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.
1 If you want to swap a regular boiler with a combi boiler unfortunately there will be a lot of pipework changes needed (although you will be doing away with your hot water tank!), so the price to buy and fit this type of boiler starts at about Â£1800.n addition it depends on what type of boiler you had originally and what type of boiler you are swapping to. On the whole there are two types of boiler â a regular boiler (with the hot water tank) and a combi boiler that makes hot water on demand (without a hot water tank).