Further on site research (rather than experiment conducted in controlled environment chamber or simulation work) is required to measure the actual performance of DV with AHU in heating mode and assess the impact of a perimeter heating system
on the performance of a DV system.
For example, a very low U-factor envelope system may not require a perimeter heating system
, and very tight, highly insulated homes have been built in Northern Europe that do not require central heating systems.
A new 115 PSI high pressure steam system was installed that could be stepped down to provide 15 PSI lower pressure for use with sterilizers and the building's perimeter heating system
A hot-water perimeter heating system
was also added to replace the original steam radiator system.
Further on site research is required to measure the performance of DV in heating mode and assess the impact of a perimeter heating system
on the performance of a displacement ventilation system in heating mode.
The building also has a perimeter heating system
," says Tony Musumeci, PE, principal at EMTEC Consultants Inc., Ronkonkoma, NY.
Typically a perimeter heating system
is required to offset the heat loss through the building envelope.
On the other hand, chilled beam systems have limited heating capacities and often require a separate perimeter heating system
. (5) This increases the total cost of the HVAC system.
The system was designed to override the perimeter heating system
It is quite common in Canada to have both a perimeter heating system
and an air-based HVAC system; however, the presence of two systems increases capital and operational costs.
As per standard office practice, the envelope insulation system exceeded code minimum; the spray-applied air barrier, and new high performance windows, created the proper conditions to allow the use of low-temperature perimeter heating systems
. The generous use of precast concrete panels overlaid with a brick cladding also provided a high performance, high mass, low life-cycle cost envelope system.