A newly revised filtration standard from ASHRAE combines two standards aimed at improving the technical accuracy of filter testing. The new standard addresses three air-cleaner performance characteristics of importance to users: the ability of the device to remove particles from the airstream, the total dust holding capacity with arrestance (weight efficiency), and its resistance to airflow.
ASHRAE publishes revised filtration standard, combines Standard 52.1 and 52.2
Tariffs on steel, aluminum, and other materials swell budgets.
Intl. Code Council and Modular Building Institute combine forces.
Pedestrian-friendly “Slow Streets” pilot starts on Earth Day 2019.
Transparent wood, self-cooling walls, bricks that filter air pollutants among the technological breakthroug...
Variations include laboratory test method for determining rate of air leakage.
Even if power goes green, transportation will still be a major emissions source.
Developer prompts new rules to use rainwater for heating and air conditioning.
Regulation would mandate signs warning that buildings could be unsafe during earthquakes.
State also repeals business furniture flammability standard.
Penalties total $2.7 million.