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ELK RIVER ARENA <br />ELK RIVER, MINNESOTA <br />APRIL 8, 1998 <br /> <br />FEASABILITY STUDY <br /> <br />The desiccant unit is typically installed outside the arena, either on the ground or on the roof of <br />the building. The units can be located inside the building if space is available. The location of <br />the unit will need to be determined during the design of the system. We recommend installing <br />distribution ductwork above the bleacher side of the arena to distribute the dry air throughout <br />the building. The following factors will be considered when determining the location of the <br />unit: <br /> <br />1. The location of the unit with respect to residential buildings. We will need consider the <br /> noise impact on the neighbors, especially on the north side of the arena. <br /> <br />2. The location of the existing gas meter and piping. <br /> <br />3. The structural capacity of the existing building. <br /> <br />4. The proximity of the unit to the ductwork distribution system. We prefer to distribute the <br /> supply air along the bleacher side of the arena. <br /> <br />COST ESTIMATE: <br />The cost estimate to complete the installation will vary significantly depending on the final <br />design of the system. To prepare our cost estimate we have assumed that a new desiccant unit <br />could be located on grade, or on the roof near the resurfacer room of the new arena. Ductwork <br />has been extended the length of the arena over the bleachers. We have a preliminary estimate of <br />$108,000.00 to complete the installation of the dehumidification system. The estimate includes <br />engineering fees to complete the design of the system. <br /> <br />MINNEGASCO REBATES: <br />Minnegaso offers rebates for the installation and design of desiccant based dehumidification <br />systems. The following rebate programs are available: <br /> <br />A rebate of $90.00 per offset ton of refrigerant based dehumidification is offered for the <br />installation of desiccant based dehumidification. <br />A rebate of $20.00 per offset ton of refrigerant based dehumidification is offered for the <br />engineering of desiccant based dehumidification. <br /> <br />The rebates are both based on offset tons of refrigerant based dehumidification systems. We <br />have estimated a moisture removal requirement of approximately 400 lbs/hr. A typical 10 ton <br />refrigerant based dehumidification unit similar to the units installed at the facility will remove <br />17 lbs/hr of water vapor from the arena. We have estimated the total offset tonnage for the <br />arena to be approximately 200 tons. <br /> <br />The preliminary rebate estimate based on the installation of a 400 lb/kr desiccant <br />dehumidification system will amount to an $18,000.00 rebate for the equipment installation, <br />plus a $4,000.00 rebate for the engineering rebate. The total estimated rebate for the system <br />would be $22,000.00. This is a preliminary estimate that will need to be confirmed with the <br />final equipment selection. The entire rebate goes to the owner to help offset the costs associated <br />with the engineering and installation of the desiccant dehumidification system. <br /> <br />NELSON-RUDIE & ASSOCIATES, INC. Page 7 <br /> <br /> <br />