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7/12/2014 What is VRV and is it better than mutliple units? Pro's and Con's explained | Emax Industries
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Technical Help › What is VRV and is it better than mutliple units? Pro’s and
Con’s explained
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What is VRV and is it better than
mutliple units? Pro’s and Con’s
explainedApril 25, 2014 by Troy Schulz | Categories: Technical Help, Uncategorized |
Tags: ac, aircon, airconditioning, emax industries, VRF, VRV
VRV or multpile units?In a larger home or commercial building when renewing or installing a
new system, it should be considered if a multiple systems or a VRV
system is utilised. To properly evaluate a VRV ( or VRF) system it
should well understood how they differ from a standard units These
differences and features include;
VRV systems are divided into 1) Heat pump and 2) Heat recovery
types of systems
Heat recovery systems include extra refrigeration pipework to allow
energy to be moved from one indoor unit to another indoor when
one is cooling and the other heating, while then rejecting or
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7/12/2014 What is VRV and is it better than mutliple units? Pro's and Con's explained | Emax Industries
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absorbing excess energy outside the building
Heat pump can only absorb or reject energy moving it from inside
or outside the building.
A VRV ( variable refrigernat volume) system has multiple indoor
units connected to a single or common bank of outdoor units. The
advantage of this system is that the total system refrigernat flow is
modulated to only what is required. A further advantage is that the
amount of plant outside of the building is reduced . ie 4 standard
ducted split systems would have 4 outdoor untis outside where as a
VRV system could have 4 indoor units and just 1 outdoor unit.
The advantages of multiple units include;
Lower cost up until 5 or 6 units are on site
If a system fails it is only one area and not the whole site
Replacement of the system in 10 years time can be done in a
staggered fashion
The disadvantages of multiple units include;
A larger amount of outdoor real estate is required which is ok if a
flat roof area is easily used but otherwise a number of area’s will be
affected
Energy inefficiency compared to VRV/VRF technology
The Advantages of a VRV/VRF Systeminclude;
Higher levels of efficiency are able to be acheived
Less area is used to reject / absorb heat from outside the building.
If external plant area is limited or a condenser water system is used
VRV / VRF may be the only solution
These systems are able to have distances over 30 metres between
indoor and outdoor units whereas single units are restricted
The disadvantages of VRV / VRF;
Initial Cost of installation is higher
A system wide failure can disrupt the whole system. These systems
are reliable and engineered to a high standard
In summary the VRV / VRF is a more efficient, higher quality system
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7/12/2014 What is VRV and is it better than mutliple units? Pro's and Con's explained | Emax Industries
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VRV Branch selector box and pipew ork
but is more expensive to install upfront. It can be the only choise when
a large distance exists between the indoor and out units or when the
available real estate will not accomodate 5 units taking up 25sqm
rather than 6 sqm. Given the technical variables it is best to speak to
a professional trustworthy Mechanical contractor to assess the viable
otptions. Emax Industries can help , just click here for further
information.
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7/12/2014 What is VRV and is it better than mutliple units? Pro's and Con's explained | Emax Industries
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Pipew ork connecting multiple VRV outdoor units
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