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.
BTU stands for 'British Thermal Unit' and is a measurement of energy. One BTU is approximately the amount of energy required to heat one pound of water from 39Â°F to 40Â°F. BTUâs are commonly used to measure and compare the heat output of different hot water radiators.