Other elements we should know? For pricing of boiler repairs, boiler service, or boiler installation and replacement call pro ace heating and air conditioning for expert advice and free consultations. Here’s a picture of louie because he’s ace! Boiler efficiency = power out / power in = (q * (hg - hf)) / (q * gcv) * %. Your neighbourhood boiler installation and repair services! Set the timer so that it produces hot water only during the night this will enable you to.