Do they offer an after sales service? I currently have an electric boiler which stores hot water once it is heated (no on demand hot water) i want to replace it with an electric combi... We guarantee same day service if you call us before noon! Please enter your name & phone number so holly can call you back. As the owner, i answer the phone personally - monday thru friday… no muss no fuss!!! Find a school & performance stats. Our licensed plumbers have hour availability.