Surveyor was very informative about the product and advised us on the most suitable wall to have the heater installed. He also advised us on the most suitable programme to meet our needs (we are using our conservatory as a dining room). However, his estimate of the daily costing, (approx 50pence per day)based on the programme he advised, is just impossible. The fitters arrived on time, were very polite and again explained how to set the programme, and left no mess. Whilst this heater may be a little more expensive than other such products, it is well worth the money and we are pleased that we chose Fischer.