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| Question |
Are evaporative coolers good for your health? |
| Answer: |
They are very
good for your health. They clean the air, they use 100%
fresh air, they do not dry the air out like refrigerated
machines, they maintain a very healthy level of moisture
which is good, not only for people, but also for furniture,
flowers, books etc., and..... they do not create static
electricity in the floor coverings.
Many asthma sufferers get great relief by using evaporative
air coolers. |
|
| Question |
Does
it increase the humidity? |
| Answer: |
Yes, the humidity
will increase slightly, but it will not be evident unless
you close the room up.
The room must never be closed up - leave it open to enjoy
the fresh cool air, and you will never notice the small
increase in humidity.
Increased humidity is beneficial - firstly, at low temperatures,
humidity increases the feeling of coolness and secondly,
a very dry atmosphere causes distress, overworking the
humidifying action of the nasal passages and humidity
will solve these concerns. |
|
| Question |
How do you fill it with water? |
| Answer: |
The installed
coolers are connected permanently to the water supply
and a float valve controls the water level. |
|
| Question |
How does an evaporative air cooler work? |
| Answer: |
A pump circulates
water from a reservoir into a Celdek filter pad so that
it becomes saturated with water. A fan draws warm air
from outside and forces it through the wet pad. As the
air passes through the pad it gets cooled by evaporation.
The objective is to achieve as much cooling as possible,
and Brivis have the highest cooling performance of any
such air cooler in the world. |
|
| Question |
How much maintenance does it need? |
| Answer: |
Very little.
Depending on the degree of pollution in the environment
(mainly dust and dirt) you will only need to clean the
water reservoir at the end of each season, more often
in very dirty areas. The special 100mm Celdek Filter Pad
will need cleaning too and eventually it will need to
be replaced - we recommend every 6 years, but many Filter
Pads last much longer. Just take the pads out and gently
hose them off. |
|
| Question |
How much water does an evaporative cooler use? |
| Answer: |
The amount
of water an evaporative cooler uses is dependant on the
evaporation rate of the coolers pads.
The more water the cooler can evaporate for a given condition
and airflow, the more cooling potential the cooler has.
The evaporation rate varies depending on the current weather
conditions, the size of the cooler, the speed of the coolers
fan or the velocity of the air through the pads, and the
condition and type of the filter pad material.
In addition to the cooler evaporating water, water is
also displaced to maintain the water quality within the
cooler so that the coolers pads and other components do
not deteriorate prematurely.
The water consumption is approximately:
AD15 - 17 litres per hour
AD25 - 17 litres per hour
AD35 - 26 litres per hour
AD45 - 33 litres per hour
AD55 - 44 litres per hour
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|
| Question |
How
much will it cost me to have the system installed? |
| Answer: |
An exact answer
is not possible without sizing and surveying your home.
Brivis can install, and a Brivis consultant will be happy
to recommend an approved installer in your area that will
help you.
A typical installation price per unit would cost around
R20,000 to R30,000, exclusive of VAT.but this is dependant
upon the type of unit chosen, duct work involved and complexity
of the installation. |
|
| Question |
How
much will it reduce the temperature? |
| Answer: |
That depends
on the temperature and humidity of the ambient air.
Referring to the “Evaporative air cooler supply temperature
chart (90% efficiency)” you will get the answer for specific
ambient conditions.
For example, at a temperature of 30°C and a humidity of
40% the air supply will be at ±20.4°C - a drop in temperature
of 9.6 degrees. |
|
| Question |
Some
of my outlets are not operating, ie hot air only blowing
out of some of my outlets, what could be causing this? |
| Answer: |
Some of the
ducts may have collapsed, or come apart.
If this problem has occurred, you should call Brivis and
we will be happy to arrange a service technician to carry
out the repairs.
Or, if the installation is out of warranty, call your
local plumber, or reconnect the ducts yourself with ducting
tape. |
|
| Question |
What
models are available? |
| Answer: |
Below is a
table of the Brivis models available, showing the volume
of air, motor size and operating weight for each model:
|
| Model |
Volume
(m³/hr) |
Volume
(cfm) |
Motor Size (Watts) |
Dry
Weight (kg) |
| AD15 |
8,500 |
4,999 |
315 |
42 |
| AD25 |
10,500 |
6,175 |
315 |
42 |
| AD35 |
12,500 |
7,351 |
750 |
42 |
| AD45 |
14,500 |
8,528 |
750 |
44 |
| AD55 |
16,500 |
9,704 |
750 |
44 |
Note:
All the above models are only available in down discharge
configurations.
All the above units are only available with Celdek 100mm
filter media
The correct model and number of units will be selected
based on your requirements and situation.
Whether you’re concerned about efficiency and reliability,
installation and maintenance, or the actual running cost,
our specialists at Brivis South Africa make it their business
to have all the answers. |
| Question |
What is the maximum recommended humidity? |
| Answer: |
For good results
we need a maximum relative humidity at the hottest part
of the day of about 60%. This will provide a temperature
reduction of about 5°C. |
|
| Question |
What is the power consumption? |
| Answer: |
It varies
from model to model, but in comparison with refrigerated
systems, evaporative air coolers use about one tenth of
the electrical energy, - so they are very inexpensive
to operate.
Approximately R0.40cents per running hour at full load
|
|
| Question |
Why
must the room be left open? |
| Answer: |
For best results,
always allow the air from the cooler to flow through the
room. This ensures that you get a constant supply of fresh
cool air and that the warm and stale air is pushed out.
|
|
| Question |
Will
the cooler work in high humidity areas? |
| Answer: |
Yes, but to
a lesser extent.
In high humidity conditions the amount of evaporation
is reduced. It is the evaporation that produces the cooling.
When evaporation occurs the water is dissolved into the
air as a vapour - you cannot see it, but it is there.
When the air has a high humidity it already has large
amounts of vapour, so we cannot dissolve much more water
and this reduces the amount of evaporation that can occur.
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