Christopher Morin's Blog – August 2014 Archive (3)

Top 5 Changes to ACCA Manual S

      As I had brought up years ago, ACCA's Manual S was in dire need of an update.  Written in 1995, Manual S Residential Equipment Selection was passed by with huge technical and efficiency strides within the…

Continue

Added by Christopher Morin on August 27, 2014 at 5:30pm — 1 Comment

UPDATED: Big Changes for Duct Testing in MA

   If you have not been asked to complete a duct test by your local Massachusetts Inspector, it is just a matter of time before you are surprised by this stringent/updated code requirement.  Despite some push-back from Contractors  and Inspectors, all of MA is required to test new or altered duct systems.  All of MA adopted the 2012 International Energy…

Continue

Added by Christopher Morin on August 17, 2014 at 4:59pm — 9 Comments

No Bubbles, No Troubles!

Or is there? This saying is an old adage in our industry to let the technician know that the refirgerant charge is "all set". You see, there must be a steady stream of liquid to the metering device for it to function properly. For sake of conversation, let's use the TXV. In order for most TXV's to throttle and correctly maintain the desired Superheat, there must be a minimum of 2F of subcooled liquid at the valve (not where it is measured, near the condenser). If the liquid were to flash off… Continue

Added by Christopher Morin on August 12, 2014 at 1:19pm — No Comments

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Bud Poll replied to randy tolowski's discussion Another unvented roof question
"I've removed caulking that was over 30 years old and it outlasted the materials to which it…"
5 hours ago
Profile IconAmanda Hallock, Kalvis, Tyler Grubbs and 6 more joined Home Energy Pros
7 hours ago
Corbett Lunsford posted videos
8 hours ago
Sean Lintow Sr replied to randy tolowski's discussion Another unvented roof question
9 hours ago
randy tolowski posted discussions
10 hours ago
Todd Collins replied to Tom Strumolo's discussion Ancient (70's) wall foam insulation, now a powder.
"What did you find about the dust?  "
14 hours ago
Susan E. Buchan commented on Shawna Henderson's blog post Drainwater Heat Recovery Units & Water Efficiency
"Makes sense, Shawna. Thanks"
14 hours ago
Shawna Henderson commented on Shawna Henderson's blog post Drainwater Heat Recovery Units & Water Efficiency
"Susan, I'm not sure that insulation on the unit would be of great benefit, as the drainwater…"
14 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service