Tank Insulation

Verify tank is not labeled as prohibiting insulation

Verify sufficient space exists to wrap tank

Select an insulation that:

is a minimum of R-10

has a flame spread and smoke development index of 25/450 or less when tested in accordance with ASTM E84 or UL 723

is clearly labeled with R-value

Install insulation according to manufacturer specifications over entire storage tank while ensuring that insulation does not obstruct pressure relief valve, plumbing pipes, gas valves, combustion air intakes, etc.

Permanently secure insulation with minimal compression

Seal all seams and edges airtight using compatible and durable tape

Maintain a minimum clearance of 6" between combustible tank insulation and fuel-fired water heater draft hood and/or single wall metal vent materials

Do not wrap the top of fuel-fired water heaters or cover combustion air intakes

Pre-cut flaps at access plates and label them clearly indicating access purpose

Tape access flaps closed