Sean Wiens replied to Todd Abercrombie's discussion Watts Up? Pro - Software Download
"Cheers"
Feb 18, 2020
Sean Wiens replied to Todd Abercrombie's discussion Watts Up? Pro - Software Download
Feb 14, 2020
Sean Wiens posted discussions
Feb 10, 2020
Sean Wiens replied to Kyle Baker's discussion Thoughts on EVs? Love em or hate em?
"If you are concerned about environmental footprint, then they make no sense in the USA at all unless you are feeding them with PV or are on a grid dominated with renewable and/or hydro.  On the standard US grid with an efficiency of 3.5 or worse,…"
Jan 27, 2020
Sean Wiens replied to Sean Wiens's discussion Insulating Chilled/Cold Water Lines
"Just a follow up to Mark's post "cold waterlines in this space wont be exposed to outside humidity"
I am actually more worried about the indoor summer time humidity.  Typical indoor conditions will be somewhere in the 50% -60% indoor humidity at…"
Jan 20, 2020
Sean Wiens replied to Sean Wiens's discussion Insulating Chilled/Cold Water Lines
":-) - Guess I should not read so literal! That makes more sense."
Jan 20, 2020
Sean Wiens replied to Sean Wiens's discussion Insulating Chilled/Cold Water Lines
"Thanks for reply Mark - appreciate the follow up.
Most of the piping will be routed through interior walls, so the VB would not be present.
I am generally running continuous PEX lines from manifold to fixture stops, so will not have hidden joints. …"
Jan 20, 2020
Sean Wiens replied to Sean Wiens's discussion Insulating Chilled/Cold Water Lines
"Realized the comment above did not make total sense.  Of course our outside dew cycles has nothing to do with interior pipe insulation.  But yes we do have pipe condensation issues.  Cold water lines (incoming temp 40F-50F) are below the dewpoint of…"
Jan 17, 2020
Sean Wiens replied to Sean Wiens's discussion Insulating Chilled/Cold Water Lines
"Hi David,  Thanks for follow up.
It is becoming common to insulate the cold lines to prevent condensation now that most new construction turns basements into living space.  We have a LOT of dew cycles in our climate (probably thousands a year), so…"
Jan 17, 2020
Sean Wiens replied to Sean Wiens's discussion Insulating Chilled/Cold Water Lines
"Thanks Sean - I do not have 'wet walls' most places I will be installing the supply tubes.  So definitely cannot drill holes larger enough to allow continuous insulation in the 2x4 sticks. And even a 2x6 would not be allowed by code to drill a 1.75"…"
Jan 16, 2020
Sean Wiens replied to Sean Wiens's discussion Hydronic System Critique
"- if you mean circulators - yes of course they can be changed. No other motors beside outdoor heat pump.
- heat transfer plates get full?  this is what heat exchanger plates are - no opportunity for them to 'get full'…"
Jan 14, 2020
Sean Wiens replied to Sean Wiens's discussion Hydronic System Critique
"Lots of questions - some of the easiest ones first.
I am firmly in the camp of hydronic space conditioning vs forced air. It is more efficient from an energy standpoint and radiant heat beats convection heat any day in my books.  It is also much…"
Jan 13, 2020
Sean Wiens replied to Dan Antonioli's discussion Condensation Quick Fix
"condensation is always worse on north facing roofs in the northern hemisphere because those roofs do not see the sun and are cooler. Outdoor kitchen is probably more open than the barn meaning the metal roof has less chance to operate independently…"
Jan 13, 2020
Sean Wiens replied to Dan Antonioli's discussion Condensation Quick Fix
"Perhaps if the person who built the barn and roof had even a basic understanding of building science or even barn building, they would have understood that this is common condition in open air barns with metal roofs and that some form of drip…"
Jan 13, 2020
Sean Wiens replied to Sean Wiens's discussion Hydronic System Critique
"Just in case it is not clear - the heat pump graphic was the only one available in the software used to draw this. It will be refrigerant and not water connected between the outdoor heat pump and DX2W"
Jan 12, 2020
Sean Wiens replied to Sean Wiens's discussion Hydronic System Critique
"Thanks for reply Sean.  
Yes - I will also be cooling via the radiant panels.  The cooled water will extract heat from the objects in the room.  This is not common in residential but is used a lot in commercial spaces.
The water going to the ceiling…"
Jan 12, 2020
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