Pre-heating the water does more to remove dissolved gases than aging. I have a 125 gal tank and 60 gal barrel for water preparation. The first batch is often aged quite a bit as it has leftovers from the last water change. The 2nd batch is only aged long enough for my battery of heaters to bring it to aquarium temperature, usually just a few hours. I do refill in stages though rather than blasting it all in there at once.