Archives: Blogs

Fans aren’t very effective at ventilating without moving propellers, but what is the best option for your application? At Eldridge, we prefer to use direct drive fans for most general ventilation applications based on selling thousands of fans in our 73 years of existence.   In this article, I will compare direct and belt drive …

Comparison Between Direct and Belt Drive Fans Read More »

One of Eldridge’s long-time OEM customers needed to modify the design of an existing trailer turbine package to instead use a heavy gas fuel source. The customer needed our assistance in designing an external enclosure exhaust system that would evacuate any fugitive emissions from the heavy gas fuel supply.  In undertaking this project, we faced …

Heavy Gas Fan Skid Read More »

Previously, in part one of this series regarding Air Density Impacts on Fan Performance, we determined how changes in humidity, temperature, and altitude can affect air density.  We will conclude this two-part series by discussing the effects on fan performance caused by changes in air density. Effects on Performance Let’s create a very simple ventilation system …

Air Density Impacts on Fan Performance Part Two: The Effect on Performance Read More »

At Eldridge, we use ASHRAE Standard Air Conditions to rate the performance of our Eldridge Fans.  Standard Air has a density of .075 pounds per cubic foot at the conditions of 70º Fahrenheit, sea level barometric pressure of 29.92 inches of mercury, and 0% relative humidity.  But what if my customer’s location is not at …

Air Density Impacts on Fan Performance Part One: What Affects Air Density? Read More »

The design and equipment selection of a simple general building ventilation system design can be done with a high degree of accuracy using spreadsheet calculations.  However, for more critical air flow systems, such as a wind tunnel, electric motor cooling system or a multi-unit diesel motor room, the level of precision required to get the …

Modeling Critical Air Flow Systems Read More »

When selecting fans for a customer’s application, we often hear, “Don’t select noisy fans.”  What the customer really means to say is “don’t make my shop floor noise problem any worse than it is.”   Improving our customer’s work environment by adding cooling air flow wouldn’t be value added if everyone is now required to …

Adding Fans to a Noisy Environment Read More »

Our first E-Hive Hood was installed around a year ago as part of an Eldridge designed gas pipeline compressor station ventilation system.  They were installed as part of a gas pipeline compressor station ventilation system Eldridge designed.   Our E-Hive Hoods were a key component in providing adequate air flow for the building while also …

E-Hive Hood Success Story Read More »

Life safety dampers are critical parts of a ventilation system necessary to protect people and equipment when a disaster occurs.  In normal operating conditions, these dampers allow air to flow through the ventilation system with minimal interference.  However, when something catastrophic occurs, they close to prevent shock waves, smoke or heat from traveling to other …

Life Safety Dampers Read More »

A good customer of Eldridge’s called to ask if we could help with in solving a humidity problem they were experiencing in their Texas ice cream plant.  In a second story room, containers of ice cream product came out of the blast freezer and onto a robotic palletizing machine.  Once the product was placed on …

Solving a Humidity Problem Read More »