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Nailor News 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.

AHRI Recognizes Nailor for 3 Years of Success

April 22, 2021

By: Matthew Crump, PE

The American Society of Heating Refrigeration and Air-Conditioning Engineers (ASHRAE) has developed standards that the industry uses to test their Terminal units (ASHRAE Standard 130) and Fan Coils (ASHRAE Standard 79).  These documents outline the standard procedure for testing each piece of equipment.  Standard 130 outlines terminal unit pressure drop and sound testing, while Standard 79 covers fan coil airflow and cooling/heating capacity testing.  Nailor performance data published in our selection...

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VAV Diffusers: The solution to some issues but the cause of others?

April 19, 2021

By: Matthew Crump, PE

Over-cooling in the summer or over-heating in the winter can impact occupant comfort. There are several solutions for this issue. These include rebalancing the system, adding Terminal Units for those spaces, or adding a VAV Diffuser. The use of a VAV Diffuser requires an understanding of the design, how they work, limitations, and system considerations associated with the product.

VAV Diffuser

The Nailor UNI VAV diffuser enables the control of airflow into a room with a connected...

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VAV Equipment Selection: Fan Powered Terminal Units

April 6, 2021

By: Matthew Crump, PE

In many VAV systems, the exterior zones will utilize fan-powered terminal units. When compared to a single duct terminal unit, the fan-powered versions have a fan that enables the induction of plenum air into the airflow. During heating, the supplied conditioned air can be reduced to the minimum ventilation rate and the heating airflow is supplemented by induced plenum air. The introduction of the fan adds a few more variables to consider when selecting the equipment.

Parallel vs. Series

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VAV Equipment Selection: Single Duct Terminal Units

March 23, 2021

By: Matthew Crump, PE

Once the building cooling/heating load has been calculated and the VAV system has been laid out, the next step is for the engineer to select the exact sizes, models, and configurations of the terminal units that will deliver the comfort to the space. For both the single duct and fan powered terminal units, several variables must be considered including unit capacities, sound, type, heating requirements & type, and manufacturer.

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VAV System Design Considerations

March 2, 2021

By: Matthew Crump, PE

A mechanical engineer must consider several variables and equipment types when designing a VAV system.  This includes the load on the space, the static pressure in the ductwork, the types of terminal units, and the occupancies in the space.  The engineer must also consider how the terminal units are going to be controlled.  These decisions must weigh the initial cost with the long-term energy efficiency. Using a theoretical office building, we will walk through the general design process and the decisions the...

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