Outlines a 'healthy house' design for suburban Australia. The design incorporated a tight building envelope and a ducted mechanical ventilation (and heat recovery) system, providing a minimum ventilation rate of 0.35 air changes per hour. Partial filtration and dehumidification of the air was also included. Low-VOC building materials were chosen. Total volatile organic compound (TVOC) concentrations were approximately 4,000 microgrammes per m3 just after construction, decreasing by a double-exponential model to 300 microgrammes per m3 by eight months, which is good.
Part 1 of this feature discussed the particular moisture and air quality related problems of midrise housing, and took a close look at two cases. This article analyses issues unique to 'Veterans Era Housing' (US housing built for World War II veterans during the 40s and 50s) and presents three cases where moisture problems were successfully addressed.
The symposium aimed to address the merits and drawbacks of various requirements for residential ventilation along with the problems encountered in implementing these requirements. Discusses proposed and existing ventilation standards and codes in the United States and Canada. Presentations included investigations of site-built as well as manufactured homes and highlighted issues relating to implementation, IAQ, energy, moisture and economics. Also discusses the advantages and disadvantages of requiring mechanical ventilation in residences.
The Hong Kong Environmental Protection Department has recently launched a set of guidance notes on indoor air quality (IAQ) management for offices and public places. An IAQ Certification Programme will be conducted on a self-regulatory basis that is intended to divide IAQ in mechanically ventilated buildings into three classes. Due to the large number of buildings in Hong Kong and the associated cost implications, a simplified, operationally feasible and scientifically sound assessment has been developed.
The heating, ventilating and air conditioning (HVAC) systems are a vital part of every home. These mechanical systems help control the indoor conditions you need for comfort, health and safety. How these mechanical systems interact with other appliances is critical in keeping your home's indoor environment healthy and safe.
A novel ventilation system has been installed in buildings constructed for the New Campus of the University of Nottingham. Super-efficient mechanical ventilation has been used as part of an integrated environmental strategy and operates with fan input powers below 0.5 W. l-1. s-1 of airflow. The complete plant was assembled from innovative low-pressure components and has exceptional performance. A key element of the design is that components of the system are bypassed when not in use. At the heart of the system is a low-velocity, high efficiency thermal wheel.