Q. What size dehumidifier do I need?

This depends on a range of factors including what you are trying to achieve, where you are, for how long etc.  Fortunately we specialise in selecting equipment for all applications and scenarios.  Get in contact with us to see how we can help with your project.

 

Q. What is the difference between Desiccant and Mechanical Dehumidification?

Desiccant dehumidification works by passing air through a rotating desiccant wheel to exact moisture from the air.  Desiccants such as silica gel naturally absorb moisture - that's why you'll find little packets of silica gel in new shoes or electronic goods.  As the wheel rotates, a small portion of the rotor is used to reactivate the wheel.  In this position the desiccant is heated so the moisture is released and it is then ducted out from the dehumidified space.

In comparison, mechanical dehumidifiers work in a similar way to a refrigerator.  They usually work by drawing moist air over a refrigerated coil with a fan.  The cold evaporator coil of the refrigeration device condenses the water, which is removed, and then the air is reheated by the condenser coil.  The now dehumidified, warm air is released into the room. 

 

Q. Should I use Desiccant  or Mechanical Dehumidification?

Both desiccant dehumidifiers and mechanical refrigeration systems can remove moisture from the air, so the question is - which type is best suited for a given application?  Both desiccant-based and refrigeration-based dehumidification systems work most efficiently when used together.  However, the general rule is that mechanical refrigeration is more efficient at higher temperatures (25-30 ˚C) and high moisture levels.  Desiccant-based systems are more economical than refrigeration systems at lower temperatures and lower moisture levels. Typically, a desiccant dehumidification system is utilized for applications below 55% RH down to 1% RH. 

We specialise in selecting the appropriate dehumidifier for your requirements.  Contact us to see what equipment will work best for you. 

 

Q. How long does the desiccant last for?  When does it need replacing?

The desiccant should be replaced every 10 to 15 years. The desiccant in our dehumidifiers has inbuilt reactivation. This means you do not need to constantly replace the silica gel in the equipment. 

 

Q. How often does equipment need to be serviced?

Servicing of your equipment largely depends on how often it is used and its surrounding conditions.  A good guideline would be a quick service every 3 months, where equipment is cleaned, filters are replaced and a more detailed service every 6 months. 

 

Q. How much does a dehumidification system cost?  

The short answer is that one size does not fit all.  For each project we engineer a customised solution to fit your requirements whilst keeping in mind customer budgets.

 

Q. Can I rent or trial a unit? 

Yes, we have a large range of rental dehumidifiers available that can be used to trial the technology.  This offers end user's peace of mind when deciding to invest in purchasing equipment. 

 

Q. How do I know if the Phase rotation is correct?

Run for a second and turn manual switch (located on the control panel in front of unit) off. Check phase rotation – make sure fan is rotating in the same direction as the arrow (located above process air inlet) – if not, Electrician is required to change phase rotation.

 

Q. Why do I need to check the filters and how do I do it?

Dirty filters can obstruct airflow and dramatically decrease airflow volume.  Depending on the environment, the filter may need changing every 1 - 2 weeks but it's best to check with consultant's recommendations.  Reusable filters are also available. 

 

Q. Auto or Manual Switch: What's the difference?

Sometimes it gets confusing when choosing which setting to switch the unit on with.  When renting, the units will generally be switched to the Manual setting.  The Auto setting is only used when air-control is required and the unit has the sensor attached and available.  Switching to Auto when there is no sensor present will not affect drying.

 

Q. Why is the unit overheating or not turning on?

When this happens, it could mean that the reactivation over temperature switch has tripped.  It generally happens because the unit was not turned off properly or the phase rotation is incorrect.  Contact our consultant to be referred to an engineer. 

 

Q. Why is the unit still running after I have turned it off?

Generally the technician should explain this as it is very important to know.  The reactivation heater has a reactivation over temperature switch which is triggered to switch off when the heater is overheating.  It is caused by the phase rotation being incorrect or the unit being incorrectly turned off.  The main power switch should only be turned off once the reactivation fan has stopped.  This can easily be fixed but always call the consultant as they can talk you through it.