[Greenbuilding] Geothermal a/c

[Ron Cascio]

Alan,

In my mind it goes without saying, that the first task is to reduce the HVAC load of the building up front in order to reduce the size and operating costs (those besides $ included) of any supplemental HVAC system. 

Ron
 
  ----- Original Message ----- 
  From: Alan Abrams 
  To: Green Building 
  Sent: Saturday, July 23, 2011 9:41 AM
  Subject: Re: [Greenbuilding] Geothermal a/c


  an equally important consideration (besides the relative efficiency of one mechanical system vs another) is whether it makes more sense to drill baby drill and pay baby pay for geothermal, or to put a comparable effort into air sealing and insulating, etc, and installing a smaller conventional mechanical system accordingly. 

  this is not to say that there are situations where a deep energy retrofit is too intrusive, and a gizmological (to borrow from thoughtful Ontarian friend) solution is the better deal.  But in principle, my working assumption is that conservation is the first task.

  AA


  Alan Abrams
  Abrams Design Build LLC
  A sustainable approach to beautiful space

  6411 Orchard Avenue Suite 102
  Takoma Park, MD 20912
  office  301-270-NET- ZERO (301-270-6380)  
  fax      301-270-1466      
  cell     202-437-8583
  alan at abramsdesignbuild.com
  www.abramsdesignbuild.com




  On Fri, Jul 22, 2011 at 10:08 PM, Matt Dirksen <dirksengreen at gmail.com> wrote:

    I heard from a mechanical engineer friend that the inverter tech in mini-split systems is making it's way into central systems now. Carrier should have it's new stuff out this fall. Lennox may even already have it out, for all I know. He says that it's efficiency should rival the current ground source heat pump systems, but without the need of well digging.





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