CSA ANSI Z21.23b-2005 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.
$150.00
$80.00
$279.00
$45.00