“As ASHRAE President Gordon V.R. Holness noted in the ASHRAE Journal, “Approximately 86% of building construction expenditures relate to renovation of existing buildings, not to new construction.” Holness estimated that “over the next 30 years about 150 billion sf of existing buildings (roughly half of the entire building stock in the United States) will need to be renovated.” Historically, new construction only adds about 2% annually to the U.S. commercial building stock, so the real opportunities for reducing operating costs must be found in building retrofit and renovation.” – Glumac Blog.
Buildings are the major source of global demand for energy and materials that produce by-product greenhouse gases (GHG). Slowing the growth rate of GHG emissions and then reversing it is the key to addressing climate change and keeping global average temperature below 2°C above pre-industrial levels.
To accomplish this, Architecture 2030 issued The 2030 Challenge asking the global architecture and building community to adopt the following targets:
- All new buildings, developments and major renovations shall be designed to meet a fossil fuel, GHG-emitting, energy consumption performance standard of 60% below the regional (or country) average/median for that building type.
- At a minimum, an equal amount of existing building area shall be renovated annually to meet a fossil fuel, GHG-emitting, energy consumption performance standard of 60% of the regional (or country) average for that building type.
- The fossil fuel reduction standard for all new buildings and major renovations shall be increased to:
- 70% in 2015
- 80% in 2020
- 90% in 2025
- Carbon-neutral in 2030 (using no fossil fuel GHG emitting energy to operate).
These targets may be accomplished by implementing innovative sustainable design strategies, generating on-site renewable power and/or purchasing (20% maximum) renewable energy.
Please visit Frequently Asked Questions section for more in-depth information on the 2030 Challenge.
*Note: This was stated in the January 2008 Edition of the ASHRAE Journal. When we polled permitting for Boston, we found 75% for construction in Existing Buildings. 25% New.