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.
If you are trying to heat a pool/spa combo, a 400 btu pool heater (the Big Boy) is usually used for fast (15 - 30 minutes) heat up of the spa. Using a spa solar blanket cover can reduce the heat up time by a few minutes.