In general, design considerations for warehouses in hot countries differ little from those anywhere else in the world. However, there are one or two differences that can sometimes be overlooked, especially by companies operating out of older premises, or those expanding operations into a new market in a hot country.
For example, while not unique to any one country, issues such as heat and high humidity must be allowed for in many aspects of supply chain operation in a hot country (like Thailand, for example) — warehouse design included.
Of course, much depends upon where your warehouses are situated, but certainly in and around cities like Bangkok and along the coast, where the majority of industrial sites are to be found, heat and humidity can have quite an impact on workforce efficiency and productivity.
Warehouse Ventilation System Design: How Climate Control Improves Efficiency
Climate control can be challenging in warehouses, given their typical metal construction and large doorways. While it is possible to install air conditioning, the necessary systems are complex and very expensive to run.
Cost is often cited as a reason for neglecting climate control, but there is a good reason why, in Thailand, warehouse design should take into account the difference high temperatures can make to employee efficiency and productivity.
If your warehouse operatives have to labour under tropical temperatures, magnified by the metal structure of the building, they are not going to work with the same efficiency as they would in a cooler environment.
Strategically placed supply fans can bring cool air into the facility from the sides, whilst exhaust fans remove warm air from the ceiling, thereby enhancing temperature and humidity control within the space.
Why Warehouse Ventilation is Key
Warehouse ventilation is key to a safe, healthy, and productive working environment. Ventilation is about managing airflow to control temperature, humidity, and indoor air quality. By ventilating properly, you can remove airborne contaminants like dust, pollen, and volatile organic compounds (VOCs).
What this does is stop the build-up of bad smells and fumes, and also reduce the risk of mould growth and product degradation. In the end, it is all about the quality of the goods stored and the comfort of the employees.
Designing a Ventilation System
Designing a ventilation system requires a bespoke approach that takes into account the size and layout of the warehouse and the type of goods stored. A good system should provide enough fresh air, remove indoor air contaminants, and maintain temperature and humidity levels.
A mechanical makeup air system can be particularly useful as it brings in fresh air and balances the exhaust and makeup air rates. The system should also be designed to use minimal energy and optimise airflow and layout to create a comfortable and efficient warehouse.
Ventilation System Parts
A warehouse ventilation system consists of several parts, each playing its part in controlling the environment. Exhaust fans remove stale air and indoor air contaminants; supply fans bring in fresh air and distribute it around the warehouse. Ducts and vents direct the airflow so that fresh air reaches all areas of the warehouse.
Air control devices, such as louvres and dampers, balance the airflow and pressure. All these parts work together to create a well-functioning warehouse ventilation system and a healthy working environment.
Airflow and Layout
Airflow and layout are key to a well-ventilated warehouse. The layout should be designed to promote airflow and reduce stagnation, so that fresh air circulates around the space. Exhaust fans should be placed to remove indoor air contaminants, and supply fans to bring in fresh air and distribute it evenly.
Air control devices such as louvres and dampers can be used to balance airflow and pressure. The system should also be designed to use minimal energy and optimise temperature control to create a comfortable and efficient warehouse.
When Aircon isn’t an Option: Consider a Mechanical Makeup Air System
Retrofitting and running an air-conditioning system in an older warehouse might be cost-prohibitive, but the installation of fans in the roof space, along with a layer of insulation inside the walls, will go a long way towards improving employee comfort. Additionally, placing exhaust fans to remove warm air accumulating at the ceiling can significantly improve temperature control and air circulation throughout the facility.
If your company is planning to build or occupy a new warehouse, then of course it is far easier to put climate control measures in place before the operation goes live.
Either way, for warehouses in hot countries like Thailand that house largely manual operations, adding some form of climate control will make a marked difference to productivity. If air conditioning is out of the question, you might want to consider installing a type of fan specially designed for industrial buildings and warehouses.
These are known as HVLS (high volume, low speed) fans, and are probably the next best thing to air conditioning. They are also considerably less expensive, both to install and to run.
The Benefits of HVLS Fans for Hot Warehouse Ventilation System Operations
Ceiling-mounted HVLS fans work differently to conventional fans. They move a huge volume of air, effectively de-stratifying the layers of stale, warm air that build up in a warehouse space. HVLS fans can also help exhaust stagnant air, improving indoor air quality and comfort.
If you want to ensure your warehouse stays cool, these efficient and economical fans can be allowed to run 24/7 and will actually reduce air temperature by up to three or four degrees Celsius, whereas conventional fans succeed only in moving warm blocks of air around.
Three degrees might not sound like a lot, but it is enough to make people feel a lot more comfortable at work, especially as the air in the warehouse is moving as long as the fans are running.
Other Ways to Keep the Warehouse Cool with Proper Ventilation
HVLS fans are not the only new or retrofit feature you can add to your warehouse design for climate control. For example, if you can build a warehouse (or redesign it) with doors to the north and the south, keeping them open during warehouse operations will help to create a natural flow of air through the building.
Introducing fresh outdoor air is crucial to maintaining indoor air quality and preventing negative pressure conditions, which can affect airflow and the overall ventilation system’s effectiveness.
Of course, if you have the budget, the best way of all to prevent heat and humidity from reducing staff efficiency and productivity is to automate as much of your warehouse activity as possible.
With the cost of automation continuing to decrease, expect to see an increasing number of warehouse operators reducing manual processes over the next few years, as not only will this reduce the need to worry about productivity, but it will also minimise the cost of labour, heating, cooling, and lighting inside inventory storage facilities.
When your company is looking for (or building) a new warehouse in a hot country, it is important to keep automation in mind. Even if you are not planning to automate right now, it is worth considering the future possibility of doing so and allowing for that in the design of the building.
There’s Much to Consider in Warehouse Design for Indoor Air Quality
It is really no surprise that issues like heat and humidity get overlooked when designing warehouses. After all, there is always so much to consider, and with the emphasis always on making space for inventory and offices, interior comfort in the warehouse itself is at risk of taking a back seat.
An HVAC system can significantly impact energy consumption and indoor air quality. Balancing the ventilation system with HVAC capabilities is crucial for maintaining a comfortable and efficient warehouse environment.
That is why it can be helpful to engage some external help when designing, redesigning, or searching for a new warehouse in a hot country.
Our warehouse designers at Logistics Bureau know plenty about designing warehouses for optimal efficiency, and that includes getting the most from the workforce. Perhaps we can help you with your next warehouse-commissioning project. If you would like to speak with one of our experts in warehouse design and operation, do not hesitate to give us a call on +66 2207 2680.
