Landmark Restorations designed a retrofit window system that included high-performance glass with sound control energy-efficient qualities for the Morgans Hotel in New York City. The report below explains the process and results of the project.
The Morgans Hotel is an 18-story building located in Midtown Manhattan. The exterior of the building consists of brick veneer, double-hung windows, and vents for the air condition units.
Street noise entered the guest rooms through the existing windows (1/4” thick glass) and through openings at the perimeter of the vent for the air conditioning unit (ptac). Air infiltration also occurred in the ptac cabinet and at the meeting rails of the windows, contributing to heat gain/loss.
- Reduce level of street noise entering the guest rooms.
- Increase the energy efficiency of the building envelope.
Scope of Work
Leaving the existing window system in place, Landmark Restorations designed a secondary window system that fit behind the existing interior window. The new system incorporated sound control glass with an energy-efficient low-e coating. The secondary system did not change the appearance of the building from the street. At the interior the windows have a simple modern aesthetic complementing the guest room décor.
Sound control insulation was added to the cabinet beneath the windows that houses the air condition unit (ptac) to limit sound and air infiltration.
The project was executed in two phases. Phase I consisted of adding sound control insulation to the ptac cabinet and building out the sill of the existing window pocket in order to receive the new window system.
Phase II involved installing low-e and sound control glass.
Results after Installation
High 85+ dB
Sound levels inside guest rooms dropped 35dB on average after retrofit installation.
Interior air temperature on a 16-degree day with heat off for 2 hours.
Guest room temperature: 72 degrees
Window Frame temperature on a 16-degree day.
Before: 33 degrees
After: 68 degrees