CSA ANSI Z21.23a-2003 (R2005)

CSA ANSI Z21.23a-2003 (R2005) PDF

Details test and examination criteria for integral gas valve type and electric type thermostats which are used as integral parts of gas-burning appliances. It presents minimum levels for the substantial and durable construction, safe operation and acceptable performance for such thermostats. The standard does not apply to wall-mounted thermostats for comfort heating control.