Quote Originally Posted by Martinm210 View Post
In my experience with rad testing, it doesn't matter what the ambient temperature is...as long as it's remaining constant. A slight rise or decline in ambients is what causes problems not the actual ambient.

Buddy notes that he ran the benchmarks for 60 minutes before measurements. That should be good enough for 20C deltas and lower. The higher the delta the longer it takes as you would expect, but an hour seemed to work pretty well in my experience as well.

Only thing I would do is run my first test for a couple of hours until the room ambient rise flattens out then start testing. Rad testing is tedious and extremely time consuming. I could easily waste a weekend on one radiator.
Quote Originally Posted by KingOfsorroW View Post
That is not correct, to say the least. Mora3 temps are extremely dependant on ambients.
I think what Martinm210 is saying is that as long as you are testing rads the ambient does not matter as long as it stays the same. Of course the higher the ambient the higher the temps but that applies to everything. But as long as the ambient stays the same you can compare different radiators by comparing room temperature to water temperature.