545 8th Ave, New York, NY 10018 (212) 682-2710 info@hamiltonair.com ABOUT ADMINISTRATIVE CONTACT ENGINEERING SERVICE Installations Servicing NYC HVAC since 1962 “Hamiltonair offers a variety of options to achieve any climate control goal” HamiltonAir Company, Inc., has been granted license #0829`30-DCA by the City of Mew York Department of Consumer Affairs as a Home Improvement Contractor. our EPA “Lead-Safe” Certificate number is NAT-33064-2 and Supervisory Employee Certificate number is R-R-88481-15-00133. Our State of New Jersey Consumer Affairs License number us 13VH00344600, and our State of New Jersey Master HVAC Contractor’s license number us 6039. The Management of the building may require approval before an installation can be started. There are two City Agencies that many projects will need to be filed with. One is the Landmark Preservation Commission which we will be responsible for at no additional cost since our staff handles this. The other is The New York City Department of Buildings. This filing requires a licensed Architect (which we do not have on staff) to obtain this Permit for you. We understand that the thru-the-wall equipment may have an enclosure built over it. Therefore, please be advised that you will need a grille (typically in the top of the enclosure) with a built-in deflection which will direct the air toward the center of the room, and a return air grille or a cutout at the base of the enclosure, which will allow air to circulate back to the unit. A piece of ductwork that connects the air conditioner to the enclosure grilles is also a requirement. Since these items are custom fabricated and based on dimensions which will not be known until the job is under way, their cost will not be included in our contract. Please be certain that the return air is equal to 140 square inches, and that the enclosure front is removable the entire width and height of the air conditioner. With respect to the procedure for cutting an opening thru‑the‑wall for air conditioning equipment, we will cordon off the sidewalk below, and have a “flagman” present during the scaffolding work. We place through the window above the site a small scaffold (48″ ‑ 60″) on which we place a cardboard box and around the open sides we place a canvas drop cloth. We then remove the interior courses of brick/block from inside the room, leaving the exterior course of brick/stone undisturbed. A mechanic then goes on the scaffold, marks the exact size of the opening which is then cut using a circular saw with a diamond tip blade. The brick/stone is then knocked inward with the use of a sledge hammer (the drop cloth and box stop any chips from falling to the sidewalk below). A cement foundation is then set (below the space to be occupied by the sleeve) with the required pitch to the exterior. We then apply a flashing fabric set in roofing mastic to the cement foundation, and turn it up both sides of the opening 4”, and the perimeter of the exterior opening is caulked. On Tuesday, March 10, 2009, there was a Scaffold Safety Forum held at the New York City Department of Buildings, 280 Broadway, which was attended by our Masonry Supervisor and Site Safety Coordinator, Mr. Ed Sutter. The Forum was conducted by a Mr. Chris Santull (Assistant Commissioner), during which he stated that he would waive the overhead protection requirement (sidewalk bridge) for a masonry job that could be completed within one day, but would require that there be Flagmen below the area of work. In addition, we have to cordon off the sidewalk beneath the area in which we are working. We are also required to notify the Building Department a day prior to our rigging, at which time they supply us with a confirmation number. Please be advised that the Building Department of the City of New York, Building Management or the masonry contractor may require that we have a man on the sidewalk during the masonry work. Therefore, we will have a “flag man” on the sidewalk during that period when we are working on the exterior walls. * In compliance with the Building Department of the City of New York, we will cordon off the sidewalk beneath our scaffold, and have a “flagman” present during the exterior work. LOBBY AIR CONDITIONING PROJECTS (7/29/19) (Ducted systems unless otherwise noted) *CONSOLE DUCTLESS SYSTEM **WALL HUNG DUCTLESS SYSTEM © 2021 HamiltonAir. Inc.