1. Insulation selection

• Minimum R-Value of R-10. 

• Has a flame spread of 25/450 or less when tested in accordance with ASTM E84 or UL 723. 

• Clearly labeled with R-Value

2. Cut and fit insulation 

• Cut and fit blanket to allow for maximum continuous insulation of tank. 

• Fold the top 4" of the insulation blanket down so top edge will be finished with vinyl facing. 

• Leave insulation exposed at bottom to allow insulation to dry. 

3. Electric DWH: insulate top 

• For ELECTRIC water heaters ensure you cover top of tank with insulation. 

• For gas water heaters DO NOT cover top of tank, this can obstruct the draft diverter. 

4. Maintain clearance from gas valve and combustion chamber 

• Maintain a minimum of 2 inches away from gas valve and burner access panel. DO NOT install insulation below burner access panel.  

• 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

5. Do not cover PTV 

• Do NOT cover the pressure temperature relief valve or discharge line with insulation.

•  IF relief valve exist but no discharge line. Install discharge line outside the insulation within 6 inches of the floor 

6. Electric DWH: Cut access panels 

• For ELECTRIC water heaters mark insulation to locate thermostat and heating element access panel. 

• Cut bottom and sides but NOT the top. This will create a hinge that allows access to these panels 

• Use tape to create a finished edge leaving no exposed insulation.

7. Secure with ties 

• Install nylon straps (like zip-ties) over the insulation within 6 inches of the top and bottom and one in the middle of the tank with minimal compression.