Be relaxed about building services design

Much of the complexity of designing, installing and maintaining central heating in multi-occupancy low-rise buildings can potentially now be eliminated.

Developments at Gilberts have created a room-by-room solution that is said to combine appropriate ventilation with heat boost.

The concept means that in effect, there is no need to provide radiators in the rooms in which the new option is fitted. Further, because the solution is fitted at ceiling height, it liberates interior design and optimises use of floor space.

The solution focuses around Gilberts’ unique Mistrale Fusion (MFS) unit with an integrated LPHW coil. Just 2 x standard MFS128 , or 1 x MFS256, will warm a standard 32 pupil-classroom to all regulatory requirements.

“The energy cost of running the unit for morning warm-up has been calculated at just £2.19/annum/room(*),” said Gilberts technical director, Roy Jones. “And there’s all the initial capital savings attained from the purchase and installation of a discreet internally mounted heating system, with no need for radiators with thermostats. MFS heating coils deliver a win-win strategy.”

The stand-alone unit is installed as normal through the building façade. The core MFS appliance provides natural ventilation and uniquely blends the incoming fresh air with the warmth from the exhaust air without the need for a heat exchanger. With the LPHW coil option, for morning warm-up, the coil is energised and the fan runs on full speed for approximately 20 minutes (depending on night set-back temperatures) to provide an even heat distribution across the room before occupancy. The integral fan is boosted to ensure the avoidance of stratification. With removal of radiators, as the heat is supplied at high level, the risk of expensive low surface temperature (LST) issues are also eliminated.

MFS ensures an even distribution of airflow, with control over temperature and CO2 levels within, and maintains a comfortable internal environment for occupants, attains air leakage better than legislative requirements- 5m3/HR/m2, and a U value of 1W/m2/°C. It is recognised as being fully compliant with Environmental Funding Agency, Facilities Output Specification and BB101 requirements for school ventilation.

(*) for a standard operating installation, in a typical 32 pupil classroom, assuming a ‘worst case’ scenario that every morning heating will be required with a six degree lift in internal temperature.