Shares & Saves. Save. The British thermal unit, or BTU, is a unit of energy, one that is used to quantify the heating and cooling power of, water heaters, air conditioners and similar equipment.hares & Saves. Save. The British thermal unit, or BTU, is a unit of energy, one that is used to quantify the heating and cooling power of, water heaters, air conditioners and similar equipment.
Winter squash includes acorn squash, spaghetti squash, butternut squash, delicata squash, hubbard squash, kabocha squash, turban squash, sweet dumpling squash, and of course all types of pumpkins. Prepared winter squash also freezes well and keeps for about 6-8 months in the freezer.
Step 4. Check on your winter squash often. Once they begin to soften, they should be used immediately. Depending on which kind you have, expect acorn squash to stay fresh for 5 to 8 weeks, butternut squash to stay fresh for 2 to 4 months, and turban and buttercup squash to stay fresh for 3 to 6 months. References.