Energy Recovery Products

What's New in Energy Recovery Products Frequently Asked Questions

 

Greenheck energy recovery products provide fresh outdoor air to meet ASHRAE 62 ventilation rates, while recovering energy from the exhaust air stream. The benefits include improved indoor humidity levels, reduced energy costs and lower first cost for air conditioning (due to reduction in outdoor air load).

All product designs emphasize the market needs for low maintenance and economical first cost.

Psychometric Chart

A psychometric chart is a design tool to graph a building's HVAC thermodynamic air conditions and processes. Properties displayed on a chart include dry-bulb temperatures, wet-bulb temperatures, dew point temperatures, relative humidity, humidity ratio, specific volume, and enthalpy. A link is provided to a downloadable software program that allows the user to electronically plot conditions on a psychrometric chart. This program version permits the user to enter state points and graph the air conditioning process, while also calculating additional air properties.

Click here to download the psychrometric charting software.

Help Text for Standard Version of Psychrometric Chart

Project Profiles

Richmond County Schools wanted to replace a 1920 classroom building with a new, three-story junior high in Rockingham, NC. To simplify maintenance, the school district preferred to use an HVAC system in the new building similar to current systems on campus, but wanted to avoid indoor air quality issues other new schools in the area were experiencing.
Click here for the complete project profile.

The Yuma High School is one of the oldest schools in Arizona. It's buildings have undergone multiple renovations and additions. One might not typically expect mold problems to occur in the arid Arizona climate, but Yuma experiences "monsoon season." Over years, serious mold issues developed. Greenheck's model ERV helped solve mold issues. Click here for the complete project profile.

The Alexander Elementary School in Houston, TX project include five roof-mounted Greenheck ERVs. Four ERVs serve the classrooms and one met the needs of the gymnasium and cafeteria. Click here for the complete project profile.

DOAS & Humidity Control

The May 2008 issue of ASHRAE Journal feature an article on using dedicated outdoor air systems (DOAS) within the HVAC market as the primary means of moisture removal and how is has consistently gained a high market share worldwide. This is a great reference piece on DOAS & humidity control. Click here to download the complete article.

ARI Certification

To guarantee your customers are getting the performance they request, check for ARI Certification. ARI Certified products are tested for energy transfer effectiveness (sensible, latent, and total), cross leakage, and pressure drop. If a manufacturer states that their products are tested "in accordance with" ARI Standards that DOES NOT mean they are certified. To be certified, products must be tested by ARI and have annual check tests. Click here for a listing of ARI Certified Energy Recovery products. Download the Supplemental Directory.

AMCA and ETL Certifications

Greenheck's Energy Recovery products are AMCA Licensed for Air Performance and ETL Listed. Click on the links below for a listing of AMCA Licensed and ETL Listed products.
AMCA Licensed Products
ETL Listed Products

Downloadable Greenheck Literature
Viewable with the Adobe Acrobat Reader
(Click here for more information or to download the Acrobat reader)

Application Manual:

ERV Application Manual (423k)

Technical Information:

The Importance of ARI Certification (111k)

Specifications:

Wording for ARI Certified Wheels, Options, and Accessories