Originally Posted by orfy
Don't forget I'm talking from 60f to a boil.
I'll have to wait for actual brew day (soon) to get actual times.
Yesterday, I boiled 5 gallons of water for fun, starting at approximately 55 degrees. Actually, I was calibrating a new thermometer. What I noticed was that there was a large amount of condensation on the outside of the kettle until the kettle got quite warm, and the evaporation of this condensation severely reduced the rate of warming. Simply wiping the condensation off made a noticeable difference.
Next time, I shall start with aboput 1 pint in the kettle, and then add more water as it warms up. This should (I hope) prevent the cooling effects of evaporating condensation.