Energy efficient ventilation system
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Transcript of Energy efficient ventilation system
Intermittent extract &
background ventilators
• Classic method of ventilation
• Local extract fans are installed for rapid extraction purpose
• Suitable to be used in houses, flats and apartments
• Difficult to apply to single dwelling with single facade
Benefits of Intermittent extract & background ventilators
• Provide rapid extraction of moisture
• Fans can be mounted in window, ceiling or external wall
• Can operate either occupant or automatic control
Possible problem
•High running cost
•Noise potential if it is poorly installed
•Might require additional background ventilators fitted at low level
Whole House Ventilation with
Heat Recovery (MVHR)
• Comprises a Heat Recovery Unit and a network of ducting
• Located in the loft space of a house / utility room in an apartment
• Works by using both supply and extract ventilation
• Proven as a low energy & highly efficient way of ventilating
Concept/ Application of MVHR system
• It works by continuously extracting air from the wet rooms
• At the same time, drawing in fresh supply air from outside
• Warm, extracted air is passed through the heat exchanger before being ducted outside to the atmosphere
• Fresh, filtered & tempered air is then supplied into living rooms,dining areas & bedrooms
Benefits of MVHR system
•Year round removal of condensation and indoor
pollutants
•Helping reduce carbon footprint of the property
•Fresh, filtered air supplied to dwelling, ideal for allergy
sufferers
•Saves energy costs
•Very low noise levels
•Compact, light weight and easy to install
•Fits into nearly any wall depth and orientation
Possible problems to MHVR system
• In cold climates, very cold air brought into a heat recovery system can cause frost formation in heat exchanger.
• Due to frost build up reduces ventilation effectiveness and can damage the heat exchanger, heat-recovery systems must have devices to deal with frost.
Future Recommendations
Case Study - One City Sky Park
• Located in USJ 25
• Designed to be both contemporary and sustainably environment friendly
• Since the completion of One City Sky Park, the development has received
the Green Building Index Provision Silver certificate. A key green feature is
its use of natural light to lit the interiors of Sky Park
GBI Certification Proof
Passive Design Features
1. Vertical green wall that cover the wind channels
• Hanging greenery such as vines or
creepers with Stainless Steel Wire
Trellis System
• Protect exterior finishes and masonry
from UV radiation and rain
• Increase the seal or air tightness of
doors, windows, and cladding by
decreasing the effect of wind pressure
• Lower the air temperature around
intake valves
2. Water Features
•Provide a peaceful backdrop to
occupants
•Purifying and humidifying the air
around
•Generate beneficial negative
ions into the environment
3. Wind Channels
• Daylighting
• Allow cross ventilation
and stack effect
ventilation
4. Glass panel walk path as means of natural lighting
• Made up of double layer heavy duty tempered glass
• Prevent the heat from entering the space
• Allow sufficient daylight