Financial Payback:
1 - Very poor. Takes 15-20 years to pay for itself.
2 - Poor. Takes 10-15 years to pay for itself.
3 - Good. Takes 7-10 years to pay for itself.
4 - Very good. Takes 3-6 years to pay for itself.
5 - Excellent. Takes less than 3 years to pay for itself.Difficulty of Installation:
1- Anybody can do it.
2 - Someone with basic handy person experience can do it.
3 - An advanced handy person can do it.
4 - A handy person can do a significant part of it along with the assistance of an experienced professional.
5 - Best to leave it up entirely to a professional installer/licensed contractor.Environmental Impact:
1 - Very little. Very little effect on your consumption of non-renewable resources, does little reduce greenhouse gases. May have some secondary minor negative effects on the environment.
2 - Little. Has a small amount of impact on the reduction of greenhouse gases and/or the reduction of non-renewable resources. May have some secondary minor negative effects on the environment.
3 - Some. Has a moderate amount impact on the reduction of greenhouse gases and/or non-renewable resources. May have some secondary minor negative effects on the environment.
4 - Strong. Has a significant impact on the reduction of your homes production of greenhouse gases and/or consumption of non-renewable resources. It's existence has no significant negative effects on the environment.
5 - Very strong. One of the best technologies for reducing your homes production of greenhouse gases and/or consumption of non-renewable resources.