Air Monitoring - generalized VOC measurement

[Guest guest]

Dear Colleagues:

Is it just me, or does anyone else consider it inaccurate and misleading to call

the result from a generalized VOC detector, such as a PID, a TVOC value?

To me, a TVOC value is determined from a laboratory analysis with GC/MS

equipment.

Sincerely,

W. Bearg, PE, CIH

--

LIFE ENERGY ASSOCIATES

20 Darton Street

Concord, MA 01742-5710

www.LifeEnergyAssoc.com

-------------- Original message ----------------------

> Lew,

>

> I have personal experience using an AirAdvice monitor (model 5100).

> It measures temperature, RH, CO, CO2, particulates and TVOCs. The

> data collected is uploaded to the AirAdvice website via a phone jack

> on the side which dials a 800 number. There is no display on the

> device, the only way to access the data is when you upload it and log

> on to your account.

>

> You can print off raw graphs of the data or use one of their pre-

> packaged reports.

>

> My concern with the device relates to calibration. I'm not so

> concerned about the temp and RH falling out of calibration as I am

> the TVOCs and CO2.

>

> 's law is that if there's a problem in the building, you won't

> be there to see the symptoms. " Well everything was fine when I took

> my measurements. " By doing monitoring and not just point

> measurements, you better understand how the building is performing.

>

> You can measure some of the same parameters with less complex devices

> (HOBO). The advantage of AirAdvice is the ability to access the data

> remotely.

>

> I have a new Gray Wolf IQ-610 with PID that I will compare with my

> AirAdvice to see if the numbers come out similar.

>

> Ian Cull, PE, CIEC

> Indoor Sciences, Inc.

> www.indoorsciences.com

>

>

> >

> > Everybody,

> >

> > I've been aware of this company (AirAdvice) for several years.

> > Although I have not had personal experience with it's products,

> it's

> > product concept always seemed interesting. The company apparently

> has

> > a rather large installed base of monitoring equipment and

> services,

> > mostly sold, I gather, through AC installers. Now they have put

> > together some national-level summaries from their monitoring

> > database, which some may find as interesting as I do.

> >

> > Here's the link to see the national summary report (34 months, and

> a

> > little over 49,000 structures):

> > http://airadvice.com/company_info/publications.html

> >

> > And a link to see a PDF of a sample report from an individual

> location:

> > http://airadvice.com/hvac/about_monitor/AirAdvice_SmartIAQ.pdf

> >

> > Does anybody have personal experience with the quality and

> relevance

> > of the measurements this system produces?

> >

> > Lew Harriman

> >

> > ----------------------------------

> > Mason-Grant Consulting

> > P.O. Box 6547

> > Portsmouth, NH 03802

> >

> > LewHarriman@...

> >

>

>

>