Hydrochloric acid + bleach → water + table salt + chlorine gas. A nest thermostat costs from £160 up but you may be able to get a deal with some boiler installation packages. Great tips, recipes & projects delivered to your inbox. There are different types of boilers that can be installed in the home, with each type working in a specific manner and having its own cost factors some of the most commonly used boiler types include. Did you find this review helpful? The handle on our.