Welcome to 386 Park Avenue South's Tenant® Portal

Please click here for the Tenant's Contractor Indemnity Form

GENERAL

The terms "386 Park South LLC c/o HSRC Management LLC", "Landlord" and "Building Management" are interchangeable.
The term "Contractor" refers to the General Contractor or Construction Company responsible for overseeing the project.
Tenant must furnish Building Management with their contractors' Certificates of Insurance prior to the start of construction. The Building Manager reserves the right to require actual policies.
Tenants and tenants' contractors must execute Contractor's Indemnity Form.
Eight (8) sets of prints and one (1) set of reproducible drawings must be submitted to 386 Park South LLC c/o HSRC Management LLC for approval prior to proceeding with any installations and/or alterations. All drawings must be prepared by a N.Y.C. licensed Architect or Engineer. All engineering drawings must be complete (ready for submission to the Building Department) when sent to 386 Park South LLC c/o HSRC Management LLC for review. Revisions to drawings and/or specifications must be resubmitted for approval and/or comments. Revisions must be clearly indicated on drawings and dated in a revision box with a brief, precise description of the revisions made.
Design drawings must be prepared utilizing AutoCAD 12 or 13 format, employing AIA layering guidelines.
Symbol legends for all systems and devices must be shown on drawings.
All plans must be drawn at either 1/8" or 1/4" per foot scale; details are to be of sufficient scale to show complete information required for fabrication and installation.
Design and installation of all electrical, plumbing, HVAC, fire and life safety (Class "E") systems and equipment must be in compliance with 386 Park South LLC c/o HSRC Management LLC Standards for the building, the Administrative Code of The City of New York, Rules of the City of New York and all other governing codes and standards.
Tenant shall retain the services of the Building recommended expeditor for Building Department expediting services. All Building Department forms (i.e. Plan Work Approval [PW-1], Statement of Responsibility [TR-1], Plumbing Schedule) must be completely filled in with the exception of Owner's Authorization as to applicant and plan responsibility and submitted to 386 Park South LLC c/o HSRC Management LLC with final plans.
Tenant shall furnish 386 Park South LLC c/o HSRC Management LLC with the Certificate of Inspection from the Bureau of Electrical Control upon completion of any electrical work necessitated by the alteration.
Compliance with all requirements of the Americans with Disabilities Act (ADA) is the Tenant's responsibility.
All work is to be performed during the normal building hours of 8:00 AM until 5:00 PM, Monday through Friday, excluding holidays observed by the building or Union Locals 94 or 32B/J. Contractors and their employees shall vacate the building by 5:00 PM on normal building workdays. Tenant will be billed at the prevailing Fire Safety Director rate, for a minimum of one (1) hour for supervising the contractor or their employees who fail to vacate the premises by 5:00 PM.
Provide updated fire protection plan drawings (8 1/2" x 11" drawing format) to Building Manager, indicating location of all life safety/fire protection devices and exit signs/emergency lights.
All abandoned or unused cabling, raceways, sheet metal ducts, pipes, etc. shall be removed back to the point of origin.
All required building systems shutdowns – electrical, HVAC, plumbing, fire protection and life safety (Class "E") - must be coordinated with, and approved by Building Management at least three (3) days in advance of desired shutdown.
Equipment Use Permits must be provided to Building Management prior to operating any equipment requiring such permits.
Copies of applicable permits must be provided to Building Management prior to any welding or burning.
Repair or replace all fireproofing damaged as a result of the Tenant's renovation efforts. Provide required firestopping at conduits, bus ducts, pipes, ducts, etc., at all slab and wall penetrations.
Locks shall be keyed to the Building Master and Floor Master. Please reach out to Property Management.
If the Contractor does not provide "Post-Construction" Cleaning, the Tenant may request, from the Building Management Office, cleaning services upon completion of the construction project. Tenant will be billed for cleaning services at the prevailing rates.
At the completion of the construction project, the Tenant is responsible for ensuring the submission of "As-built" record drawings (as described under "Contractor's Responsibilities") to the Building Manager. In addition, Tenant shall provide in Excel format, a summary of the connected and demand electrical load by phase for base building panelboards and risers. If any additional alterations are made within the Tenant's space during the term of the lease, it shall be the tenant's responsibility to revise "As built" drawings and demand load summary and provide copies, on disk, to 386 Park South LLC c/o HSRC Management LLC. It is recommended that Tenant not make final payment until final drawings and sign-off are received from the Contractor.
Transportation of construction materials, equipment and furniture through the building, and storage of construction materials, shall be in a manner that does not overload floor systems.

CONTRACTOR'S RESPONSIBILITIES

Contractor shall submit the following information to Building Management:
- A list of all subcontractors for approval.
- A list of all chosen subcontractors and employees who will be working in the building. Workers will not be granted access into the building without prior notification from the Contractor.
- A copy of the project schedule. Revised copies should be provided as changes to the schedule are made, together with an updated listing of all drawings issued.
- Certificate of Insurance for all trades, in accordance with this document.
- Executed Contractor Indemnity Form.
- A copy of all Permits (i.e., Department of Buildings, Fire, Environmental Protection, Transportation, etc.)
- A copy of applicable Permits must be sent to Building Management prior to any welding or burning.
- Within 30 days of job completion: submit 4 complete sets of "As Built" drawings, as follows:
  - Two sets of full-size (1 to be sepia), one set of 8 1/2" x 11" and
  - One set on AutoCAD Version 12 or 13, employing AIA layering guidelines.
386 Park South LLC c/o HSRC Management LLC shall be invited to attend project progress meetings. The Contractor shall provide 386 Park South LLC c/o HSRC Management LLC with copies of minutes from project progress meetings.
The Contractor shall advise 386 Park South LLC c/o HSRC Management LLC of any deviations from the approved plans.
Fire exits and stairs shall be kept clear and accessible at all times.
Operable fire extinguishers must be on the job site at all times.
Applicable permits, a Fire Watch (by persons carrying Form 820 – Certificate of Qualification and Fitness) and protective blankets are required for any burning or welding.
The Building Management Office must be contacted prior to the removal of hardware, venetian blinds, light fixtures and other building standard reusable fixtures or equipment.
All work performed that may inconvenience or disturb other tenants must be scheduled before 8:00 AM or after 6:00 PM, Monday through Friday, or on weekends. Building Management reserves the right to stop such work during normal working hours.
Any part of the Building, including all building equipment rooms, damaged during alterations shall be repaired to the Building Manager's satisfaction. The General Contractor and Tenant are to make arrangements with the Building Manager to inspect the site before construction to determine the existing conditions and to notify the Building Manager, in writing, of any exceptions.
Materials or refuse of any kind are not to be stored in any building hallway, electrical closet, telecommunication room, restroom or any mechanical equipment room. Any materials stored in any of these areas are subject to removal and disposal at Contractor's expense, without prior notice to Contractor.
The Contractor is responsible for its own trash removal on a regular basis. Construction personnel must keep the work areas clean and free of trash at all times. Refuse and debris removed from the work areas must be deposited in a container and removed via the service elevators to the freight lobby. Neither full nor empty containers nor debris are to be stored and/or staged in the freight hallway, or in any base building area. Any debris found in base building areas will be disposed of at Contractor's expense.
Workmen will be assigned one restroom area. The Contractor is responsible for the proper protection of the assigned restroom area, as directed by Building Management. The Contractor will be responsible for any and all damages to the assigned restroom area. The Contractor is also responsible for the proper cleaning of the assigned area (which includes the maintenance of paper products).
Loud or abusive language or the playing of music that can be heard outside the work area will NOT be tolerated. The use of non-prescription drugs or alcohol is strictly prohibited on the Building site. It is the responsibility of the Contractor to enforce these regulations on a day-to-day basis and to immediately respond to specific complaints from other tenants or Building Management.
Work shall be in compliance with all local, state and federal laws and regulations. Notwithstanding anything contained herein, applicable governing codes or regulations which are more restrictive than the Landlord's standards shall be the codes and regulations followed.
The Contractor is responsible for ensuring that base building areas are thoroughly cleaned upon completion of construction. This includes Electric Closets, Telecommunication Rooms, Janitor's Closets and Restrooms.

CONSTRUCTION MATERIAL DELIVERIES

All deliveries related to construction activity are to be scheduled through the Building Management Office a minimum of 72 hours in advance, i.e., three (3) business days prior to the planned delivery date.
Construction materials shall be delivered to the job in proper containers and shall be stored in the Tenant work area. Materials must not be stored in public areas (i.e., freight lobbies, loading dock areas, public corridors.) All deliveries are to be made through the freight elevator located in the basement. All construction personnel, material and equipment must access the building through the freight entrance. All construction personnel must also access the building through the freight elevators. Construction Personnel shall not use the passenger elevators.
Procedures for moving construction material and furniture at 386 Park Avenue South freight entrance located on 27th street:
1. Tenant and/or Construction Company must notify the Building Manager at least 72 hours in advance of required date for moving materials.
2. Large and oversized deliveries must be scheduled before 8:00 AM, after 6:00 PM,or on weekends. Service elevator scheduling is done on a "first come, first served basis." Building Management reserves the right to stop any deliveries being made during the day which impede the normal operation of the service elevators.
3. Any oversized deliveries which require access to the freight elevator top or hatch will require the services of an elevator mechanic, whose time will be billed to the Tenant at the prevailing rate.
4. A security guard is required to be on duty whenever the freight entrance door is open for an extended period of time, outside business hours. A service elevator operator is required whenever the freight elevator is needed. Arrangements for security guards and for service elevator operators are to be requested through the Building Management Office.
5. Building Management will bill the Tenant at the prevailing rates and work rules for elevator operator, operating engineer, security guard and any other services provided during construction. Contact Building Management for a copy of the prevailing rates.
6. Building material shall not be stored or transported through the building in a manner that overloads floor slabs and the freight elevator.

SAFETY

The Contractor is responsible for ensuring that the workplace is maintained in a safe and orderly manner for all persons working within the area.
Danger and warning signs shall be prominently displayed, and every precaution exercised to offer the fullest protection to pedestrian traffic in and around the premises, building tenants and their guests, and Building Management and maintenance personnel.
Particular attention should be paid to fire safety precautions during construction, particularly when welding is required. Storage of flammable and combustible material must be done with the prior written approval of Building Management.
The Contractor shall conform to construction and building fire regulations as directed by Building Management, in addition to regulations and practices as required by local governing authorities.

INSURANCE (Click here to access a sample Certificate of Insurance. Please call the Building Management Office with further instruction.)

Before the start of any work, or delivery of any materials to the premises, Landlord shall be provided with Certificate of Insurance as follows:
1. Workmen's Compensation - Statutory Limits plus $500,000 for Employers Liability
2. Broad from Comprehensive General Liability, including Products completed Operation - $1,000,000.
  - The Certificate Holder will be 386 Park South LLC c/o HSRC Management LLC at 386 Park Avenue South, 2nd Floor, New York, NY 10016
3. Umbrella Policy of $2,000,000.
4. Automobile Liability Insurance with the following minimum coverage:

Insurance Certificates from carriers must provide for at least 30 days advance notice of any change or cancellation. The contractor and Tenant jointly and severally agree to indemnify and hold harmless all Protected Parties against all claims, liabilities, judgments, costs and expenses (including attorney's fees and disbursements) incurred by any of the protected parties arising out of or in connection with the work whether due to the negligence, acts or omissions of the Contractor and/or Tenant, their agents and employees or whether incurred to applicable law or otherwise by any protected party.

PROTECTION

Protect walls, floors, stair doors in public areas and elevator cabs subject to construction traffic.
Disconnect electric power before demolition work commences. Install temporary lighting.
Protect perimeter induction unit enclosures against dirt and dust. The enclosures must be cleaned and restored, if necessary, when construction work is finished.
Install shoe wiping mats at all openings between public and construction areas and maintain them as needed.
Remove construction debris and excess material from the Building before 8:00 AM or after 6:00 PM. Containers are not allowed on the sidewalks at any time whether they are empty or full, unless they are in the process of being emptied or picked up by the demo company. The containers must remain in the work area until such time as the truck arrives, and then immediately must be returned to the work area or removed from the job site in their entirety.
If dollies, hand trucks and Contractor's lock boxes do not have rubber wheels and bumpers, proper protection must be used to protect building areas.

STRUCTURAL

Provide layout drawings indicating the weight, location and dimensions of any heavy equipment (vaults, rolling files, batteries, transformers, storage racks, A/C units, pumps, etc.) supported on floors or hung from the building structure. All such equipment installations are subject to approval of, and must be installed in accordance with the recommendation of the Owner's Structural Engineer.
Where hangers cannot be supported from building structure, install two double expansion shields connected by a 2" x 2" angle from which the hanger rod shall be suspended. For ductwork and pipe sizes 2" and under, use a single double-expansion shield subject to the approval of the Structural Engineer. The carrying capacity and size of each shield shall be calculated on the basis of the spacing indicated above but the minimum size shall be 3/8". Hanger rods shall be of adequate size to support the loads, which they carry. Shields may be used in stone concrete only. No power or power actuated inserts will be permitted. The intention is to provide supports which, in each case, shall be amply strong and rigid for the load, but which shall not weaken or unduly stress the building construction.
Requirements for Floor Penetrations to Accommodate Communication, Electrical Conduits and Piping:
1. Penetrations through slabs shall not be installed over girders, beams, column pedestals, or columns.
2. Penetrations shall be kept to an absolute minimum in size, 1/4" larger than the diameter of the conduit. (Fire stopping can follow by foaming methods).
3. Where possible, tenants shall exercise prudence to consolidate wiring to minimize the number of floor penetrations.
4. All small holes shall be hand-drilled.
5. Where core-bored penetrations are required, they shall be kept to a minimum and shall likewise be as small in diameter as is necessary to accommodate the conduit and/or pipe.
6. Core boring holes if used, shall not damage or cut any floor reinforcing bars and likewise not be positioned over building structure.
  - Whenever core boring is to occur, all reinforcing shall be located by magnetic means.
  - Holes shall likewise only be 1/4" larger than the protruding conduit.
  - Procedures for core borings in reinforced concrete column strips and pedestals, if absolutely required, shall be specified by the Tenant's architectural or structural engineer. Such specifications shall include any required reinforcing, all of which shall be approved by the Owner's structural engineer.
7. If duct, large diameter penetrations, and/or multiple, closely-spaced penetrations must be installed, structural reinforcing must be provided by the tenant.
8. All tenants' construction documents and construction shall reflect and meet these requirements.

FLOOR LOADING

Live load per sq. ft. 120lbs. (varies by floor).

HEATING, VENTILATION & AIR CONDITIONING SYSTEMS

HVAC Design Criteria:

Temperature and Humidity Design Conditions

Summer Outdoor 89° F dry bulb, 73° F wet bulb

Indoor 78° F dry bulb

Winter Outdoor 15° F dry bulb

Indoor Indoor 70° F dry bulb (no humidity control)

Cooling Load Conditions

People One person per 100 usable sq. ft.

Outside Air Quality 0.13 cfm per usable sq. ft. (New York City Ventilation Code)
Location of water-cooled condensing equipment must be approved by 386 Park South LLC c/o HSRC Management LLC.
Tenant systems must comply with the 1990 Clean Air Act (release, testing, repair, installation, training, serving, etc.) and subsequent amendments covering refrigerants.
Systems containing refrigerants shall be installed in accordance with the requirements of the latest version of ANSI/ASHRAE-15. Refrigerants containing CFC's are not permitted.
Duct systems shall be constructed in accordance with the following SMACNA HVAC duct construction standards:
1. Ductwork downstream of VAV boxes 1-inch pressure class per Table 1-4, Class C sealed.
2. Ductwork upstream of VAV boxes 2-inch pressure class per Table 1-5, Class B sealed.
3. The suction and discharge of all exhaust systems shall be 2-inch pressure class per Table 1-5, Class A sealed.
Piping systems circulating water shall utilize ASTM B-88, Type K or L hard-drawn copper pipe with wrought copper or case bronze fittings; Solder only—no braising. Piping system pressure ratings shall have pressure rating of 150 psig. Systems shall be designed to maintain a minimum velocity of 3 feet per second and assure that there is flow to all portions of the system, including standby units, for a minimum of four (4) hours each day. Condenser water range will be a maximum temperature of 85F during the summer and a minimum temperature of 45F during the winter. A three-way water-regulating valve shall be provided for each water-cooled supplemental A/C unit.Dielectric fittings shall be installed at all connections between dissimilar metals.
All new piping connecting to base building systems must be chemically cleaned and passivated prior to utilization of the base building system. Provide a letter indicating the approximate linear feet of each size of copper piper installed.
Piping systems must be pressure tested utilizing treated water. Pressure test shall be performed at one and one half times (150 percent) the working pressure for a period of four (4) hours.
Cleaning and passivation of water piping shall be performed by the building recommended company, utilizing chemicals recommended by the building's chemical treatment company.
All piping systems must be provided with identification labels installed every 20 feet on each pipe and at least once within each room.
All valves shall be 1/4 turn-type, i.e., ball valves, butterfly valves, and lubricated-plug chocks. Ball valves shall be full port design. Access doors must be provided.
Exhaust hoods for kitchens must be the water-wash grease-extraction type, utilizing hot water and cold water.
Fire dampers shall be combination fire/smoke dynamic-type, electrically actuated.
All supply air ductwork serving Tenant space and/or located within the Tenant space shall be insulated.
The Tenant shall be responsible for any acoustical treatment and for the treatment of acoustical problems that may result from equipment located within and serving the Tenant space.
Furniture, equipment, etc., located near the enclosure of the building perimeter induction unit system shall in no way interfere with the operation of and/or access (for service) to the existing piping, valving, and induction units.
All ceiling diffusers shall be Titus and shall be suitable for use with 2' x 2' lay-in ceiling grid. All diffusers with smaller neck size shall be furnished with 24 x 24 ceiling panels.
All ceiling return grilles and/or registers shall be Titus as standard and shall be suitable for use with a lay-in 2' x 2' ceiling grid with light shields.
All supplemental air conditioning units are to be balanced for design flow conditions and reports indicating same are to be submitted to the 386 Park South LLC c/o HSRC Management LLC. Balancing valves (circuit sehers) are to be installed for this purpose that can be marked for the correct amount of opening.
Discharge condensate into sink areas or waste lines only.
Install proper isolation pads or vibration eliminators on all conditioning units.
Locate all strainers for supplemental A/C units at the building riser with proper shutoffs.
Provide insulation for all water and drain piping.
Contractor is responsible for repairing and/or replacing existing A/C units on water riser, which may be damaged during construction.
All ductwork and piping shall be properly secured to the building structure in a manner acceptable to the Owner's structural engineer.
Penetrations and openings through slabs must be approved by the Owner's structural engineer and comply with Section 3 of Structural requirements of this Tenant Design and Alteration Criteria.
Where required forced air forced supply fans for outside air shall connect to building outside air riser with fire/smoke damper and shall contain electric heating oil.
Portable air cooled units are not permitted.

ELECTRICAL

Contact the Building Manager and Chief Engineer before commencing work.
Electric service is supplied from Con Edison at 120/208 volts, 3 phase, 4 wire; a step-up transformer provides service at 480 volts, 3 phase, 3 wire for air conditioning equipment. Available power for Tenant's exclusive use for lighting and office equipment at 120/208V, 3 phase, 4 wire is 6 watts per usable sq. ft.
Tenant branch circuit requirements for lighting and office equipment shall be obtained from the 120/208V, 3 phase, 4 wire panelboard in the core electrical closet. If adequate circuits are not available for tenant's requirements, the tenant shall install additional panelboard(s) in the core Electric Closet with connection to the existing panelboard via incoming line lugs or feed-thru lugs. Any panelboard modifications for these connections are the tenant's responsibility.
Emergency egress lighting and exit lighting shall utilize battery backup.
All conductors shall be copper.
All cable shall utilize one of the following insulation types, as appropriate: THHN, THWN, XHHW.
GFI type receptacles shall be utilized in Toilet Rooms, Pantries, Janitor's closets and similar wet areas.
All electrical feeders and all electrical branch circuits in Electrical Closets, Mechanical Equipment Rooms, Telecommunication Rooms, common areas (lobbies, corridors, etc.) shall utilize one of the following raceways: EMT, galvanized rigid steel, IMC or aluminum.
Branch circuits within the Tenant's demised space may utilize any one of the above raceway types or armored cable.
Conduit systems shall be properly cleaned, neatly arranged and installed parallel to walls. All conduits and raceways in common areas must be concealed.
"Sealtite" shall be used for final connections to mechanical equipment where the environment will be subject to moisture or within fan plenums.
Poke-through floor outlets are permitted in limited quantities. In general, not more than one (1) two-inch penetration is permitted per structural concrete "cell" (including existing penetrations) without specific approval by the Structural Engineer.
All electrical power shall be metered in accordance with 386 Park South LLC c/o HSRC Management LLC standards. Retail to always be sub-metered unless otherwise noted.
All panelboards, switchboards, meters, transformers and disconnected switches shall be permanently labeled. Panel covers and trims must be reinstalled.
All feeders shall be labeled at each pull box, splice box and junction box.
Panelboard loads shall be balanced to within 10% (±5%) of each phase.
Design drawings shall include a load calculation including the following:
- Connected load in watts and volt amperes.
- Demand load in watts and volt amperes.
- Watts or volt amperes per sq. ft. as stipulated in lease.
- Lease allowance in watts or volt ampere per sq. ft. as defined by the lease.
Clean electric closets of all debris and material at the completion of work. Seal any penetrations in slabs or walls with approved fire-rated materials.
Remove wiring abandoned in ceiling including telephone wiring (back to source). Vacuum all ducts and cap open floor outlets.
Penetrations and openings through slabs must be approved by the Owner's structural engineer and comply with Section 3 of Structural requirements of this Tenant Design and Alteration Criteria.
All Fire Alarm System work shall be performed under the supervision of the Building's Fire Alarm System vendor.

TELECOMMUNICATION SYSTEMS

Existing telecommunications cabling and terminations in base building telecommunications closets may be reused where such equipment does not interfere with existing equipment operation, clearance and/or maintenance.
New telecommunications equipment, if required, shall be installed within the Tenant's demised space and not within the base building core area.
New riser cabling shall be installed in the telecommunications riser closets or riser conduits at the explicit direction of 386 Park South LLC c/o HSRC Management LLC. Submit a request for use of risers to 386 Park South LLC c/o HSRC Management LLC prior to preparation of design drawings indicating proposed route, number and type of cables, total cross-sectional area, weight per linear foot, total weight at each point of support, and proposed method/location of support. Floor-to floor cabling shall not be run in base building closets, but shall be routed in separate risers.
All telecommunications cabling shall be approved for use in plenum spaces.
Telecommunication cabling in common areas, Mechanical Equipment Rooms, etc. shall be installed in an enclosed raceway and shall be identified.
Ceiling tiles and light fixtures in public space must be re-installed and damaged tiles must be replaced immediately upon completion of work.
No tenant equipment is permitted in the Building's telephone closets.
Penetrations and openings through slabs must be approved by the Owner's structural engineer and comply with Section 3 of Structural requirements of this Tenant design and Alteration Criteria.

PLUMBING SYSTEMS

All piping systems must be provided with identification labels installed every 20 feet on each pipe and at least once within each room.
All valves shall be 1/4 turn type, i.e., ball valves, butterfly valves, lubricated-plug chocks. Ball valves shall be full port design. Full access shall be provided.
New plumbing to be copper pipe of a size and wall thickness meeting or exceeding legal code requirements and shall originate on the same floor from the nearest wet column with proper access for maintenance. Shutoff valves are to be installed and made accessible.
Insulate water supply pipes to prevent sweating or heat loss.
Waste lines shall be properly pitched and vented to prevent "trapped" water. Install waste line connections with long turn or 45 "Y" fittings.
Retain existing clean-out connections and provide clean-out connections at new fittings.
All ductwork and piping shall be properly secured to the building structure in a manner acceptable to the Owner's structural engineer.

LIFE SAFETY SYSTEMS

Tie-ins to the base building fire and life safety (Class "E") system and any programming associated thereto must be supervised by the base building Class "E" Maintenance Contractor.
Any work requiring suppression of the building Life Safety System must be coordinated, in advance, with the Building Management Office.
Building Management must be notified prior to the use of any burning or welding device or demolition work so that the Life Safety System can be taken "offline." Notification must also be given when work is complete.
Smoke detectors and other life safety devices must be protected when performing work that may cause these devices to become dusty. Protection must be removed upon completion of the work.
Tenant will be fully responsible for any and all false alarms resulting from their work.

FIRE PROTECTION

Existing lot line sprinkler heads must be maintained at west side lot line windows.

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Summer	Outdoor	89° F dry bulb, 73° F wet bulb
	Indoor	78° F dry bulb
Winter	Outdoor	15° F dry bulb
	Indoor	Indoor 70° F dry bulb (no humidity control)

People	One person per 100 usable sq. ft.
Outside Air Quality	0.13 cfm per usable sq. ft. (New York City Ventilation Code)