This Standard specifies the oil burning water boilers (hereafter referred to as
"boilers") used for hot-water supply, heating, etc. which use kerosene, light oil or heavy
oil as fuel, whose working pressure, is 0.1 MPa or lower and heating surface area is
4 m2 or smaller.
JIS S 3021:2009 Referenced Document
JIS A 9504 Man made mineral fibre thermal insulation materials*, 2017-03-21 Update