Our hot water heater is gas, and it only has low med. and high temperature settings. Which setting is the safest to use for our home?
Start at medium, or at the current setting, if you already have it connected.

Go to the nearest hot water faucet, let the faucet run for 3 or 4 minutes.

Put a thermometer into the stream of water. NOTE, your finger is not a thermometer.

If the temp is higher than 115F, then your heater is set too high.

If the temp is under 100F, it will feel warm at best in the shower, it is too low.



In a perfect world, you have a mixing or tempering valve. This lets you mix some cold water with the water coming out of the heater, allowing you to get 'baby bear' temperature - just right.