names the macro. A macro name must be a SAS name, which you supply; you cannot use a text expression to generate a macro name in a %MACRO statement. In addition, do not use macro reserved words as a macro name. (For a list of macro reserved words, see Reserved Words in the Macro Facility .).
0. The General rule in the Northeast part of the country is 35 btu's of heat per sqft ,some guys go 40 but that is on poorly insulated home, cooling load is 18 btu per sqft, so thats how he is doing it and it sounds like he is right your furnace was way to big for your house.
How long does it take to heat my pool? It depends on the size of your pool but a 116 BTU heater will raise 10000 gallons of water about 1.4 degrees per hour. 20000 gallons 0.7 degree per hour.