I wanted to touch base with you on the insulating job you did for us last year. We still have no air conditioning and through all the heat we have had of late, when the outside temperature is over 90 degrees it has never gone over 75 degrees in our home! Great job! Thank You.
Tina & Rick Lemke

To Whom it May Concern:
In a previous year you did the insulating job at my new duplex at 850/852 Smits Street in East DePere, WI. At that time I told you I would try to write you comparing the costs at my old house located right next door to the new one.

For the period of 12/21/00 to 1/31/01 the gas bill at the new house was $129.89. For the same period the bill at the old house was $263.00. For the period 1/23/01 to 2/21/01 the gas bill at the new house was $107.57 and $189.89 at the old house. For the period 2/21/01 to 3/21/01 the bill at the new house was $110.60. At the old house for the same period it was $136.83. For the last two of the periods, I had turned the heat down to 57 degrees at the old house while the new one was kept at 68 degrees.

Shirley Schoen

Dear Frank's Energy Savers:

I am writing to present our draft report relative to the test conducted at 2330/32 and 2344/46 Cedar Ridge Court.

The performance of an insulation system consisting of wet-spray cellulose wall and loose fill cellulose ceiling insulation (referenced here as "dense insulation") was evaluated. The dense insulation was compared to a "standard insulation system" consisting of fiberglass batt wall insulation and loose fill fiberglass ceiling insulation. The insulation systems were installed in identical duplexes constructed by Total Services Development during the spring and summer, 1991.

The cellulose insulation was installed by Frank's Energy Savers. The incremental cost of the wet spray cellulose, $600, was underwritten by Wisconsin Public Service as a test and evaluation project. The primary objective of the project was to evaluate performance of wet-spray wall insulation and the impact on a structure's air tightness and energy use.

Blower-door tests to measure uncontrolled air movement through the structures, infra-red imaging, interviews with the occupants and utility billing data analysis were conducted in January, 1993. There is debate on how well wet-spray cellulose will perform over time. Our measurements were postponed until the second heating season, allowing the insulation system to "settle."

Summary of Results
- The dense system duplex is tight, it measures 32% less uncontrolled air infiltration compared to the duplex with standard insulation.

- The thermal performance of the dense insulation system was superior to the thermal performance of the standard insulation system. No weaknesses were observed in the dense system, no evidence of any settling. Surprising weaknesses were discovered in the standard insulation duplex during infra-red imaging.

- Heating energy use in the densely insulated duplex was 33% less ($285) during the period from September, 1991 until November, 1992, compared to heating energy use in the standard insulated duplex. The heating energy pattern has remained consistent, over the last 12 month period, heating energy consumption was 36% less in the duplex with the dense insulation system.

- There were no consistent air conditioning patterns to evaluate air conditioning performance and energy use based on electric energy billing data.

- For these duplexes, the simple payback at today's natural gas prices and under normal weather conditions is 2.13 years. The payback represents the length of time to recover the $600 cost of the dense insulation with reduced heating energy expense. This represents a simple return on investment of 47%.

Application Considerations
- Application of dense packed insulation systems make energy and comfort sense. Properly applied, they should pose no structural concerns and may improve the structure's durability.

- Because the dense systems impact air movement through a structure, attention to controlled ventilation for occupant comfort and careful planning for combustion appliance operation is important.

Enclosed are details and photos of the infra-red images associated with our review. The project summary is in draft form and will include construction, occupant lifestyle, building orientation, and other details.

Your comments would be appreciated, please do not hesitate to contact me with any questions that may arise, my office phone is (414) 433-1185.

Thank you for your interest and willingness to investigate emerging energy efficient technology.

Very truly yours,
John Boudreau
Technical Services Coordinator

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