| Advice for specifiers |
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The specifier for any air conditioning solution should consider a series of issues in a logical sequence:
Cooling only or heat pump system?
As the term suggests a simple cooling only split system can be used to provide indoor cooling. A heat pump system can be ‘reversed’ to provide indoor heating and cooling as required.
Heat recovery system?
A simple (2-pipe) heat pump Variable Refrigerant Flow (VRF) system supplies either cooling energy or heating energy at different flow rates to each indoor unit according to need. In a heat recovery (3-pipe) system inter-connecting pipe work allows simultaneous cooling of warm areas and heating of cool areas within the building with minimum energy demand at the outdoor compressor unit.
Right mix of units?
At Mitsubishi Heavy Industries we have probably the widest range of systems available to allow specification of the right type and size of system. This is especially the case in larger and more complex projects which may require eg VFR heat recovery systems for major open plan areas and specific split systems for computer rooms.
Energy efficiency?
At Mitsubishi Heavy Industries we claim to have industry leading energy efficiency across our entire portfolio of products.
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Other factors?
The specifier should consider unit size at the design stage. Even with larger VRF systems most MHI outdoor units are designed to occupy minimum footprint and even to fit into a standard lift for transporting on to the roof. The specifier should also consider noise levels of both indoor and outdoor units. MHI outdoor and indoor units incorporate several design details to ensure minimum noise levels in operation.
Design flexibility?
Once the appropriate location for outdoor units (eg outdoor wall or roof) is decided the specifier must consider the design of pipe runs. MHI VRF systems allow maximum design flexibility in terms of height difference between units and maximum pipe length - over ½ km.
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Fresh air ventilation?
The inclusion of the SAF energy recovery ventilation units in the building design will reduce the total amount of carbon emissions and will make a significant contribution with compliance with Building Regulations Part L2.
Controls?
While air conditioning systems continue to grow in capability and sophistication, getting the best out of the system by effective controls has been a bit of a black art. Mitsubishi Heavy Industries Air Conditioning division, believes that there is an optimum solution for each of the three system categories; standalone aircon control, web gateway control, and full BMS solutions. See the controls section.
Availability, acceptability and reliability?
MHI is an established market leader, product is readily available through a network of distributors, installers know that MHI kit is installer friendly and users report high levels of satisfaction with system reliability. |
