Christopher Morin's Blog – April 2012 Archive (3)

Energy Efficiency Ratio (EER)

Energy Efficiency Ratio, or EER, is a way to exhibit how well an air-conditioner is operating based on the power being used.  Most homeowners are of course familiar with SEER, the ratio across an entire season.  Since SEER is tested at a "partial load", the EER is a more realistic number to use when figuring energy savings.  AHRI tests their EER of residential air-conditioners using 400 CFM per ton of airflow at 95F Outdoors / 80F Indoors and 67F Wet Bulb.  This compared to the SEER testing…

Continue

Added by Christopher Morin on April 28, 2012 at 6:47pm — 6 Comments

Non-Condensables? Are you sure?

  Non-condensables in a residential split air-conditioner can be, for most technicians, a pandora's box to diagnose.  Fortunately, there is a simple process that can identify this condition without spending hours and hundreds of dollars in virgin refrigerant.  I think we all are aware that R-22 has hit an all time high, so getting this right is more important than ever - if you want to retain your customer.

  There are several ways air and/or water vapor can enter a sealed system. …

Continue

Added by Christopher Morin on April 15, 2012 at 11:30am — 2 Comments

New England; HRV or ERV?

I remember installing some early version residential Energy Recovery Ventilators (ERV) and discovering a potential freezing issue.  Also, if I used only a Heat Recovery Ventilator (HRV) than I would be drying the air during the Winter, and adding significant latent load in the summer.  So, which one do I choose?  The homes are tight enough these days to require mechanical ventilation, and I would much rather a balanced ventilation system that I can control.…

Continue

Added by Christopher Morin on April 9, 2012 at 10:30am — 2 Comments

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Derrick Koehn commented on Diane Chojnowski's group Facebook Pages
10 minutes ago
Derrick Koehn joined Diane Chojnowski's group
Thumbnail

Facebook Pages

Does your company or organization have a Facebook Page?This group is for pros who have facebook…See More
11 minutes ago
Derrick Koehn posted a video

Tips on Wood Preparation & Use - Heatmaster SS G-Series

A few tips to get the most energy out of your wood using an outdoor wood stove. http://www.pineviewwoodstoves.com http://www.heatmasterss.com
39 minutes ago
Paul Raymer posted a blog post

Zonal Pressure Puzzle

I have a wonderful little (16 x 14 x 8) test cabin at Bristol Community College in Fall River, MA. …See More
7 hours ago
Sarah Holloway posted a blog post

Play Game of Homes, by EnergyLogic, Inc.

I'd like to introduce everyone to Game of Homes, our cutting edge scenario based training tool…See More
9 hours ago
Nate Adams replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"Rob, I've bought, borrowed, or been given a number of different monitors. I had an Air Advice…"
12 hours ago
tedkidd replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"Yep, steep price but you will learn a lot. We are hoping these new devices that homeowners can own…"
13 hours ago
tedkidd replied to Luis Hernandez's discussion ERV Configuration
"We don't recommend ERV's anymore. If you are in a green grass climate ventilating…"
13 hours ago

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service