Negative-Pressure Exhaust Fans
Large wall fans that pull air out of the house to keep the air fresh and temperature under control.
Climate Control · G04
Ventilation Windows
Adjustable inlets that let fresh air in and guide it across the house.
- Controls where fresh air enters
- Adjustable opening
- Works with the exhaust fans
Sizes and configuration are customised to the project; details are agreed with you before quotation.
Overview
Ventilation windows (inlets) open and close to control where fresh air comes in. The opening is adjusted so that air flows at the right speed and does not blow directly onto the pigs. They are usually controlled together with the exhaust fans.
Features
- 01
Controls fresh air entry
Opening size sets air speed.
- 02
Adjustable
Manual or motorised.
- 03
Works with exhaust fans
Part of the negative-pressure system.
Specifications
Typical reference values. Final dimensions, materials and configuration are customised to your project and confirmed with you before quotation.
| Characteristic | Description |
|---|---|
| Type | Side inlet or ceiling inlet |
| Control | Manual or motorised |
| Material | Plastic and galvanised steel |
| Insulation | Insulated types available |
| Number | Set by house length and airflow |
| Customisation | Yes. Sizes, materials and configuration are adapted to the project. |
| Installation | Supported by HNYZ installation teams; scope agreed per project. |
| Packing and transport | Packed for sea or road shipping; method agreed per order. |
| Warranty | Agreed per project. |
| Certificates | Please ask for the documents required in your market. |
Where it is used
- Pig houses with negative pressure
- Winter minimum ventilation
- Draught-free air distribution
Why HNYZ Group
One company for planning, supply and installation, so the equipment fits the rest of the farm.
- 50
- Installation teams
- 3,000
- Completed projects
- 50+
- Countries served
Service
Pre-sales
- Requirement analysis
- Layout and equipment list
- Quotation agreed in detail
Installation
- Installation by HNYZ installation teams
- Commissioning and testing
- Staff training
After-sales
- Spare parts list with the order
- Technical support
- Support for expansion
Frequently asked questions
How many inlets do I need?
It depends on the airflow and the house length. We calculate it.
Can inlets be linked to the controller?
Motorised inlets can.
How are the fans sized?
From the house volume, pig number and peak outside temperature. We calculate the airflow and propose the fan count.
Do I need cooling pads?
In hot climates, pads cool incoming air by evaporation and are common. In cold climates, heating matters more.
Can alarms be added?
Yes. Controllers can sound an alarm when temperature goes out of range, and monitoring can be added.
What happens in a power cut?
Houses need a plan for power cuts: alarms, a generator, or emergency openings. We discuss options with you.
How much does ventilation cost to run?
Fan power is a major part of running cost. Variable-speed fans and good design can lower it.
Are sizes and configurations fixed?
No. Dimensions, materials and configuration are customised to your herd size, climate and local rules, and agreed with you before quotation.
Are the specifications on your product pages final?
They are typical reference values to help you compare. Final specifications are confirmed with you before quotation.
Who installs the equipment?
Our installation teams install and commission the equipment. The scope for each project is agreed in the contract.
What warranty do you give?
Warranty terms depend on the equipment and are agreed per project in the contract.
Enquiry
Ask about this product
Send us your herd size, site and timeline. We reply with a recommended configuration and a quotation.
What happens next
- 1
You send your project details
Herd size, site, land and target start date. Rough numbers are enough.
- 2
We reply with a layout and an equipment list
Our team reviews your requirements and proposes a configuration.
- 3
We agree the details with you
Sizes, materials and scope are confirmed before any quotation.
- 50
- Installation teams
- 3,000
- Completed projects
- 50+
- Countries served
- Email: sales@hnyzgroup.com
- +86 185 3894 3078
- Jiaozuo City, Henan Province, China
- Founded in 2005 · 300 employees
- Factory visits welcome: contact us to arrange
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