[rmh47]

1 1/2 gallons of very cold water would have to be heated up from maybe 40 degrees to 98.6 - and that takes a lot of energy. THAT is why you burn more calories over time

By my calculation, raising 1.5 gallons of water 60 degrees F uses about 190 Calories.

That's not huge, but I suppose over time it would add up--provided you did not change the amount you eat to compensate.

Anybody want to check my arithmetic?

Conversion factors:

1 Calorie = 1000 calories
1 degree C = 1.8 degrees F
1 gallon (water) = 8.33 lb
1 lb = 454 gm

[Ancesthntr]

190 calories/day x 365 days = 69,350 calories = 19.81 pounds @ 3,500 calories/pound. Sounds pretty huge to me for doing nothing other than drinking cold water.