18D-038 N Ht Combustion Air Clearance Summary Package 2011-07-05 SENSIBLE SOLUTIONS Engineering to Help You Grow
64 Knightly Rd Hadley, Ma. 01035 Phone & Fax: (413) 549-5593
E-mail: lkbarak@crocker.com
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To: Larry Lepine – Plumbing Inspector
CC: Jon Hite – Northampton Housing Authority
David Adamson - Northampton Housing Authority
Doug Courtemanche / John Connors- National Refrigeration Co (NRC)-
Dave Gour – NHA clerk of the works
Lily Kara Barak - Sensible Solutions- Mech Engineer
Louis Hasbrouck – Building Inspector
From: Lily Kara Barak – P.E. – Design Engineer
Date: 7/3/11
RE: Hampshire Heights Combustion Air Clearances
Larry,
As you requested for "record" purposes, I have put into (this) 1 package, the various
communications that occurred relative to the Northampton Hampshire Heights combustion air
clearances. This package includes:
1. This cover memo,
2. My initial sketch (Hampshire Heights Venting SK1 - options) sent to Carrier for their
review and comment.
3. My emailed explanation of the issues (to Carrier), Carriers response, and my text to you
when I forwarded Carrier's response. (1 email trail)
4. An SK2 showing the installation method you verbally told the Contractor’s site super was
"approved" - based on Carrier's input.
If you have any questions, or feel additional information should be included in this package,
please let me know.
Thanks, Lily
From: lkbarak@crocker.com
Subject: [Fwd: RE: Hampshire Heights Northampton Furance Combustion Air
Date: Wed, December 8, 2010 3:48 pm
To: LLepine@northamptonma.gov,lhasbrouck@northamptonma.gov
Cc: sing.org,doug@nhvac.com,joseph.dimare@state.ma.us,tom.barthelette@state.ma.us
Larry and Louis,
When this venting issue arose, I called and emailed the Carrier rep. who,
conferred in house with all relevant parties. My email to Carrier, and
their response are both below. Ron Beliveau is Carrier's manager of
commercial sales. Greg Mirando is Carrier's manager of technical
services.
Though Carrier doesn't specifically state the reasons they consider our
original venting arrangement satisfactory, I imagine it has to do with the
combination of horizontal and vertical separation. We would be both 8"
below and 33" away from the DHW vent. This compares to the separation
required from the furnace vent itself, which, with a concentric
termination is only a few inches of vertical separation, and with 2-pipe
termination is only 12" vertical separation.
As I mentioned on the phone to you, we did discuss a 3rd alternate at our
Friday meeting. That is to install a stainless steel 45 at the DHW vent
termination - extending the DHW termination 4-5" further away from the
original furnace OA termination. NHA, and the design team all prefer the
stainless 45 to the "water buffalo" PVC.
I'll call you to discuss if our original venting arrangement would be
satisfactory to you - with or without a stainless 45 on the DHW vent.
Thanks, Lily
--------------------------- Original Message ----------------------------
Subject: RE: Hampshire Heights Northampton Furance Combustion Air
From: "Beliveau, Ronald CAR" <Ronald.Beliveau@carrier.utc.com>
Date: Fri, December 3, 2010 11:13 am
To: lkbarak@crocker.com
--------------------------------------------------------------------------
Lilly,
Greg Mirando and I have had communication on your venting issue with the
Carrier factory application engineer. It is our position that the venting
as shown on your diagram as existing will meet Carrier requirements. The
alternate location will also meet our requirements. We hope the inspector
will use his judgment and accept the installation as is.
Regards,
Ron Beliveau
-----Original Message-----
From: lkbarak@crocker.com [mailto:lkbarak@crocker.com]
Sent: Tuesday, November 30, 2010 4:51 PM
To: Beliveau, Ronald CAR; doug@nhvac.com; lkbarak@crocker.com
Cc: jhite@hamphousing.org; dadamson@hamphousing.org;
Page 1 of 2[Fwd: RE: Hampshire Heights Northampton Furance Combustion Air
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tom.barthelette@state.ma.us; joseph.dirmare@state.ma.us
Subject: Hampshire Heights Northampton Furance Combustion Air
Ron,
Attached is a sketch of how the 1st 14 furances have been piped. As
piped, we currently have 33" direct-line clearance between the OA intake
and DHW flue, and 37" clearance between the OA intake and plumbing vent.
Since the Carrier installation manual calls for 3' clearance to both a DHW
vent and plumbing vent, the plumbing inspector is not accepting these 1st
installation.
The plan view, also shows a possible alternate for the OA piping, which
would give us the 36" required clearance to the DHW flue, while
maintaining 3' clearance to the plumbing vent. Although it gives us
greater horizontal clearance, it also MAY be "less safe", since the
chimney wall would not help as much to shield the OA intakes from any
down-draft of DHW gasses.
Please review with the factory engineer, and let us know what clearances
Carrier would recommend in this situation.
Thanks, Lily
Page 2 of 2[Fwd: RE: Hampshire Heights Northampton Furance Combustion Air
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