Yes, if the plastic is at least 0.036 inch thick and has a flame spread index of 25 or less and a smoke-developed index of 450 or less.
Where a pan is required it must be at least 1.5 inches deep with a 3/4 inch drain. If there was never a pan drain, Mansfield’s amendment does not require one for a replacement heater.
For occupied homes, the city inspects by video call once the replacement is complete, between 9 a.m. and 4 p.m.
Yes. After an air gap in the same room as the heater, Mansfield’s amended code lets it discharge to the pan, the floor, a waste receptor or outdoors.
It can. If a gas heater that is neither direct-vent nor power-vented sits inside the air barrier, any exhaust system over 400 cubic feet per minute needs makeup air under Mansfield’s amendment. With sealed-combustion, power-vent or electric appliances throughout, the limit rises to 600.