I was looking at a house for sale and downstairs has a gas multi-point water heater? The house also has gas central heating, so alarm bells started ringing, why would you have gas central heating and a multi-point? Surely thats double gas being used, so therefore unefficent? Why can't the central heating do the hot water like every other house? Whats the point/purpose of the multi point?:mad2:
Take a shower with British Gas serviced 20y old Valiant combi and you'll understand it very soon :25:.
For some very odd reasons the multipoint heaters are disregarded in this country...
Maybe because they have less moving parts to fail than typical combi, and fail less often?
Also they are designed with optimum power for HW heating, and have better response time than the typical combi with secondary plated heatex.
Also way more efficient than 20y old combi with scaled+sludged up plate heat exchanger
Simpler and easier to maintain than combi...
Avoid CH boiler oversize and reduce cycling -> improving the CH efficiency...
If the boiler is heat only - than multipoint will provide for HW and boiler CH.
If there is the combi for CH - then probably the HW side of it had failed, while CH was fine. So HW was delegated to multiport...
Just call for competent/skilled independent GSR guy to check/clean the boilers and their combustion chambers/heatexchangers, top up the expansion vessel (if needed).
If he is doing a proper job, he should clean all the debri/insects at the bottom of the combustion chamber, and may use a hoover/brush for it. It should take him at least 1.5 -2hours in total on both devices to do all servicing properly.
Test the CH and HW system.
And silence the bells.
