@@hufartd for heat pumps this is very important but on the viessmann boiler it is pre-programmed to run at 20 degrees warmer than the sense temperature of the cylinder in order to maximise efficiency during hot water heat up
The cylinder is hugely overpriced. The 250lt costs £1,943.34 and when I pointed that out to the heat geeks their response was that “yet it takes sixty days to get hold of one”.
@@serraios1989 what is the price of the same cylinder without the heat geek logo? I'm not sure there is a match on the market so not sure how you would decide it was overpriced.
Sure. The price of a 250lt unvented indirect cylinder varies from £600 to £1400, let’s assume average £1000. My household needs 3000kwh annually to heat up the hot water. If a heat pump is used to provide that heat to this “average cylinder” with a mediocre annual SCOP of 3, it will consume 1000kwh. If the other cylinder, that costs £1943.34, improves the efficiency of the system and raises the SCOP to an amazing 5, the heat pump will consume only 600kwh for the same output of 3000kwh. So annually, there is a saving of 400kwh of electricity. Currently, I pay £0.07 per kWh for six hours during the night and the savings from these 400kwh would be £28 per year. It would break even in 33.7 years using these numbers. Even if breaking even is at only 20 years, I still consider the cylinder very expensive. I hope this makes sense.
@@serraios1989 it makes good sense if saving money is the goal. I don't think most of my customers are worried about money but are very keen to cut down there carbon footprint.
What do you think of a lowered max flow temp on HW reheat to maximise efficiency.
@@hufartd for heat pumps this is very important but on the viessmann boiler it is pre-programmed to run at 20 degrees warmer than the sense temperature of the cylinder in order to maximise efficiency during hot water heat up
Is there more info on this cylinder somewhere, or is it a prototype?
@@handle1196 I imagine you can Google heat geek cylinder or contact Newark cylinders who are the manufacturer
Nicely done, but didn't understand the Carlsburg reference...
@@martinwright7093 it's with reference to the Carlsberg advert where if Carlsberg does it will always be the best
@@andrewmillwardwatford9410 oh yes, I remember now, 'probably the best lager in the world' or somesuch.
Probably
The cylinder is hugely overpriced. The 250lt costs £1,943.34 and when I pointed that out to the heat geeks their response was that “yet it takes sixty days to get hold of one”.
@@serraios1989 what is the price of the same cylinder without the heat geek logo? I'm not sure there is a match on the market so not sure how you would decide it was overpriced.
For me it was just primary school maths.
@@serraios1989 I'm not sure how you worked out it was too expensive can you explain
Sure. The price of a 250lt unvented indirect cylinder varies from £600 to £1400, let’s assume average £1000. My household needs 3000kwh annually to heat up the hot water. If a heat pump is used to provide that heat to this “average cylinder” with a mediocre annual SCOP of 3, it will consume 1000kwh. If the other cylinder, that costs £1943.34, improves the efficiency of the system and raises the SCOP to an amazing 5, the heat pump will consume only 600kwh for the same output of 3000kwh. So annually, there is a saving of 400kwh of electricity. Currently, I pay £0.07 per kWh for six hours during the night and the savings from these 400kwh would be £28 per year. It would break even in 33.7 years using these numbers. Even if breaking even is at only 20 years, I still consider the cylinder very expensive.
I hope this makes sense.
@@serraios1989 it makes good sense if saving money is the goal. I don't think most of my customers are worried about money but are very keen to cut down there carbon footprint.
Overheating because stat is under part of the coil? 🤔
@@D_pawson because I hadn't fitted the thermostat at the point we first fired up the boiler to check the reheat time
Nice work.