1 In the Format Cells dialog box, click Color, and then click the White square. 2  Click OK in the Format Cells dialog box, and then click OK in the Conditional Formatting dialog box. 3  Note Because you selected column A in step 2, all the cells in column A were formatted with this conditional format. In the Format Cells dialog box, click Color, and then click the White square. 2  Click OK in the Format Cells dialog box, and then click OK in the Conditional Formatting dialog box. 3  Note Because you selected column A in step 2, all the cells in column A were formatted with this conditional format.
With maintainance a boiler should last 15 years. A combo boiler is used more than any other boiler because of constant demand.A heat exchanger replacement you have to consider age and shape of unit.ith maintainance a boiler should last 15 years. A combo boiler is used more than any other boiler because of constant demand.
How long do tankless water heaters last? Tankless water heaters typically last 15 to 20 years, compared to 10 years or less for a tank-type water heater.If there are very hard water conditions, water treatment will be important in maintaining the life of the water heater.ow long do tankless water heaters last? Tankless water heaters typically last 15 to 20 years, compared to 10 years or less for a tank-type water heater.