Suppliers of heating, venting and air-conditioning products have leant on metalforming technology to pump out products that perform at higher levels of energy efficiency. In this paper three recent successes are presented of the leaders in that field :TRANE, RHEEM and YORK companies .

A methodology for studying HVAC filter loading and subsequent microorganism removal is presented in this paper. First, the test facility used to challenge the filter media is discussed, then nine loading tests have been conducted , three for each of the three viruses, for the validation of the facility. Finally the results and conclusions are presented.

This paper focuses on the relations between ventiliation systems, indoor air quality and energy consumption. Several strategies are pointed out by which at the same level of energy consumption, the indoor air quality is improved or at the same level of indoor air quality, the energy consumption is reduced. Thus proper ventilation methods are important for the total energy efficiency of buildings.

For that study , an indoor contaminant behavior prediction method has been developed. The contaminant model has been integrated within the whole building simulation environment ESP-r, then validation studies were conducted. In this paper the authors insist on the importance to have a global look at contaminant behaviour, errors could occur if spatial and temporal temperature variations were not included in the prediction of contaminant levels.

Many of the dedicated outdoor air systems designed and installed today are suboptimal. The aim of this paper is to discuss the ways to optimize their design in order to lower both their installed cost and energy use.

In this paper the performance of a computer simulation code for modeling direct evaporative cooling by water spray vaporization is evaluated. A series of parametric explorations have demonstrated that the one-dimenstional model of spray (fluid dynamics and heat and mass transfer) is sufficiently consistent.

This paper sums up how to use CO2-Based DCV with standard 62.1-2004 from a theoretical standpoint. Changes to the way ventilation rates are calculated in the latest version of standard 62.1 require a modification to the way C02 concentration is used in DCV control system . A CO2-DCV approach for single zone systems is discussed in detail.

This paper advises the use of Standard 62 IAQ procedure to calculate the required outside air with air-cleaning systems to clean gasses, vapors and to improve the removal of particulates. That use allows a saving of energy, improves environment and makes easier the maintenance.

A high school of The Blue Valley School District located in Kansas city had a history of complaints about poor IAQ that was not conducive to learning. A study was carried out to provide a superior IAQ and to reduce annual utility costs. A new displacement ventilation system has replaced the traditional mixing one, a new boiler plant has created a higher seasonal efficiency. The results are quite satisfactory.

This paper describes the case of the Ecole du Tournant in the province of Quebec. This school is greenhouse gas free and is 80 % more energy efficient than a similar school built according to the Model National Energy Code for Building (MNECB). That result has been obtained thanks to an innovative design method, its envelope's quality, its high efficiency lighting systems, low-energy HVAC system and intelligent control system.L