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

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Aaren Stewart posted a discussion

Let's solve this HVAC quiz!!!

Answer these three simple problems of your HVAC systems, let's see how much you know your system…See More
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Chris Laumer-Giddens posted a blog post

Mini-Split Heat Pumps are Quirky, Especially their Capacity

Mini-Split Heat Pumps are Quirky and Still EffectiveThe name "mini-splits" generally refers to heat…See More
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Solar Course for Appraisers at SRP's Pera Club

November 13, 2014 to November 14, 2014
"As the US continues to search for energy alternatives, properties improved with solar PV…See More
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Hal Skinner replied to Hal Skinner's discussion What an RCC can do with no R- insulation in the walls.
"Just like paint.  RFoller and brush or strong airless sprayer.  It has the consistency of…"
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Hal Skinner replied to Hal Skinner's discussion What an RCC can do with no R- insulation in the walls.
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Hal Skinner added a discussion to the group The RCC Classroom (Radiant Control Coatings)
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Walmart goes green in Texas

We applied cour RCC to 5 Walmart superstores in Texas.  Worked great and they wanted it.  Then they…See More
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Kim Tanner replied to Trip Smith's discussion Where to spend my marketing dollars?
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Hal Skinner replied to Hal Skinner's discussion What an RCC can do with no R- insulation in the walls.
"Mornn Trip and Bud, In this case all I can do is report it exactly as it was told to me.  I…"
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