diameter), arranged horizontally across the airflow.
These tubes form the roll-up system, which traps lighter suspended particles through direct impact and surface condensation.
4. Geometry of the washing throats
The scrubber body includes two shaped throats simulating a Venturi
profile:
Top width: 45 cm
Bottom width: 25 cm
Throat height: 40 cm
Depth: 90 cm
These throats accelerate the airflow in the narrowed section, promoting
inertial particle separation.
5. Airflow path inside the scrubber
The airflow follows a forced and guided path:
Enters the hopper and meets the first spray nozzles.
Is deflected downward by a “C”-shaped plate immersed in water, forcing a U-turn.
Passes through the first throat and is shifted 70 cm laterally toward the second stage.
In this section, it again encounters the nozzles and the roll-up system.
A second deflector guides the air downward across the water surface (“surface washing”), forming the second throat.
Finally, the air rises through the outlet hopper and is conveyed to the exhaust or ducting system.
6. Objective of the modification
The goal of this internal configuration and modification is to:
Optimize particulate removal efficiency, including ultrafine particles
Extend the contact time between contaminated air and wet surfaces
Improve airflow distribution, avoiding turbulence or preferential paths
Simplify inspection and routine maintenance operations
Airflow behavior and abatement systems in the AH400+ model
Flow speed in the Venturi throat
In the AH400+, air passes through a shaped throat with a constant width of 900 mm and variable height:
Inlet section (900 x 400 mm): ≈ 4.63 m/s (at 6000 m³/h)
Narrow section (900 x 250 mm): ≈ 7.41 m/s (at 6000 m³/h)
This acceleration creates a natural Venturi effect, favoring the impact between suspended particles and water droplets, enhancing inertial and turbulent separation.
Flow behavior in the second throat
After the second washing stage and roll-up system, the airflow is again deflected downward through a second shaped throat:
The air is already saturated with humidity and slowed down by the roll-up section.
It is forced to skim the water surface (“surface washing”), producing a low-energy contact and final sedimentation.
Though geometrically similar to the first, the second throat operates in different dynamic conditions, taking advantage of lower residual flow energy for gentle separation.
This phase is critical for capturing light, already-wetted particles that tend to follow the airflow rather than settle naturally.
Roll-up system in stainless steel – Technical description
Between the two throats lies the roll-up system, consisting of two opposing rows of stainless-steel tubes (AISI 304, Ø40 mm):
Passive mechanical filtration: The humid air passes through a grid of metal tubes that trap fine particles via direct impact.
Accelerated condensation: The wet tube surfaces act as collection points for particles, mimicking a passive cyclone without moving parts or extra energy consumption.
Commercial advantages of the AH400 system
The internal design of the AH400, with its serpentine airflow, double throat, and integrated roll-up system, ensures:
Particulate removal >95%, even at high flow rates (up to 6000 m³/h)
Low-maintenance system: no filters to replace, only periodic water rinsing
Reliable, continuous operation, ideal for grills, biomass boilers, wood-fired ovens, and food-processing systems
Fully washable stainless-steel body, corrosion-resistant and built for long service life
Low water and power consumption, with a high-efficiency pump (1.2 kW or upgraded model)
Compatibility with automated drainage and water treatment systems, ready for industrial installations
A system that never backs down: the AH400 is ready for anything
The AH400 particulate scrubber is designed to tackle any gaseous or solid pollution source, provided it contains particulate and operates within water-compatible temperatures.
Wood combustion smoke, charcoal grills, biomass, pizza ovens, boilers, stoves, coffee roasters, greasy kitchen vapors... You name it, the AH400 handles it.
And it does so with hydraulic and dynamic intelligence:
High-flow nozzles that strike airborne particles
Serpentine flow with forced deviations and Venturi throats
Stainless-steel roll-up system that traps what escapes
Dual-stage washing, expandable with ozone, separators, or automatic valves
Robust AISI 304 stainless-steel construction: washable, durable, and compact
The air that enters comes out clean.
And that’s not just a claim — it’s the result of a system engineered with fluid dynamics and combined filtration logic.
Technical-Commercial Report
Soot Scrubber AH400 - Upgraded Version
Subject: Technical and functional description of the AH400 model in its upgraded version with counterflow third-stage washing and enhanced pump
1. General Description
The AH400 Upgraded represents the enhanced evolution of the standard AH400 model.
Designed to handle intensive emissions, this system can effectively treat any source of smoke, soot, oily vapors, or mixed particulate loads.
From food service applications to wood combustion systems, the AH400 Upgraded is the ideal choice for installations requiring continuous operation, high airflows, and advanced filtration performance.
2. Advanced Washing System Configuration
The washing system is structured in three active stages, powered by an enhanced 2.2 kW pump (Lowara CM 16/3). This configuration ensures full coverage even under peak conditions:
First stage (horizontal):
Two arrays of 5 Spiral Nozzle SJ3/8-SS316-12030 for a total flow rate of 193 L/min at 2 bar.
Provides high-saturation primary washing.
Second stage (counterflow – specific to upgraded version):
A group of nozzles oriented against the airflow, positioned between the first and second stages.
This "counterflow" wash creates high turbulence, maximizing the capture of fine dust and greasy aerosol particles.
Third stage (inline extension):
An additional group of nozzles placed 30 cm laterally between the first and second stage, increasing air washing time and completing saturation.
3. Roll-Up System in AISI 304 Stainless Steel
Located between the second and third stages is the roll-up system, composed of Ø40 mm horizontal stainless steel pipes:
Acts as a passive mechanical barrier, trapping wet particles via direct impact.
Promotes residual condensation before the final washing section.
Requires no ordinary maintenance, with a self-cleaning, always-wet surface.
4. Dynamic Throats with Venturi Effect
The scrubber body integrates two tapered throats:
First throat: Accelerates the airflow from 4.63 m/s to 7.41 m/s (airflow rate: 6000 m³/h), creating a strong Venturi effect for inertial separation.
Second throat: Designed with shaped metal sheet and water surface transition, it completes the filtration cycle, forcing purified air out after a double redirection and settling phase.
5. Technical Specifications – AH400 Upgraded
| Feature | Value |
|---|---|
| Recommended Airflow | Up to 6000 m³/h |
| Number of Washing Stages | 3 (including one counterflow) + roll-up system |
| Roll-Up System | Ø40 mm stainless steel pipes |
| Venturi Throats | 900x400 mm → 900x250 mm |
| Circulation Pump | ETC CM 16/3 - 2.2 kW |
| Structure | AISI 304 stainless steel, 1.5 mm thick |
| Removal Efficiency | >95% particulate – >80% oily mists |
| Maintenance | Minimal – fully washable system |
6. Operational Advantages
Complete and modular treatment system, suitable for all emission types.
Designed to withstand heavy loads – ideal for kitchens with grills, ovens, or continuous combustion.
Easy integration – compatible with automatic drains and wastewater treatment.
Long-lasting even in aggressive environments, thanks to its reinforced stainless-steel structure.
AH400 Upgraded: When Power and Precision Are a Must
Whether it's charcoal, wood smoke, or professional grill fumes, the AH400 Upgraded is built to handle it all.
Thanks to its counterflow washing, enhanced pump, and three-stage internal system, it tackles even the toughest challenges with no compromises.
Think it. Power it on… and it scrubs it away.
