i have always been sceptical of claims that zoning systems can save 'up to 40%' of gas used - unless the starting point is pretty basic; ie, no thermostat or TRVs. My jury has just returned its verdict. In the period 31 Oct to 21Dec 13, we consumed 150 cu metres of gas (GCH/HW/hob). The corresponding period last year gives a consumption of 122.5 cu metres: a saving of 19%. Am I surprised/disappointed - no.
In truth, we have been 'warmer' this winter than last as the heat has followed us around the house thanks to the controller and its settings. Rather than light our woodstove during the day, we just keep the temperature up in the room that we are in. It follows that our stock of wood is up adding to the savings but as, I say, the real advantage for 2 retired people living in a 5 bed house is that we are getting best use out of the energy that we pay for.
A slight concern that I have is the long-term reliability of the kit. With two BDRs replaced recently under warranty, a single BDR replacement in a year would be a big hit on the energy cost saved.
I would be interested to hear how others are faring with this technology? I should add for completeness that we have a 14 year old system boiler and unvented tank. Twenty one HR92s replaced 20 manual TRVs.
In truth, we have been 'warmer' this winter than last as the heat has followed us around the house thanks to the controller and its settings. Rather than light our woodstove during the day, we just keep the temperature up in the room that we are in. It follows that our stock of wood is up adding to the savings but as, I say, the real advantage for 2 retired people living in a 5 bed house is that we are getting best use out of the energy that we pay for.
A slight concern that I have is the long-term reliability of the kit. With two BDRs replaced recently under warranty, a single BDR replacement in a year would be a big hit on the energy cost saved.
I would be interested to hear how others are faring with this technology? I should add for completeness that we have a 14 year old system boiler and unvented tank. Twenty one HR92s replaced 20 manual TRVs.
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