Combination Boiler Heating Controls Installation This Old Worcester Bosch Combination boiler was installed a good 15 years ago but never had Central Heating Controls fitted! As this property was and had been rented out for a few years, the new tenants pointed out the lack of controls. I bought and installed a simple wireless setup made by Salus. It does the job where you can control heating 4 times a day and a different setup at the weekend. I installed the actual control in the hallway where the radiator had no thermostatic control valve. All works well and all parties are happy.