Al-Harbi Residence

Build-up Area

Riyadh – KSA
1 200 m2
Full MEP Design
Producing BOQ
HVAC System Design & Calculations
Full detailed AutoCAD Drawings
Full Equipments Schedules & Schematics
Full Technical Report
Private Client
Riyadh – KSA

                                  HVAC SYSTEM DESIGN CRITERIA

This project is a private residence, and our scope is to provide the design of heating, ventilation and air conditioning system for the project in addition to plumbing services.

A. HVAC systems will be designed in accordance with ASHRAE Systems and Equipment Handbook.

A. The air system will be direct expansion (DX) system, including split or packaged, refrigerant piping and ducting, and room air conditioning unit.
B. Return air will not be re-circulated for toilets, kitchens and other places where bad smell is generated.
C. Unit or duct-mounted heaters will be provided for all areas requiring heat.
D. Outside air intake must be sufficient to allow building spaces to meet the definition of acceptable indoor air quality.
E. Outside air intake will be sufficient to maintain a positive pressure inside the building, with doors and windows closed.
F. Ventilation air will be provided at a minimum of 10 L/s of outside air intake per person, or as specified in ASHRAE 62, whichever is greater.

                                  PUBLIC HEALTH ENGINEERING DESIGN
The plumbing design includes all plumbing inside and outside of the buildings up to the interface point with the existing utilities as available.

1. Domestic Water Supply
The water supply for this project will be taken by connecting to municipality main connection line via flow meter. Underground reinforced concrete tank located at the utility area will be used to collect the potable water. A truck-fill pipe point will be provided to fill the storage tank when necessary.
Hot water supply system shall be via centralized electrical hot water heater set. The capacity for set is based on the unit demand method.

2. Sanitary Sewer System
Sanitary sewer drainage will be based on the discharge unit method. Sewer system consisting of UPVC pipes is to be used, where all stacks shall be connected to manholes properly located on site.
Sewage lifting station shall be used to lift foul drainage from low portions of the building (mainly basement) and they will discharge to the manhole network.

3. Storm Drainage System
Storm water run-off will be based on storm intensity of 50mm per hour. Rain water pipes will be sized and laid at slopes of 1 % minimum.
The storm drainage system will consist of roof drains with internal leads; down-pipes will discharge over the surface where site grading will direct the discharge off site.

4. Irrigation System
The irrigation system will be designed based on the prevailing water demands of each plant. To conserve water and for effective watering of the planters, softscape-planting areas will be zoned; scheduling and sequence timing will control watering for each zone. Flow rates and pressure requirements will be generated by dedicated irrigation water pumps.

5. Fire Protection
Hand held multipurpose dry powder and carbon dioxide fire extinguishers would be provided to cover specific hazards and to provide primary fire protection through out.

6. Swimming pool and Fountains Systems
The swimming pool will be an overflow type. For water treatment a pool water recalculating pump, high rate sand filter, chlorine and acid dosing sets and ozone-generating unit will be provided. The system will include a surge tank, inlet fittings, vacuum fittings, main drain fittings and gutter drain fittings.
Water displays and fountains will have water pumps, nozzles, weirs and piping designed to achieve the necessary water effects desired by the Architects. Re-circulated water will be filtered and disinfected to maintain its good quality.
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