[Greenbuilding] small in line heat pump

[Don Lush]

John- Following up on this I have operating separately from the HRV a whole
house HEPA system that circulates air from an open concept basement to all
upstairs rooms. It operates  up to 1000 cfm on high setting. 

Are you aware of a "mini split" system in which the indoor coil is not in
the conventional wall mounted unit with its own fan and drain system, but
rather one that could be integrated into or is specifically designed to be
integrated into the HEPA or any other duct system designed to circulate air?


At present the whole house HEPA system draws air from a well- insulated walk
out "basement" (designed as a heat sink with all of the insulation (EPS R
30) on the outside of the concrete) and circulates it throughout the house
stabilizing temperatures and maintaining air quality. Having an in duct
"mini split" would allow supplemental heating and cooling of circulating air
on cold winter days and warm summer ones. I presently have a Fujitsu mini
split mounted on the basement wall but I think its ability to heat and cool
would be much more efficient integrated into the HEPA duct system. 

Thanks Don



-----Original Message-----
From: greenbuilding-bounces at lists.bioenergylists.org
[mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of John
Straube
Sent: Thursday, March 22, 2012 2:26 PM
To: Green Building
Cc: healthyhomebuilding at yahoogroups.com
Subject: Re: [Greenbuilding] small in line heat pump

Thats a tough one Mr Abrams
To deliver 12 KBtu you need about 400, preferably 450 cfm.  So what kind of
ERV is it? most residential scale ERVs are like 50 to 150 cfm to serve
normal size homes. 400 cfm ERV must be for a commercial use?
If you are talking water source HP, Trane  and Florida Heat Pump (now bosch)
makes a line of water to water heat pumps that small, and you use a stadard
coil in the air stream.
For air to air, all of the standard split units (meaning you can put the
coil in a duct airstream) start at 18 kBtu/hr.  Which requires a lot more
airflow yet again. But Goodman Trane Carrier all make units at 1.5 tons,
they are just not that efficient.

On 12-03-22 11:43 AM, Alan Abrams wrote:
> anyone know of a small capacity (12K - 18KBtu) heatpump, suitable for
installation in line with an ERV?
>
> -a
>
>
> *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 
> <mailto:alan at abramsdesignbuild.com>
> www.abramsdesignbuild.com <http://www.abramsdesignbuild.com/>
>
>
>
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--
Prof. John Straube, Ph.D., P.Eng.
Faculty of Engineering
Dept of Civil Engineering / School of Architecture

www.buildingscience.com

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