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Yes and no. You will see how much money you are saving just heating hot water, but you will also be a little frustrated by the fact that new boiler/Evohome central heating performance on a cold day will remain an unknown until the colder weather returns.
Magna flush only 30 minutes! Every radiator in my 19 radiator home was flushed through separately. It took a day and half with a large increase in my metered water bill.
I was also surprised by how much gas my old boiler pilot light used.
Interesting resume. Thanks. The bit that troubles me is the concept of needing to upgrade the gas supply pipe. My boiler is coming up to 21 years old. Same age as the house. At the current boiler end of the supply the pipe looks to be the smaller 15mm although my service engineer mentioned it is possible that once it is exposed it may be it is stepped down to that. If it isn’t it will present a big problem as my meter is outside at the front of the house; the last thing I want is an ugly great gas pipe running across the front and round the outside of the house. I am not sure it will be possible to bring it under the floor in my case.
May have to abandon the thought of a Combi boiler. Then what? Go electric!!
Interesting resume. Thanks. The bit that troubles me is the concept of needing to upgrade the gas supply pipe. My boiler is coming up to 21 years old. Same age as the house. At the current boiler end of the supply the pipe looks to be the smaller 15mm although my service engineer mentioned it is possible that once it is exposed it may be it is stepped down to that. If it isn’t it will present a big problem as my meter is outside at the front of the house; the last thing I want is an ugly great gas pipe running across the front and round the outside of the house. I am not sure it will be possible to bring it under the floor in my case.
May have to abandon the thought of a Combi boiler. Then what? Go electric!!
I was told that new regulations demand a 22mm gas pipe to the boiler. My meter is on the outside of the house but luckily it is near the boiler. Unfortunately, my electric meter is on the opposite side of the house so it was not possible to 'earth' the gas pipe which caused an issue when I had to update the earthing cable around the fuse box as I refused to have a cable around 3/4 of the outside of my house or have the whole ground floor up! It ended up as a recommendation in the certificate only.
Note: dty I can't send you a private msg as you private msg box is full it seems.
Intergas Eco RF 36, with a 120L pre-heat tank on the DHW side that I'll heat using excess PV. May put another tank in the CH loop at some point to further mop up summer generation once the DHW tank is up to temp, although obviously that'll confuse evohome/opentherm!.
Currently being installed by Dan's friend 'The Fat Plumber' ;-)
What are the advantages of running it in this configuration as opposed to a Stored HW solution? Is it simply that you aren't wasting any energy by Storing it, until you actually need it? Also how does the Header tank gets mains pressure? Is that pressurised?
Advantage is that the tank doesn't need to be kept at a set temperature, so I can use my PV mop-up in an effective manner.
It's not a header tank - it's a 120L unvented cylinder, just before the boiler DHW input. At mains pressure.
So if there's been no/little sun the tank might be quite cool and the boiler will go full-pelt. But if it's been sunny the boiler might not need to come on at all.
I'll be monitoring temps in the tank, and if it hasn't had a consistent 60+ for an hour over the past 7 days I'll run a manual legionella cycle. Not sure whether to do this via the immersion, or from the boiler (the guys are also connecting the coil in the tank to the heating side of the boiler via a zone valve. I thought I'd re-use my existing Evohome DHW kit to monitor/control this.
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