Director's Advisory FS-187-11 - Navien Instantaneous Hot Water Heaters

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You can download the Director's Order FS-187-11 - Here

Section 4.5.2 of the CAN/CSA-B149.1-05 – "Natural Gas and Propane Installation Code" states that the use of any gas-fired appliances, accessories, components and equipment shall be prohibited where a hazard is created.

It has been brought to the attention of The Technical Standards and Safety Authority (TSSA) that the connection between the vent collar and the vent pipe on a limited production run of instantaneous (tankless) water heaters manufactured by Navien may not have fused properly during the installation. The affected water heaters were manufactured between February 29, 2008 and December 31, 2008. These water heaters were supplied with a vent collar fabricated from Nylon 66 material. The manufacturing year can be determined by the 16 digit serial number. Letters 5 through 8 identify the year, example XXXX2008XXXXXXXX.

Any connection of the venting system not properly fused has the potential to expel flue products into the living space. These flue products may include Carbon Monoxide (CO).

CO is a colourless gas produced when fuels such as natural gas, propane and oil burn incompletely. CO itself is odourless and tasteless but may be accompanied by an abnormal odour of incomplete fuel combustion. Symptoms of CO poisoning include nausea, vomiting, dizziness, burning eyes, difficulty breathing, confusion and loss of consciousness.

All Navien water heaters manufactured between February 29, 2008 and December 31, 2008 currently installed must be re-inspected to ensure all joints of the entire venting system are properly fused. If any joint is not properly fused corrective action must be taken immediately. The findings and corrective action taken for all water heaters inspected must to be reported to Navien.

Additional Information
Refer to attachment #1 for an important notice regarding these water heaters.