Easy way to check levels (in winter). Put the level on an area of water that has frozen. I learned years ago that many cheap levels are NOT level and one of my projects is not "on the level".
I also like levels that have a resolution of < 0.01 degree. These are not found at Lowes/HD/Menards, etc. These higher resolution levels have two bubbles - a coarse one and one that has a tiny curve - and that tiny curve gives you accuracy and precision.
Yeah they cost a bit more, but a good level lasts.
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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