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.
A BTU is a unit of energy used globally in heating and air conditioning industries, but not commonly used elsewhere. When used as unit of power, BTUs per hour is the commonly used term that refers to the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. To convert watts to BTUs and vice versa, here are the conversion ratios: