Division 23 Heating, Ventilating, and Air Conditioning (HVAC)

Aesthetic Deviation in Division 23 Heating, Ventilating, and Air Conditioning (HVAC) submittals

By Deviation Check Editorial Team. Last reviewed June 1, 2026.

Short answer

A visible attribute (color, finish, texture, profile) differs from the spec or the architect-approved sample. Default grade in Division 23 Heating, Ventilating, and Air Conditioning (HVAC): Fix and Resubmit.

A visible attribute (color, finish, texture, profile) differs from the spec or the architect-approved sample. This guide covers how it shows up specifically in Division 23 Heating, Ventilating, and Air Conditioning (HVAC) submittals.

What to look for in Division 23 Heating, Ventilating, and Air Conditioning (HVAC)

Less common but applies to:

  • Exposed ductwork finish (spiral duct color in exposed-ceiling designs)
  • Diffuser and grille face style, color, or pattern
  • Thermostat/sensor color and style for occupied spaces
  • Equipment screen/louver color for rooftop equipment visible from grade
  • Decorative return air grille patterns

Common examples in Division 23 Heating, Ventilating, and Air Conditioning (HVAC) submittals

Aesthetic deviations in Division 23 are easy to wave through because they pass the performance check, yet they are exactly what the architect and owner notice on a walkthrough of a finished space.

  • Confirm diffuser, register, and grille face style and finish match the schedule and the architect-approved sample - white, off-white, a custom RAL color, or clear/mill aluminum - not just "supply air diffuser, 24x24."
  • On linear slot diffusers, check slot count, frame style, and that the submittal addresses continuous-run alignment and end-to-end color uniformity across joined sections.
  • Verify louver finish and color on architectural louvers, especially a specified PVDF (Kynar) coating in a named color versus a substituted baked enamel or anodized finish.
  • For exposed-structure ceilings, check the spiral or round duct finish called out - paint-grip for field painting, factory-painted, or double-wall - and that exposed seam orientation and hanger type read as intended.
  • Match thermostat, wall sensor, and VRF/ductless indoor head color and form factor to the occupied-space finish; a white wall unit on a dark feature wall is a callout.
  • Confirm sidewall versus ceiling diffuser locations and return-air grille pattern track the reflected ceiling plan, not the mechanical plan alone.

A factory-white linear slot diffuser shipped against a spec calling for a custom bronze finish is a reject on aesthetics even when airflow and NC rating are dead-on.

How severe is it?

Default grade: Fix and Resubmit. Owner-sensitive; the PM confirms against the approved sample before accepting.

Deviation Check assigns a default per category and escalates or de-escalates based on the spec, always showing its reasoning. See the Division 23 severity rules.

What the PM should do

Stamp the submittal Revise and Resubmit. Mark the deviation, return the relevant spec passage as a redline, and have the sub correct and re-send before fabrication or installation.

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Frequently asked questions

What visible attributes on Division 23 HVAC submittals can trigger an aesthetic deviation flag even when all performance numbers are correct?

Diffuser and grille face style, color, and pattern are the most common triggers - a factory-white linear slot diffuser shipped against a spec calling for a custom bronze finish is a reject on aesthetics regardless of airflow or NC rating. Exposed spiral duct finish, thermostat and wall sensor color in occupied spaces, and rooftop equipment screen and louver color visible from grade are also reviewed against the architect-approved sample.

How should a PM verify a diffuser or grille finish submittal against the spec in Division 23 HVAC work before accepting it?

Confirm face style and finish match the equipment schedule and the architect-approved sample - not just the generic description 'supply air diffuser, 24x24.' For linear slot diffusers, check slot count, frame style, and that the submittal addresses continuous-run color uniformity across joined sections. For architectural louvers, verify the coating type is correct - a specified PVDF (Kynar) finish in a named color is not interchangeable with baked enamel or anodized.

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