Z
ZeB
Hi there, I've got a Baxi Duotec 40, had it for about 2 years now and seems to do exactly what i intended it to, I had it fitted just after we bought our first home 2 years ago, previous system was a back boiler with Hot Water Cylinder, I completely replumbed the house when we moved in and had the combi fitted, at the time we had a tight budget and I could not afford new Rads aswell so hav been running the system quite ineffeciently so far as I cannot run the boiler on anything other than max output on CH as the old Rads do not loose enough heat quickly enough, I am at last in the position and hav ordered 7 new rads and a weather compensation kit (Baxi Multifit), I have massively oversized the new Rads on the premise of havin an extremely low flow temp and even lower return to maintain condensing operation of the boiler, as far as i'm aware the system should run for longer periods but at the lower modulation level and condensing mode all the time, with the old Rads I'm only gettin a 6-7 degree temperature drop flow to return. As I have ordered my new rads and compensation kit I am already planning the next stage of increased efficiency.
The next stage wheneva my budget allows is to incorporate solar thermal and a Heat Bank Thermal store into the system, from what i have read and researched so far there are 2 main options:
1 - Preheat the cold water prior to the combi topping it up
2 - take a zone off the primary circuit to a twin coil cylinder
I would sway towards option 1 atm as no matter what solar heat was stored i would always hav unlimited water from the combi.
My main question being could I use a Heat Bank Thermal store to collect solar energy and then use a plate heat exchanger, CH pump and flow switch to preheat the cold goin into the combi without the need to store luke warm water for preheat. Will my combi allow me to use this configuration, Obviously i would utilise a TMV to maintain a safe temperature of hot water to distribution pipework.
Also looking at the Multifit Gasaver from baxi any1 rate it? believe it is covered by the green deal?
The next stage wheneva my budget allows is to incorporate solar thermal and a Heat Bank Thermal store into the system, from what i have read and researched so far there are 2 main options:
1 - Preheat the cold water prior to the combi topping it up
2 - take a zone off the primary circuit to a twin coil cylinder
I would sway towards option 1 atm as no matter what solar heat was stored i would always hav unlimited water from the combi.
My main question being could I use a Heat Bank Thermal store to collect solar energy and then use a plate heat exchanger, CH pump and flow switch to preheat the cold goin into the combi without the need to store luke warm water for preheat. Will my combi allow me to use this configuration, Obviously i would utilise a TMV to maintain a safe temperature of hot water to distribution pipework.
Also looking at the Multifit Gasaver from baxi any1 rate it? believe it is covered by the green deal?