Tag Archives: HVAC

Prescription for Energy Savings: Reducing cost and consumption with upgraded cooling tower fans

19297247_l copy

The average hospital uses three times the energy of typical commercial buildings, and U.S. medical facilities spend $8.8 billion annually on energy. Between lighting, medical equipment, HVAC, and plumbing, energy consumption in medical facilities outpaces any other type of building. For large hospital systems, annual costs can reach into the tens of millions of dollars—no small amount in an industry of thin margins.

Read More

Stay in Control: Specifying building automation systems for cost savings

The Sheraton Phoenix Downtown Hotel uses a BACnet (data
communication protocol for building automation and control
networks) compatible building automation system (BAS) for
energy savings and occupant comfort. All images courtesy Alerton

Building automation systems (BAS) have evolved rapidly over the past several decades, expanding beyond HVAC alone to monitoring and controlling numerous other building systems. This article explores the opportunities from implementing BAS in new construction and in building retrofits, the latest features and benefits available, and factors to consider when specifying BAS controllers, software, and wall sensors for commercial and institutional buildings.

Read More

Designing for Comfort & IAQ: Air distribution per ASHRAE 55 and 62.1

Photo © BigStockPhoto/Pavel Losevsky

The goal of a room air distribution system is to provide thermal comfort and a healthy living environment for occupants in the space. This article looks at designing such assemblies for comfort and indoor air quality (IAQ) per ASHRAE 55 and 62.1. It examines the common method of overhead distribution, but focuses on partially mixed (i.e. most under floor air distribution [UFAD]) and fully stratified (i.e. displacement ventilation) systems.

Read More

Duct construction app

The Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) has released an app for the third edition of its manual, HVAC Duct Construction Standard—Metal and Flexible. The app provides a simplified process for finding construction options for rectangular ducts with dimensions up to 3048 mm (120 in.) for applications discussed in the manual. It provides options for internal and external reinforcements. Internal options are limited to electrical metallic tubing (EMT) conduit tie rods, and …

Read More