ACTION REQUIRED:

RETROFIT FOR RS SERIES I UNITS 

Electrical Retrofit and Software Update 

TB: 25-08
Date: Wednesday September 10, 2025
Product Lines Affected: RS Series
                                            Manufactured between
                                            September 2015 & September 2024

Please review the following information carefully, as it concerns product safety and reliability and requires action on your part.

Overview

Our records show that you purchased a Condair RS Series I humidifier unit manufactured between September 2015 and September 2024 ("Affected RS Series I Unit”). Recently, we have identified a combination of age-related and external factors that can lead to conditions which may result in severe electrical damage within the affected RS Series I Unit.  Condair has received no reports of the conditions leading to any damage beyond the Affected RS Series I Unit or causing any injuries.

To mitigate these risks, Condair has developed a retrofit kit which should be installed on affected RS Series I Units no later than the next scheduled maintenance or February 28th, 2026 whichever is earlier.  Failure to complete these upgrades in a timely manner increases the risk of severe equipment failure.

Additionally, a software update has been developed for all RS Series I and RS Series II units, which improves water level management.  It is recommended that this update is installed on all units during the next scheduled maintenance as well.

Summary of Retrofit Kit & Updates Described Below

Why These Retrofits & Updates Are Important

GFCI Board:

This board helps detect ground current leakage and automatically shuts the unit down to help prevent serious electrical damage and other electrical hazards.

Copper Lugs on SSR – For Precision Units Only:

Adding copper lugs improves wire connections to the SSR, reducing the likelihood of wire strand separation and overheating.

Software Update:

Adds cycle counters to track contactor usage and warn when replacement is due. Helps plan maintenance and avoid unexpected downtime.

Introduces daily float test to detect issues with floats becoming stuck, reducing the risk of false water level readings causing the water level to drop below minimum safe levels as the humidifier operates.

Impact on RS Series II

The RS Series II model (launched in September 2024) already includes the GFI board and copper lugs as standard features and do not require electrical retrofits. The software update is still strongly recommended for units produced between September 9th, 2024 and August 2025 for the reasons stated above. A separate technical bulletin will be circulated to RS Series II model owners with instructions for the software update.

How to Identify RS Series I & RS Series II Units

Affected RS Series I Units
(Sept 2015 – Sept 2024)

RS Series II Units
(Sept 2024 – Present)

Affected RS Series I Units Requiring
Electrical Retrofit

The following affected RS Series I Units require electrical retrofit:

Affected RS Series I Units - Action Required

Affected RS Series I Units must be retrofitted with the GFCI board, SSR lugs, and software.

As we lack information as to the identity of any contractor and/or the end-user for the affected RS Series I Units, a Condair representative will contact you with a list of affected RS Series I Units on record that were sold to you, including the following information:

We would ask that you check your records. If you believe you purchased other Affected RS Series I Units, please let your Condair representative know.

Ultimately, this bulletin should be provided to whomever is currently responsible for the maintenance and upkeep of each affected RS Series I Unit. If that is you, please follow the “Steps to Perform” below. If that is not you, please provide a copy of this bulletin to your contractor and/or the end user. If you provide to the contractor, please instruct them to provide a copy to their end customer.

Steps to Perform

Whomever is currently responsible for the maintenance and upkeep of each affected RS Series I Units should promptly order a Retrofit Kit from Condair. The Retrofit Kit is provided at no cost and one is needed for each unit. The Retrofit Kit can be requested by emailing Condair’s Warranty Department at na.warranty@condair.com through a standard warranty process. The RMA form for this retrofit work can be found here.

Condair will then send a Retrofit Kit to the registrant. Once received, the Retrofit Kit comes with complete parts and instructions and the following steps will be taken:

Retrofit Compensation/Credit

Condair will provide $200 USD / $300 CAD per retrofitted affected RS Series I Unit to cover labor for the work. Condair will apply the credit to your account after confirmation is received of completion of the retrofit work. To the extent, the work is performed by a contractor or end-user without your involvement, you must transfer the credit to the contractor/end-user.

If placing an order for maintenance spare parts, please make sure to include the retrofit parts as well. Kindly note that retrofit kits can only be ordered through warranty.

We will also be scheduling a short webinar to address any questions you may have regarding the retrofit work. Please keep an eye out for the webinar invitation email in the coming days.

Important:
The serial number registration and proof of completion is mandatory to receive the credit. No compensation/credit will be issued without proper registration and proof of completion.

Summary

The RS Series I Retrofit
1. GFCI board and lugs on affected Units (see below)

2. Software update on ALL the RS Series I units

Important Part Number & Links

Should you have any questions, please reach out to the Technical Product Manager undersigned.

At Condair, we pride ourselves on designing and manufacturing innovative, reliable commercial humidification products and solutions. We understand and apologize for the inconvenience to you, but want to do our best to ensure that you do not experience any unexpected service interruption, downtime and damage. We thank you in advance for your anticipated cooperation to address this issue and look forward to seeing you at the upcoming webinar to discuss this technical bulletin.

Sincerely,

Sagar Shah
Technical Product Manager
Office: +1 613 822 0335
sagar.shah@condair.com