Energy reduction strategies for existing buildings

Considering the current Global economical crisis, it is understood that "People are renovating than building new". This is the correct time to focus on reducing energy consumption in existing building to save money and reduce carbon emissions.
Existing building present greater challenges, they offer us a greater opportunity to significantly impact our overall national energy demand,reduce our dependence upon oil and gas and minimise our carbon footprint.

Strategies of energy reduction:

• Reduce building footprint.
• Reflective white roof.
• Daylight harvesting.
• Maintaining light density of 0.8w/sqft.
• Using energy recovery units.
• Variable volume ventilation systems.
• A High-Albedo roof that reduces heat absorption.
• Water efficient landscaping.
• Water efficient fixtures within building.
• Increase wall and roof insulation.
• Efficient glazing, extensive day lighting, lighting sensors and occupancy sensors.
• CO2 & CO sensor with controls.
• Waste water usage reduction using waterless urinals and bathroom sinks with automatic shut-off.