Hi Sam, we would just like to let you know how happy we are with the Navien boiler you put in for us back in May. It has been so economical and we have only just ordered our next delivery of oil since you put it in. With our old boiler, we were having to top up the oil every three months! The warmth is the best we have ever had it so it's a great choice from you guys. - Dawn and Andy, Othery
