- Homeowner income qualification for 50/50 incentive; total outlay reduction.
- Furnace was Oil; savings opportunity and easy SIR qualification for 50/50 (furnace, 98% efficient water heater, 3 windows, bath fan, and dryer vent improvements were all able to meet SIR and qualify for incentive).
- RG&E incentive for converting from oil to gas; total outlay reduction.
- Equipment was old and would need replacement anyhow; no accelerated depreciation necessary.
- Equipment was over sized and inefficient; savings and comfort opportunity.
- Natural gas billing charge already; billing convenience & economy to scale opportunity.
- House needed a new roof; adding spray foam to roof job offered job scale savings opportunity.
There were some challenges to performing the financial analysis. Since Oil was the energy source and the oil company did not fill on a regular basis it was somewhat difficult to determine annual BTU usage.
Originally I attempted to break usage down to BTU per Heating Degree Day, but that ended up being much more complicated than necessary and I settled for average annual oil usage over a 7 year period:
The spray foam insulation reduced her Oil use for about 2 of the 7 years by roughly 35% (this we estimated after she had her tank pumped last year). So the oil use total actually understates the results of my recommendations because the spray foam was completed in the summer of 2006 and the calculated average was through December 2007.
Below is a list and some before/after pictures of some of the improvements:
- Carrier Infinity 3 stage furnace with variable speed ECM blower, 95% efficiency rating.
- Navien 98% efficient on-demand water heater with buffer tank, pump and insulated external recirculation lines.
- Spray foam to roof.
- Panasonic automatic bath fan vented to exterior.
- Dryer vent hard piped to exterior
- New gas line.