Hot-water gas use is higher than expected | Homecode

What is known — and what is not

What the use may mean

Hot-water demand can remain when space heating is not wanted, while a storage schedule, guests, more showers or baths, a catch-up reading or unexpected heating demand may change the total. The gas bill does not allocate use to one appliance. [1][2][4]

What you can safely observe

• For a short representative period, note showers, baths, guests and other large hot-water draws without collecting unnecessary personal information.
• Copy the visible hot-water mode, schedule and any space-heating demand from documented occupant controls. [4]
• Record whether hot water remains consistently available and whether any external fault code appears, without dismantling taps or equipment. [4]
• Compare actual gas kWh per day and reading status across periods with similar occupancy. [1][2]

When to stop

This review covers only the stated non-emergency observations. Stop if a fault or safety warning appears, equipment is damaged, wet, leaking or abnormally hot, or the check cannot stay on a normal room floor without opening, detaching, resetting or adjusting anything outside documented occupant controls; the new fact needs its own H3 route. [4]

Who to contact next

Ask the supplier to reconcile estimates, readings and account data. Where actual use remains high or hot-water performance changed, use a Gas Safe registered engineer qualified for the exact boiler or water-heater category; tenants should report unreliable hot water to the landlord. [3][6][7]

Cost and quote evidence

Use actual kWh and the applicable tariff for personal cost, but do not claim an exact cost per shower from a whole-home bill. Require quotes to separate demand, control, storage and appliance findings and to state assumptions behind savings. [1]

Effect on a sale or letting

Unexpected use does not itself alter an EPC or quantify property value, while unreliable hot water may lead to buyer or tenant questions. Keep kWh evidence, schedules, service and Gas Safe records, installation documents and the current EPC; landlords remain responsible for relevant hot-water repairs. [8][7]

If you smell gas or a carbon monoxide alarm sounds

• If you smell gas or suspect a leak, stop this page. HSE says to call 0800 111 999 immediately, open all the doors and windows, and shut off the gas supply at the meter control valve if you know where it is. [6]
• National Gas says not to smoke or light matches, and not to turn electrical switches on or off. Do not enter a cellar to reach a meter. The National Gas Emergency Service on 0800 111 999 is free and open 24 hours a day in Great Britain. [9]
• If a carbon monoxide alarm sounds or you suspect carbon monoxide, NHS says to stop using the suspected appliance if you can, go outside, and get medical advice before going back in. Call NHS 111 if you have symptoms. Call 999 if anyone is finding it hard to breathe, has suddenly become confused, has lost consciousness, feels weak, or has chest or muscle pain. [10]
• If you think a gas appliance is leaking carbon monoxide, NHS says to call the National Gas Helpline on 0800 111 999. That number is for Great Britain. HSENI publishes 0800 002 001 for the Northern Ireland Gas Emergency Service. [10][11]
• Do not restart or work on a gas appliance, flue or pipework. HSE says anyone employed to work on gas appliances in domestic premises must be a Gas Safe registered engineer. [6]