It's been a few months since we gave you an update. Lots of work going on here at our old (1874!) building. The chimney was in dangerously bad shape and would require an expensive rebuild. Instead, we replaced the 80% efficient furnace with a 95% efficient model. This cooler-exhausting furnace doesn't require a chimney, so we will be able to recoup our costs in a few years by avoiding the expensive re-build of the chimney, and saving on energy costs.
You might notice our new roof is a much lighter color than before. This will result in lower energy use for summer cooling. Bonus: lighter colored shingles last longer!
Finally, while we were waiting for the broken a/c unit to be replaced, we took the plunge and replaced our halogen track light bulbs with LED models. This will also take a few years to recoup the cost, but with bulbs designed to last 10 years or more, we should realize great savings over the long run, not to mention the environmental bonus of saving electricity and cutting down on the heat generated by halogens.
Let us know what kind of sustainable retrofit you are doing and we'll feature it here next month!