Perry Ning replied to Andrew Vidal's discussion Looking for a good load calculation software in HVAC
"Hi John,
    Very good Graphic Method.  With your permit, I would like to download your PDF to my website heatExch.com. Please leave me a reply here if I could do that.
    Thanks,
    Perry Ning, owner of heatExch.com

 "
Sep 23, 2013
Perry Ning replied to Perry Ning's discussion Cooling His Room With a Big Refrigerator - What is Wrong with That?
"You are right!
Here are some more challenging questions. They may not be challenge enough for you, but your answers may help others. Thanks,  Perry
http://homeenergypros.lbl.gov/forum/topics/sizing-a-ground-heat-exc... ???"
Sep 14, 2013
Perry Ning replied to Perry Ning's discussion What About DIY Geothermal Heat Exchangers for Heat Pumps?
"What about sizing?  I have write the basic steps to size a GHE.  It would be great if you can check me out and give some comment. http://homeenergypros.lbl.gov/forum/topics/sizing-a-ground-heat-exc....

Thanks, Perry"
Sep 14, 2013
Perry Ning posted a discussion
Ground Heat Exchanger (GHE) is the key to the efficiency of a Ground Source Heat Pump (GSHP). However, GHE is not standardized as other parts of the GSHP. It is basically a bunch of tubes that need to be properly sized and burred in the ground.…
Sep 14, 2013
Perry Ning commented on Anna Jursik's blog post Public Art to Promote Energy Efficiency
"    Yes. Do something. Once people get into the action, they will actually enjoy it. I just had a lesser proposal to see if our expert here would favor a DIY: http://homeenergypros.lbl.gov/forum/topics/what-about-diy-geotherma....
     You are…"
Jul 11, 2013
Perry Ning posted a discussion
     Many of our pros here are also DIY experts. You may have done or plan to do some geothermal projects. Do you favor a contractor or yourself for the actually installation?     To initiate the discussion, heat pump performances are closely linked…
Jul 11, 2013
Perry Ning replied to Perry Ning's discussion Cooling His Room With a Big Refrigerator - What is Wrong with That?
"Very good.  Why the room got hot?"
Jul 6, 2013
Perry Ning posted a discussion
       It was very hot this July 4th for Peter when his room AC broke down.  Nothing taste better than a cold beer from the refrigerator.         The cool air from the fridge gave Peter a COOL idea.  He sealed the whole room tight and kept the big…
Jul 6, 2013
Perry Ning commented on Robert D York Jr's blog post Not getting it
"I still own an old house in Connecticut.  I understand exactly what you are talking.  One good way to show people heat is an infrared thermometer with a good display if you do not already have one. Scan inside of a house in summer and outside a…"
Jul 6, 2013
Perry Ning commented on Jakob Barry's blog post Changing The Way We Use AC
"Hi Adam, The new video link works.  I actually watched the whole video.  Very interested.  Ductless or mini split is the way to go.  "
Jul 5, 2013
Perry Ning commented on Perry Ning's blog post Warnings About Portable Air Conditioners
"Hi Adam, Thank you for the comment.  Have a nice summer!  Perry"
Jul 5, 2013
Perry Ning commented on Jakob Barry's blog post Changing The Way We Use AC
"Good points.  Also when weather gets hotter AC efficiency drops.  That means more electricity is turned to heat by the AC.  For a portable AC this heat is added to the room that has also to be removed. See my post in this forum…"
Jul 5, 2013
Perry Ning posted a photo
For single hose portable air conditioner, about 50% of that heat removed is produced by the unit or sucked in by the unit from outside the house. In comparison, a window unit or a central air unit only has waste heat from the indoor fan for removal…
Jul 2, 2013
Perry Ning posted a blog post
Warnings About Portable Air ConditionersHere are some warnings about portable air conditioners to help you to be aware of their low energy efficiency rating when purchasing a new air conditioner. If you already have a portable air conditioner or if…
Jul 2, 2013
Perry Ning replied to Johnny Ritzo's discussion Selecting a Water Heater
"My suggestions is to find a gas powered heat pump. We need to avoid burning electricity for heat whenever possible. If you put the same amount of electricity in a heat pump, you can pump 4 times more heat in a climate like California.  Google for…"
Jul 2, 2013