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We have an unvented Vaillant ecotec 630 system boiler with a Gledhill 200 litre slim tank on the first floor and the boiler in the utility room on ground floor. Can anyone advise why pump speed (d.019) 2 would be used over speed 1 & what setting would be best for minimum gas usage? Thanks

hi all I hope someone can help out here. I have a vaillant ecotec with v470f controller and VR65 wiring centre and I want to replace with the new vSmart. Does anyone know if the combi pack version works with the vr65 or do I need to upgrade it to the vr66? Does anyone know if the glow-worm migo...

Hi All, we have a Vaillant EcoTec 630 with Gledhill unvented cylinder. With the cylinders thermostat connected to the vr65 It heats hot water in the tank at the scheduled times. I asked the installer to connect the VR10 NTC instead (disconnecting the cylinder stat in the process) & we see the...

our stove pipe lies 6 inches to the left of the natural lie of the flue pipe down the chimney, any practical way to bridge this gap? pic of problem http://www.flickr.com/photos/39995213@N03/3675676417 would this solution work for me...