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.
A BTU (British thermal unit) is the basic measure of heat/thermal energy. One BTU is the amount of energy needed to raise the temperature of 1 pound of water by 1Â° Fahrenheit. BTUâs are a non-metric unit of measure that is commonly used to rate the heat output of fuels and heating appliances. Most heating systems produce thousands of BTUâs.