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…

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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…

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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.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

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Colin Genge posted events
5 hours ago
John Nicholas replied to Sean Lintow Sr's discussion Duct Testing - is a change in order? in the group Best Practices (Residential)
"Yes,  I was connected to the AH cabinet.  I find it easier in this area, given the common…"
7 hours ago
Colin Genge replied to Kim Tanner's discussion Blower Door Applications Guide in the group Multifamily Buildings
"This is a great guide that anyone testing with multiple fans should get hold  of. "
8 hours ago
Colin Genge added a discussion to the group Multifamily Buildings
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Just posted a lot of Multi-Family oriented blower door videos.

Just posted a lot of Multi-Family oriented blower door videos. Everything to do with Multi-Fan…See More
8 hours ago
Colin Genge joined Norm Bourassa's group
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Multifamily Buildings

For too long there has been relatively little EE focus on multifamily, but some new programs have…See More
8 hours ago
Colin Genge replied to Sean Lintow Sr's discussion Duct Testing - is a change in order? in the group Best Practices (Residential)
"I would assume you tested that high air leakage from the equipment cabinet and not on a flex…"
8 hours ago
Colin Genge replied to Sean Lintow Sr's discussion Blower Doors & Methods Used in the group Best Practices (Residential)
"For those of you who need  a Tectite report, FanTestic's report Generator is powerful…"
8 hours ago
Colin Genge joined Sean Lintow Sr's group
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Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what…See More
8 hours ago

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