When your company has been around long enough to have made cannon balls for Napoleon, you probably know a little about metallurgy. De Dietrich Residential Cast-Iron Boilers are less susceptible to the problems associated with pitting, corrosion, and thermal shock. The units can handle return water temperatures as low as 105°F without a tempering valve. The secret is an exceptionally fine-grained "eutectic" cast iron in the exchanger. According to the manufacturer, the good-looking boiler is favored by style-conscious Europeans because their small homes frequently require placing the heating plant in the kitchen, where it's always on display. De Dietrich boilers start at about $1,000, minus the burner. Macna/De Dietrich, 866/420-3989, www.macna-dedietrich.com.

Do your customers ever ask for low-maintenance gutters? LeafGuard might be the answer. The one-piece seamless gutter system is roll-formed on site and installed by trained franchisees. According to the manufacturer, the one-piece design provides the best protection from leaves and other debris. With the magic of surface tension, water follows...

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