Domestic
hot water.

Install it, service it,
and answer at 2am.

A hot water heater is the appliance nobody thinks about until the morning it is cold. There are more choices than most people realise. A conventional tank is cheapest to fit and perfectly good for a lot of houses. A tankless unit heats on demand, never runs out, and takes up a fraction of the space, but it needs the gas supply and the venting to support it, so it is not always a straight swap. An indirect tank runs off the boiler and is often the quiet best answer in a house that already has a good boiler, because one burner does both jobs. And in a house going all-electric, a heat pump water heater changes the running cost significantly. Which one suits you depends on how many bathrooms run at once, whether anybody fills a big tub, what the gas line and flue can carry, and where the unit has to physically go. JSM fits and services all of them, including the removal of an old oil tank and boiler where a house is coming off oil entirely. Maintenance is worth mentioning because it is unglamorous and it is what actually makes these last: flushing sediment, checking the anode, testing the relief valve and confirming the temperature is set somewhere safe and sensible.