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Ventmax 1200
Acid Air Scrubbers

VentMax is the future of air scrubbing and environmental control in poultry sheds.

Ventmax 1200 Installation

VentMax end of house wet acid scrubbers are identified as an appropriate BAT for reducing ammonia emissions to air from broiler, broiler breeder houses and layers.

(Commission Implementing Decision (EU) 2017/302 – BAT 31 c.1).

Advanced air scrubber

These units are designed to provide all the ventilation needs of the fully stocked houses across the normal range of operating conditions. Each air scrubber unit is equipped with 8 high-velocity fans mounted for a high velocity throw as required. Air is drawn into the houses via inlets located along the sides of the building. It is then drawn into the air scrubber units through a single large internal inlet where it passes through a filter system before being expelled through the fans.

Continuous Ventilation

Each poultry house will require roof ridge mounted high-velocity fans and gable end fans which are provided as emergency back-up to the continuous ventilation system. Under the normal range of operating conditions, the ridge fans and gable-end fans are shut down. The emergency back-up system is available to maintain the house environment and ensure bird welfare in the event of extreme heat or system failure.

Ventmax 1200 Installation
Ventmax 1200 Installation

Automatic control

The whole ventilation system is automatically controlled via the shed “building management system” that is normally accessed from the main electronic panel located in the control room/entrance to each house. Continuous recording via an electronic logbook is in place and can be accessed remotely.

How Ventmax works

A continuous ventilation system draws air (by suction principle) through a single point of outlet from the poultry house and across the air scrubber.

Ammonia in the air extracted from the house reacts with and dissolves into the acidic substrate within the reactor core. The wet acid scrubber units use sulphuric acid (96%) to maintain a pH value below 4 in the scrubbing liquid at the reactor. The solution is sprayed over an extended surface area filter and scrubber media as the air is passed through the system and extracted through high pressure fans and end of house chimneys. The solution is automatically dosed and regulated using a PH sensor. A dirty water filtration system and electrolytic metering ensures continuous operation while discharging treated water to the dirty water tank storage system.

Stage 1

Air is drawn in through an opening at the end of the poultry house (8m x 1m) through optional louvres and/or stainless steel filter mesh which removes large particulates.

Stage 2

The air is then drawn through a water cascade which removes dust and particulate matter before being drawn up through the media filter.

Stage 3

The air is then passed through a cross flow packed filter arrangement also known as the reactor. (Advanced High Surface Media), where more dust is removed, and the ammonia gas reacts and is absorbed into the acid/water solution.

Stage 4

The air is finally passed through a mist eliminator to ensure water droplets remain within the unit, before being expelled to atmosphere through high-pressure fans.

Ammonia scrubbing technology

A sump wash tank with cyclone pumps provide continuous distribution and recirculation of water to the top of the packed tower.

A self-cleaning and replaceable in-line filtration system removes solids and replacement with fresh water.

A dosing station automatically introduces the chemical to the wash cycle to react with and remove ammonia.

The scrubber has a separate acid IBC storage tank and bund for ease of handling which are delivered to site using a specialist contractor according to use (normally once every 2 months).

The dirty water must be discharged into an onsite dirty water storage tank and removed once full.

The unit will require a three-phase electrical supply, connection to a drain to dirty water tank and fresh water supply.

Ventmax 1200

Ventmax Plan Views

Benefits for planning applications

VentMax treats air leaving your poultry house, reducing dust, ammonia and odour levels by up to 90%, aiding environmental compliance and supporting expansion plans. VentMax scrubber units aid planning applications especially in sensitive areas and ensure both EA and NRW compliance for environmental permits.


Maximum Air Capacity A30/H65 120,000 m3/h
Minimum Air Capacity A30/H65 24,000 m3/h
Scrubbing Residence Time A30/H65 0.6 sec
Outlet Concentration NH37 @33m3s 2.00 PPM
Number of Fans 4.00
Packed Filter Media 19.2 m3
Packed Bed Surface 150.00 m2
Maximum Power Consumption 400V 15.00 kW
Acid Holding Tank (B2/W45) 800 ltr
Operating Efficiency
Maximum Removal Efficiency NH3 100%
Minimum Removal Efficiency NH3 75%
Average Removal Efficiency NH3 92%
Average Dust Removal Efficiency PM2.5 97%
Average Odour Removal Efficiency ouE 40%
Average Water Consumption Fresh 19.2 m3
Average Acid Consumption 96% 150.00 m2
Average Power Consumption Daily 15.00 kW
Average Power Consumption Annual 800 ltr
Frame Painted Steel
Wash Tank Fibreglass
Lining Plastic
Controls Carell
Pipework Plastic
Acid Tank Plastic
Filter Media Plastic
Height mm 4500
Width mm 4200
Length mm 8200
Weight kg 4000
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