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Many Thanks, So its not totally crazy. haha. Been doing many calculations and they all seem to hit that. I guess I am meant to ass 3000W for hot water on top. Is that right?

So I am trying to do a heat loss calc for my renovation project. Im not sure if I am doing it right. Wonder if someone could help. First off I am using Stelrad STAR App to calculate as it seems the most detailed. It is a 1900 solid stone cottage, that I have insulated big time. 100mm...

Many thanks, I will speak to Grant tomorrow before buying. Cheers

Is that right? Never thought of that? Guess you have to balance out between rating etc. I guess its better to have it working in condensing mode for efficiency and forgo some short cycling.

I ended up installing my own bespoke system, in the end. I used a free flowing screed, at 50mm over 16mm pipes at 150mm centres. Ended up with 1.2Km of pipe over 12 zones.

Has anyone had any experiance on derating a Grant Vortex Oil Combi? Heatload for my new house is looking likr 16Kw and the smallest they do is a 21Kw but reading the book of words it can be derated. Seems to be a air disk change, but no mention of nozzle size. Seems odd.

Awesome, tucked away... Thank you

I have a Prem 24 up and running lovely. I get alerts to the app and my email, if the alarm is triggered, or someone arms or disarms the system. All great. I have just added a couple of Smoke sensors. They work perfect when tested, internal sounders, etc. But I got no alert to the the app or...

Many Thanks. The insurance do not require monitored or police response. I can monitor it myself if I get notifications, I have CCTV also, etc. So I can check CCTV at alarm and call police if I see a break in. Just wondered if it would be cost effective to pay someone else to do that. Maybe...

Not really. What is graded and certified?

Its for my shop. So not sure what options I have.

Anyone know any company's that will monitor my Texecom system with SmartCom?

Woohooo, it was the press and hold chime button. Thank you so much

I have Wintex and trying to setup when main door opens it chimes as this is my little shop. I just cant get it to work. Have I missed something? Here is the setup for the Zone Please can anyone help?

I did however come across slimline heat store. Maybe this is an option with just a system boiler? Are modern heat stores economical

I can find no reference to a buffee vessel on google. Do you have a link to any info. All the info I find online for BUFFER vessel talk about stopping short cycling, for heat pumps etc. Is that not what we are trying to do here?

Seems people are using a 2 connection system these days. Like this.

I assume I need something like this.

Thanks everyone for the input. Reason for combi is space number 1, the boiler house is small. Secondly we work all day, and don't use that much hot water, so it makes sense to heat water only when we need it. Seems crazy to either store 300L of hot water all day or heat 300L of water for the...

Ahh I see. The principle is all the same try and get a volume of water upto temp with as little cycles as possible, as each cycle wastes a bit of oil. I wonder what your wee 300L would cost to get shipped up here :)