# Manufacturer or Product Substitution in Division 23 Heating, Ventilating, and Air Conditioning (HVAC) submittals

> Source: https://deviationcheck.com/divisions/23-hvac/manufacturer-substitution/

The submittal proposes a different manufacturer or product than the spec names, without an approved or-equal or substitution request.

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

HVAC specs routinely name basis-of-design manufacturers (Trane, Carrier, Daikin, York/Johnson Controls, Lennox, McQuay) with model series. Submittals proposing alternate brands must provide "or equal" documentation. Look for:
- Chiller, RTU, or AHU manufacturer/model substitutions
- VAV box manufacturer changes (Titus, Price, Krueger, Nailor)
- Controls manufacturer substitutions (Honeywell, Johnson Controls, Siemens, Distech)
- Duct insulation or pipe insulation brand changes
- Pump manufacturer substitutions (Bell & Gossett, Grundfos, Armstrong)

## Severity

Default grade: Blocker. Drops to a Note if the submittal attaches an or-equal approval letter from the architect of record.