Is the $1,500 tax credit available for each product? Can I get $1,500 for windows and another $1,500 for a new HVAC system? Can I get $1,500 in 2009 and another $1,500 in 2010? Even if you purchase multiple products you can only get a maximum of $1,500 over the 2-year period (2009 & 2010). Basically you can spend … Read more