This article explores the new macro designer and other new macro features available in Access 2010. After reading this article, you will be able to take full advantage of what Access 2010 macros have to offer.
Rules For Sizing Your Heat Pump Pool Heater. 1  Size at 4 BTUâs per gallon or 1 BTU per litre of water. To heat in normal summer conditions when ambient air temperature average 70Â°F in a 24 hour period.  Size at 5 BTUâs per gallon or 1.3 to 1.5 BTUâs per litre of water.
Units you need to know. 1  Btu or BTU: A basic heat unit is the British thermal unit, variously abbreviated as BTU or Btu. It's the amount of energy needed to cool or heat one pound of water by one degree Fahrenheit, and is approximately the amount of heat put off by burning a single wooden match.