Curt Birchall writes:
"I could not be happier with the outcome of my furnace project. I plan to install another furnace this summer in a rental house I own to replace the 65% efficient monster that currently resides there! Your support and instructional materials made all the difference. The installation I did was neater and more professional than the original installation, and the furnace works great and has saved me at least $50/month in fuel costs this past winter. That's a savings of over $200 in one heating season."