Christopher Morin
  • Male
  • Clinton, MA
  • United States
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Latest Activity

Hal Skinner commented on Christopher Morin's blog post Should this Duct Layout be Banned?
"Hi Christopher, Here is a discussion I started on how we use an RCC to insulate cooling  / heating equipment and ducts in attics. Conditioned air in attics? Not me!"
Sep 5
Dennis Heidner commented on Christopher Morin's blog post Should this Duct Layout be Banned?
"In the picture above, it appears that the attic has been turned into conditioned space.  The temperature stacking chart presented is not likely to be what you would see.   Turning the attic into conditioned space also helps with…"
Sep 4
John Proctor commented on Christopher Morin's blog post Should this Duct Layout be Banned?
"We found with the ducts on the floor of the attic, with smaller ACs, with shorter runs, with the ducts buried in lots of insulation, in hot dry climates, that there is almost no penalty for having the ducts in the attic and it is a lot easier…"
Sep 4
Christopher Morin's blog post was featured

Should this Duct Layout be Banned?

When is it ok to put your ducts into an attic, tight up against the Roof Deck?  With more conventional building techniques, I would have to argue: NEVER!  I do not care how the homeonwer pleads to keep their storage space, you cannot count on delivering cool air to the conditioned space with said branch duct.  Even if you did figure out a way to secure the duct to the peak without crushing the inside diameter, the CFM is not the problem.  The real issue becomes the dry bulb temperature of the…See More
Sep 4
Christopher Morin posted a blog post

Should this Duct Layout be Banned?

When is it ok to put your ducts into an attic, tight up against the Roof Deck?  With more conventional building techniques, I would have to argue: NEVER!  I do not care how the homeonwer pleads to keep their storage space, you cannot count on delivering cool air to the conditioned space with said branch duct.  Even if you did figure out a way to secure the duct to the peak without crushing the inside diameter, the CFM is not the problem.  The real issue becomes the dry bulb temperature of the…See More
Sep 3
j. west commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"You're right Christopher- the trick to saving the profit margin is being in several places at one time. And you can't do that without a solid quality assurance process.  I've spoke about this this exact subject all over the…"
Sep 1
Eric Kjelshus commented on Christopher Morin's blog post Top 5 Changes to ACCA Manual S
"I run loads each day.  BUT my completion does not,    I see so much over sizing  last job was needing 34,000 and he put in 120,000 BTU's ( the box fit)  I took out 1/2 the burners so the BTU fit the duct work and closer…"
Aug 28
Christopher Morin's blog post was featured

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 HVAC industry.  Think about it: ECM Motors were in their infancy, condensing furnaces…See More
Aug 28
Christopher Morin posted a blog post

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 HVAC industry.  Think about it: ECM Motors were in their infancy, condensing furnaces…See More
Aug 27
Sean Lintow Sr commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"4% TOTAL Ted - Leakage to outside was stripped from the codes & for good reason"
Aug 26
tedkidd commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"Wait!  4% total leakage or 4% leakage to outdoors? "
Aug 26
Sean Lintow Sr commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"4% can be tough up front but easily doable - The best time to test for many is on rough with the air-handler installed. Make sure for the first few that the HVAC contractor and crew is there to let them see what it takes to tighten…"
Aug 25
Tom Pfau commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"The 2012 IECC regulations "do not apply in municipalities that have adopted the Stretch Energy Code to buildings governed by the Stretch Energy Code.  For those buildings the current Stretch Energy Code (which uses IECC 2009)…"
Aug 25
Colin Genge commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"I recommend your guidance be universal instead of providing specific instructions on how to operate one brand of equipment without showing others. Such as Retrotec's that has about half the current duct tester market share. We have amazing…"
Aug 25
Everblue commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"If anyone is looking to get trained on duct testing, BPI is set to launch a new certification called BPI Infiltration and Duct Leakage (IDL). This standalone certification would speak to the exact issue that you are referring to and would meet this…"
Aug 25
tedkidd commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"lol.  ya think?   I guess it depends on what QC measures exist.  Also, what will be the definition of, and penalty for, lying?  Will anybody be caught?  Will public examples be made?  Or is this another hope for the…"
Aug 25

Profile Information

Company
Conservation Services Group
Professional Certification
BPI BA, NATE, MA Master Sheet MetaL
Blog URL
http://excessair.blogspot.com
Facebook Page
http://www.facebook.com/pages/Excess-Air/208884575867523
LinkedIn Profile
http://www.linkedin.com/profile/view?id=59140122&trk=tab_pro

Christopher Morin is currently the HVAC Technical Field Representative for Conservation Services Group (CSG) and the Cool Smart Program. An ACCA approved Residential System Design Instructor, Christopher instructs participating contractors and technicians on proper system design, quality installation verification (QIV), Energy Star Quality Installation (ESQI), and duct testing – both in the classroom and in the field. Christopher holds a B.S. in Business Management from University of Phoenix, MA Master Sheet Metal License, BPI Building Analyst, as well as NATE Certifications in Installation and Service for Heat Pumps, Air-Conditioning, and Gas Furnaces.

Christopher Morin's Blog

Should this Duct Layout be Banned?

When is it ok to put your ducts into an attic, tight up against the Roof Deck?  With more conventional building techniques, I would have to argue: NEVER!  I do not care how the homeonwer pleads to keep their storage space, you cannot count on delivering cool air to the conditioned space with said branch duct.  Even if you did figure out a way to secure the duct to the peak without crushing the inside diameter, the CFM is not the problem.  The real issue becomes the dry bulb temperature of…

Continue

Posted on September 3, 2014 at 6:24pm — 3 Comments

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

Posted 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

Posted 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

Posted on August 12, 2014 at 1:19pm

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