After having a WB 30cdi combi installed in October 2011, my recent gas statement would suggest that it's using more gas than the old back boiler by around 10%.
I've read through this forum which has just confused me even more, with conflicting advice being given to people also seeing a rise in useage since having a combi fitted.
As understand it, it's best to have the TRVS open to stop the boiler cycling, which they already are.
The key point seems to be the temperature of the returning water to the boiler. It's a condensing type boiler, very efficient I was told, but I'm still confused what the returning water temperature should be to get the best from the boiler.
As the boiler is in an outhouse, I've recently lagged the pipes with that silver bubble wrap, but checking the meter is suggesting that I'm using even more gas now, 8.42 units per day over the last 19 days compared to
5.48 per day in the preceeding 114 days.
Has lagging the pipes simply meant that I'm now returning hotter water to the boiler than I was before, which I thought was a good thing, but clearly isn't.
Does this affect the condensing function, which I thought reused the hot fumes that would usually be vented to air.
I've read through this forum which has just confused me even more, with conflicting advice being given to people also seeing a rise in useage since having a combi fitted.
As understand it, it's best to have the TRVS open to stop the boiler cycling, which they already are.
The key point seems to be the temperature of the returning water to the boiler. It's a condensing type boiler, very efficient I was told, but I'm still confused what the returning water temperature should be to get the best from the boiler.
As the boiler is in an outhouse, I've recently lagged the pipes with that silver bubble wrap, but checking the meter is suggesting that I'm using even more gas now, 8.42 units per day over the last 19 days compared to
5.48 per day in the preceeding 114 days.
Has lagging the pipes simply meant that I'm now returning hotter water to the boiler than I was before, which I thought was a good thing, but clearly isn't.
Does this affect the condensing function, which I thought reused the hot fumes that would usually be vented to air.