How often should
HVAC ducts be cleaned?
How often should Kitchen exhaust be cleaned?
How
often should I have my ducts cleaned?
There is no set time
frame for duct cleaning, Varying factors determine the accumulation
of contaminants within you system. These include:
- Usage
- hours of use i.e 7 days x 24 hrs.
- System
maintenance - Filter condition, duct leakages, door/window
leakages
- Dust sources
- Floor covering type, number of people, air movement
- System
design - adequate ventilation for photocopiers, cutting
machines, smoking, fresh air intake location, etc
But
as a rule of thumb:
| System |
Commercial
/ Industrial |
| Supply ducts |
On
inspection |
| Return ducts |
1 yr |
| Coils |
1 yr |
| Ventilation systems |
2 yrs |
| Sanitisation |
1 yr |
| Filters |
1 yr |
Domestic
- Evaporator coil - 12 months
- Homes with occupants
susceptible to allergies.
- Homes with
indoor air quality concerns.
How
often should kitchen exhausts be cleaned?
The are many factors
to determine the frequency of kitchen exhaust duct cleaning. Some
of these are:
- Type of cooking
proccess. ie steaming or deep frying.
- Usage per day.
- Type of oil being used.
- Grease filter maintenance.
- Amount of Air flow.
- Ambient temperature.
An inspection of the exhaust hood,
filters and behind the filters will give you an
indication.
But as a rule of thumb:
| Usage |
Hours
Per Day |
Cleaning
Frequency |
| Heavy
Use |
12-16 |
3 Monthly |
| Moderate
Use |
6-12 |
6 Monthly |
| Light
Use |
2-6 |
Annually |
How
often should evaporator coils be cleaned?
Due to the environment
that is created on and around the evaporator coil it
is necessary to clean and
santise at least every 12 months. This ensures there is no build
up of contaminates causing air flow restrictions and there are
no bacteria, fungi or mould growth.
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