Nailor Airwaves is your source for content on relevant topics concerning Nailor Industries, Inc. and the HVAC industry. New product releases, case studies, product & project spotlights, employee interviews, trade publication articles, and general announcements are some of the content types you can expect to find in the Nailor Airwaves.
Nailor Airwaves
Filter Use on Fan Powered Terminal Units
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
AHRI Recognizes Nailor for 20+ Years of Success
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
Proper Application of the 59NDR Ceiling 'N' Slot Diffuser
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
UFAD vs. Displacement
Both Underfloor Air Distribution (UFAD) and Displacement Air Distribution are well defined in the 2021 ASHRAE Handbook Applications, Chapter 20, Space Air Diffusion. Generally, the idea for UFAD is to have a well-mixed lower level in the occupied space up to about 4.5 feet above the floor. From the thermocline at 4.5 feet to about 3 to 5 inches from the ceiling is a stratified space. Above the Stratified space, the upper region is the warmest and most polluted air in the room. It is being induced into the return air space or ducts at the ceiling and returned to the air handler. UFAD diffusers are typically designed to mix the space air with the supply air very rapidly to eliminate any uncomfortable areas due to the colder air. Generally, the same amount of air as an overhead fully mixed… Read more
How Ceilings Affect Room Sound Levels
Area SourceWhen a room has a full ceiling stretching from wall to wall, the ceiling isolates the room from the area above the ceiling. Frequently that space above the ceiling is used for the return air path to the air handler. It is also used to mount mechanical equipment, plumbing, electric supplies and lighting. The open space is a separate space from the occupied area below. As such, sound that is generated in the return plenum spreads throughout the plenum and produces an area sound source that emanates across the entire ceiling somewhat evenly into the space below. AHRI Standard 885 describes how the sound from the mechanical equipment is affected as it enters the occupied space. Sound readings in the occupied space will be nearly constant across the entire floor area in the room.… Read more