When a hot water system fails, the first question is whether it is worth repairing, and the honest answer depends on the unit's age and what has gone wrong.
A system in the first half of its life with a failed element, thermostat, thermocouple or valve is usually worth repairing, because the tank, the expensive part, is still sound. A system near or past its expected life that has developed a tank leak is not, because the leak means the tank itself has gone and no repair brings it back.
If replacement is the answer, the next question is which type. Continuous flow gas heats water on demand and does not run out, which suits a household that uses hot water at peak times. Storage gas and electric suit different layouts and budgets, and heat pump and solar reduce running costs but cost more upfront and need the right space. The right choice depends on the household size, the existing connections and where the unit can physically go.
What we will not do is push a replacement when a repair is sensible, or a repair when the tank has clearly failed. We will tell you which situation you are in and why.
If a system is leaking water near electrical fittings, or you smell gas near a gas unit, treat it as urgent. For a gas smell, turn off the gas at the meter if you can do so safely, do not use electrical switches, and call for help.