Challenge: Food and beverage plants require significant amounts of steam/water on demand for process equipment and cleaning. Just as pasteurization, sterilization and washdown systems are critical to ensuring profitability, so are the steam and water boilers that serve those systems. Reliability is critical as downtime is costly.

Solution: McCotter HVAC worked with Miller Brewing Company engineers on the design and application of five 30,000,000 BTUh Sellers Immersion Fired Boilers to serve their pasteurizers. The Sellers gas fired units are serviceable and provide the volume of water required for the pasteurization process. The boilers have been operating reliably since 1974.

Challenge: Green Bay Packaging uses steam to heat large quantities of make-up air. However, modulating steam for temperature control left systems susceptible to freeze up. Reliability and freeze protection are critical to ensuring that time and money can be allocated toward revenue generating pulp and paper machinery, not ancillary heating and ventilating systems.

Solution: Green Bay Packaging uses a combination of built up and pre-packaged air handling units containing Wing VIFB coils. Wing VFIB steam coils are installed as they provide the most freeze protection commercially available. McCotter HVAC provides heating, ventilating and make-up air equipment designed specifically for pulp and paper mill applications.

Challenge: Hospitals require substantial amounts of ventilation and make-up air in order to maintain acceptable indoor air quality. This practice proves costly as significant amounts of conditioned air are discharged from the building.

Solution: The proper application of energy recovery equipment can significantly reduce energy costs while maintaining indoor air quality. McCotter HVAC has been working with engineers to properly design and apply energy recovery systems since the early 1970's. Our energy recovery wheel installations at St. Michael Hospital in Milwaukee, Wisconsin are are an example of one of several energy recovery options available.

Challenge: Heating and ventilating a distribution center presents a unique set of challenges. Typically, distribution centers are very large with high storage racks, making air distribution ducting costly and ineffective. Loading docks with multiple truck doors creating heating load swings. Protecting product and maximizing worker productivity are key issues when designing for distribution facilities.

Solution: McCotter HVAC can apply a number of proven systems to meet the requirements of any distribution center. Five large air turnover units were installed to heat 1.2 million square feet at the Target Distribution Center in Oconomowoc, Wisconsin. E-Z PAINTER Co. of St. Francis, Wisconsin uses Wing door heaters to ensure worker comfort and productivity year round.

Challenge: Wastewater treatment plants create digester gas which is suitable for combustion. However, burning the waste gas is difficult as digester gas supplies fluctuate considerably. A constant flow is rarely available. In addition, the BTU contents of the natural and digester gases differ.

Solution: McCotter HVAC has extensive experience in the design and application of burner/boiler packages for digester gas. Gordon-Piatt combustion burners with auto fuel changeover systems were installed at the Wausau WWTP. The burners fire on digester gas until supplies are depleted. The burners automatically switch to natural gas until a suitable supply of digester gas builds up, at which time they convert back to waste gas.

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