Carry the insulation to expose the heating factor. Keep the insulation on to the tank with sellotape. Immediate vent water heaters attract air for combustion from the outside of your home. Exhaust gases and excess warmth are then vented back again outside. For more in-depth information on sorts, see in https://leakfixsolutions.com/top-10-plumbing-repair-services-access-denied-for-top-notch-repairs/