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 British Thermal Unit (BTU) is an approximation of the amount of energy required to heat 1lb (one pound) of water from 39Â°F to 40Â°F (degrees Fahrenheit), and is roughly equal to 1.055 KJoules.Simplified, 1 BTU is roughly the amount of heat produced by burning a single wooden match.irst you need to calculate the cubic volume of your room (in feet or metres) by multiplying the height, width, and length of the room (done for you with our free calculator).