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Underfloor Air Conditioning System

Friendly to both humans and the environment. Underfloor air conditioning system to make your office space more comfortable.

Entire floor blowing type (FSB500CAW)

Blowing outlet type (FSB500SPW)

We are now entering a stage where office space oriented toward functionality, in line with the development of office automation, must also incorporate a comfortable or sophisticated design. With this in mind, Hitachi Metals Techno, Ltd. focused on utilizing under floor space, which has been secured for the wiring so far, to air conditioning. After its research and development and repeated improvements as a leading raised floor manufacturer, it announced the launch of "Under floor air conditioning system" which transfer mild airflow from raised floor.

Air Conditioning from the Floor Changes Offices

Challenges for the office environment

There is an increased need for air conditioning within office spaces, given the growing number of office automation devices reflecting advances in IT, and the consequent increase in heating value. There have also been annoying issues such as irregularities in sensible temperature, the direction or amount of airflow and environmental deterioration, including dust or noise etc. However, the "under floor systems" provided by Hitachi Metals Techno, Ltd. resolve such problems at a stroke. The heat, dust or odors etc. are effectively removed by a one-way piston airflow, which eliminates hot and polluted air upward to the ceiling by blowing wind generated by air conditioners from the floor. In addition, the air provided has a uniform and mild feeling, also contributing to energy saving, due to the low temperature or airflow setting, thanks to the wind from the floor, which can act directly on the living area, unlike conventional air conditioning systems which affect the entire room. The ability to change the layout, which is also one of the merits of free raised floors, allows the creation of comfortable personal space, which meets personal needs and eliminates restrictions based on the location of blowing outlets, and those affecting free living space, including the need to make space for ceiling ducts

Comparison of Ceiling Blowing and Floor Blowing Air Conditioners

Item		Ceiling blowing air conditioner	Floor blowing air conditioner	Merits and demerits of floor blowing air conditioner
Air quality at living space	Ventilation efficiency	△	○	High air ventilation efficiency because no air is mixed in the living area
Feeling of comfort	Feeling of draft	△	○	Mild airflow with low wind velocity and small blowing air temperature difference
	Noise	△	○	Low noise due to low blowing air velocity
	Personalizing	△	○	Easy installation of personal blowing outlets (flexible application for partitions and desks is possible.)
Increased number of office automation devices	Increased heating value	△	○	Smooth elimination of waste heat via bottom-up airflow
Layout change	Blowing outlet transfer	×	○	In the case of the blowing outlet type, easy transfer is possible. In the case of the entire floor blowing type, no longer any need to study the blowing outlet transfer.
Use of the under floor space	Elimination of ceiling ducts	×	△	A patentable design is possible because of the lack of ceiling blowing outlets. You need to pay attention to the under floor heat insulation and air sealing.
Maintenance	Labor-saving	△	○	Eliminates the need for maintenance operations within the ceiling.

The "Pressurized Chamber Method" to Significantly Contribute to Cost Cutting

Floor blowing air air conditioners using the pressurized chamber method need only around one thirtieth of the blowing velocity power and up to around one fifth that for the blowing air temperature in comparison with conventional ceiling blowing units.
This contributes not only to the realization of significant energy saving, but also to resolving environmental issues such as waste heat from air conditioning, which has become serious in recent years. As for the cost, it is very economical because of its cheap initial costs - thanks to the limited equipment required and reduced running costs, ceiling maintenance is no longer necessary.

"Perforated Type" and "Blowing Outlet Type"
The High Load-Carrying Capacity enables under Floor Air Conditioning.

The "entire floor blowing type" achieves a open ratio of 17.3 percent, which is the maximum value for steel office automation floors. Its combination with a breathable carpet provides uniform and effective air conditioning. In addition to the high static and dynamic load-carrying capacity, it never gives the uncomfortable feeling that comes from floor-based air conditioning, thanks to the adoption of small oval hole shapes (design patent pending), which are imperceptible to those walking.

The "blowing outlet type" can be used for various blowing outlets thanks to its varying round hole diameters. Moreover, its high load-carrying capacity helps achieve a more flexible layout, while the mortar injection type also enhances the walking feeling. Both types are next-generation floor systems, based on technologies acquired through free raised floors and subsequently evolving.

Underfloor Air Conditioning System

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