Project
MEP services in corridor ceiling .
The restaurant / lounge / reception area for the hotel , located on Level 2 , is served from a single chilled water air handling unit , and was designed as a variable air volume ( VAV ) system . The interior finishes in these spaces are of a high standard , and hence WSP selected linear VAV ceiling diffusers which were finished in matching colours ( mainly black ) as specified by the interior designer .
The kitchen serving the restaurant is open to view from the restaurant patrons , which again put emphasis on high class finishes and neat layouts . To this extent , the stainless steel extraction canopy had to be powder coated matt black to fit in with the overall colour theme of this space .
WSP
a floor area of approximately 30m 2 in terms of delivered cooling capacity . These units were pre-purchased by the client , and as part of the main contract works only the chilled water reticulation and fresh air supply ducts were installed , based on an estimated location layout of the FCU ’ s . Chilled water pipes terminate in isolating valves , and fresh air branch ducts in butterfly balancing dampers at each unit ‘ location ’.
The design intention is that , once a particular tenancy is let and actual internal furniture and partition layouts become available , the hydronic units are installed in their final positions and connected to the chilled water tails including a two way control valve . Supply air is via an internally insulated plenum box with three or four spigots from which flexible ducts can connect onto constant air volume ceiling diffusers .
Condensate drains are installed to the intended positions of the fan coil units , connected to riser stacks cast into the concrete columns .
RACA Journal | Benjamin Brits
Figure 3 : An example of a grey box installation drawing .
WSP
The extraction canopy in show kitchen is painted black , and pizza oven in copper .
OFFICES AND RETAIL BUILDINGS The development has three distinct buildings designated for offices and retail :
• Office block A comprising of 4 floors , total lettable space approximately 5 200m 2 .
• Office block C comprising of 4 floors , approximately 375m 2 retail space on ground level , and 2 320m 2 of lettable office space on the remaining three floors .
It was the client ’ s decision that the MEP services for these should be designed as a ‘ grey box ’ finish . In terms of the HVAC systems , it was decided to opt for smaller , low to medium static pressure hydronic fan coil units , each capable of covering
An example of the grey box installation at the site .
Offices B comprises of six offices , each with a ground floor plus a mezzanine level , all open to one common space . The client ’ s design intent for these offices was to create a bespoke , fully fitted out space , into which tenants could move in with minimal fit-out changes to the MEP services .
The HVAC design for each of these offices comprises of two hydronic fan coil units serving the ground floor , with units
RACA Journal | Benjamin Brits www . hvacronline . co . za RACA Journal I January 2022 39