These low profile car park fans utilise high velocity air movement to create a low pressure airflow jet that entrains large volumes of surrounding air and quickly pushes smoke or exhaust gases to an extraction shaft without the need for any ducting, saving space and money.enquire now
Roof or duct mounted extraction fans use high speeds to discharge air, smoke and fumes from ventilation shafts. They are able to extract air at high velocity, forcing it away from the building and its roof level, and therefore allow ventilation from interior areas of the building where shaft airflow may not be optimal.enquire now
Similar in function to induction fans and originally conceived for tunnel ventilation, impulse fans use the same high velocity air flow principle to create a low pressure jet that 'entrains' surrounding air/gas/smoke/fumes to move large volumes quickly and efficiently without ducting.enquire now
Smoke curtains allow open areas (atria, auditoriums, lobbies, escalators, lobbies and foyers etc) to be isolated preventing the spread of smoke and heat during a fire. They are flexible, retractable smoke curtains approved to span "unlimited" widths, and heights up to 9m (29ft).enquire now
Subterranean structures, car parks and building cores can often lack any practical natural airflow options and therefore an alternative solution is required. Likewise, head of shaft airflow may lack sufficient draw to operate for smoke/heat evacuation ventilation systems (SHEV). In both cases the answer is to deploy mechanical ventilation systems to get airflow moving where you need it in the required volumes.
Induction fans are ideally suited to car park ventilation. Air is blown at high speed in a narrow channel creating low pressure jet which then draws in the surrounding higher pressure air to fill the space of the 'low pressure jet'. The faster the velocity of air the lower the pressure that will be generated. Therefore, the speed of airflow these fans can generate in their 'jet' gives them the ability to move a disproportionally large volume of air, smoke or fumes in the required direction (towards an extraction shaft).
The main advantages of using these fans are space and cost, because no ducting is required. Thus ceiling heights do not have to be specified to accommodate it, saving cost on equipment and installation and more importantly allowing a greater volume of an car park to be used for parking vehicles.
EN 12101-3 specification for powered SHEV systems has the following classes with temperatures and minimum functioning times:-
|Class||Temp(°C)||Min. period (Mins)|
We offer a range of induction fans, impulse fans and extraction fans each certified to EN 12101-3 classifications and we will be able to advise you which fan is best suited for your needs within the context of the SHEV systems, applications and specifics of your project.
We provide smoke curtains for a variety of applications including large atria, lobbies, foyers, auditoriums, theatres and halls. We also supply specialist smoke curtains for escalators and spiral stair cases. Smoke curtains will often be deployed in conjunction with roof mounted extraction fans.
Mechanical smoke shafts have higher installation costs than natural ventilation smoke shafts (NSHEV). However, they do save considerable floor plan space, and in higher multi-storey building this can equate to significant savings in available space which may make influence design and commercial considerations.
Mechanical - 0.6m2 - A mechanical smoke shaft can be as little as 0.6m2 in plan area. Whilst the cost of installation is significant, as the height of a building increases, so does the commercial return from utilising the on-plan area that an BRE or standard smoke shaft might occupy.
Approved Document B - 1.5m2 - Building Regulations Approved Document B (ADB) 2006 says that where natural ventilation is used, a minimum on-plan area of 1.5m2 must be available in the smoke shafts, with minimum dimensions of 0.85m in either direction.
BRE 79204 shaft - 3m2 - The BRE79204 shaft recommended approach which is based on BS 5588 Part 5: 2004 has an on plan area of 3m2 for the shaft area for smoke shafts for fire fighting stair shafts and lobbies on buildings over 18m.