HomeMy WebLinkAboutEngineering Judgement.pdf May 2, 2018
To: Mr. Chris Belby(cbelby(c tolin.com)
Re: Marriott Vail-Kitchen Hood and exhaust system review
Mr. Belby:
Martyn Engineering visited Vail Marriott site located at 715 West Lions Head Circle. Vail, CO 81657 on May 2, 2018. The
purpose of our visit was to review the kitchen hood replacement, existing and new grease exhaust duct integrity and
condition,fan system and grease duct fire enclosure.
The following was observed/noted:
• Existing system has been operational for 40-50 years. Ductwork/Airflow is not being modified, Hoods are being
replaced with more modern hood to improve operation/maintenance. We understand the replacement hoods are
engineered for proper operation with existing exhaust flow rates using existing Roof Utility Exhaust fan.
• Ductwork is 16 gage stainless steel,welded construction. It was noted that new ductwork installed was light tested
by sheet metal contractor(Parker Sheetmetal)
• Vertical Exhaust ductwork is enclosed in concrete CMU from base of riser to roof per code.
• Vertical grease duct was observed in good condition (no grease accumulation)and integrity of duct appears intact.
• Duct velocity(based on exhaust fan cfm)is in excess of 1750 fpm (as required per code)
• Existing Horizontal ducts have been cleaned and we understand additional cleanouts are being added to allow
comprehensive maintenance/cleaning.We understand cleaning will occur quarterly(4x/year). This will enhance
and improve safety of this existing system.
After site walk, we visited with Mr. C.J. Jarecki at town of Vail office to review these findings. We understand there is a
requirement to perform a light test that can be observed by an official with the town of Vail after all cleanouts are added.
It was discussed/noted during conversation with C.J.that the other conditions of existing system listed above are
acceptable for permit operation and compliance,
If you have any questions or need any additional information, please do not hesitate to contact our office
Sincerely
Phil Gioia, P.E
Martyn Consulting Services
303-589-3938
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SHAFT CMU ENCLOSURE-ROOFTOPPING BASE OF SHAFT VERTICAL RISER—
CONDITION OF VERTICAL DUCT
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SHAFT CMU ENCLOSURE WALL(EXTERIOR OF SHAFT)
CC: Bill Felsher, Mike Clement—Tolin—Via email
Brant Marott—Vail Resorts (bmarott@vailresorts.com)
MARTYN CONSULTING SERVICES, LLC 2