Nailor Airwaves Archive
Fan powered terminal units are designed to deliver reliable zone comfort without the need for terminal‑level filtration during normal building operation. Yet questions around filters continue to surface—most often during construction, when protecting equipment from dust and debris becomes a concern.
Understanding when filters are helpful—and when they are not— can help avoid unnecessary maintenance, access challenges, and long‑term operating costs.
During construction, exposed induction openings can allow drywall dust and jobsite debris to enter the unit and associated ductwork. For this reason, temporary protection is commonly used to help keep equipment clean prior to occupancy. This may take the form of temporary filters or simple covers installed over the induction opening.
Once… Read more...
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has established industry standards used to test terminal units (ASHRAE Standard 130) and fan coils (ASHRAE Standard 79). These standards define the procedures for evaluating equipment performance, including pressure drop, sound, airflow, and heating and cooling capacity. Nailor’s published performance data, found in our selection software and product catalogs, is based on these standardized testing methods.
The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) works alongside ASHRAE to develop rating standards and verify manufacturer performance. Through AHRI certification programs, manufacturers submit equipment for ongoing third-party testing. Each year, AHRI randomly selects and tests… Read more...
Achieving consistent comfort and dependable performance at the building perimeter requires more than selecting the right diffuser—it depends on applying it correctly. The 59NDR horizontal pattern ceiling slot diffuser with vertical down blast is engineered to manage challenging perimeter conditions, particularly near exterior walls and glazing, when installed and adjusted as intended.The following insights are based on Nailor’s original engineering guidance and are intended to help designers, engineers, and contractors apply the 59NDR with confidence while maximizing its performance benefits.
See Engineering Bulletin: 'N' Slot Mounting and Applications for Model 59NDR
Flush Mounting and Alignment for Optimal Performance
For best results, the 59NDR diffuser should be installed in a… Read more...