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Post by rocketmanbkk on Aug 9, 2020 16:50:58 GMT
Here’s a question I was asked that I couldn’t answer.
How long does a 250 litre unvented cylinder take to heat the water from a boiler?
I’ve got a combi so I have no idea.
The chap is trying to set up his timer.
Any experience?
Cheers all
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Hot water
Aug 9, 2020 17:11:51 GMT
via mobile
Post by dickpuller on Aug 9, 2020 17:11:51 GMT
Here’s a question I was asked that I couldn’t answer. How long does a 250 litre unvented cylinder take to heat the water from a boiler? I’ve got a combi so I have no idea. The chap is trying to set up his timer. Any experience? Cheers all It depends on the size of the coil & if there’s anyone drawing water. |
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Post by tomplum on Aug 9, 2020 17:54:56 GMT
i would say average of 20 minutes in summer, Winter will take longer, If you needed an acurrate time, A BTU is the unit of energy it takes to raise a pint of water 1 degree in F, So if you boiler's output is 50,000 btu's and your hot water cylinder is 30 gallons, then the variables are, heat loss through pipework, temp outside, is heating on, Then multiply X by Y add a % for how hot you want it to be, add vat, average is 20 minutes from cold to 60 degres,  |
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Post by rocketmanbkk on Aug 9, 2020 18:17:23 GMT
Cheers
I’ll tell him to set his timer for 45 minutes in the morning & see if that’s any good. It’s a 250l cylinder but only him & his wife.
Cheers all
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Hot water
Aug 10, 2020 6:13:23 GMT
via mobile
Post by dickpuller on Aug 10, 2020 6:13:23 GMT
Some of the beard stroking, so called, Plumbing EngineerImg Ponces are now advocating Hot Water Priory. Where the HW is never off, so you’ve cylinder full of HW 24/7.
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Post by DIYDafty on Aug 10, 2020 11:24:31 GMT
Some of the beard stroking, so called, Plumbing EngineerImg Ponces are now advocating Hot Water Priory. Where the HW is never off, so you’ve cylinder full of HW 24/7. What is the theory there Dick? Surely in a world of "energy saving" and all that crap you'd have it off as much as possible? |
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Post by rocketmanbkk on Aug 10, 2020 11:28:46 GMT
Some of the beard stroking, so called, Plumbing EngineerImg Ponces are now advocating Hot Water Priory. Where the HW is never off, so you’ve cylinder full of HW 24/7. What they’re saying it’s cheaper that way or whst? |
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Post by dickpuller on Aug 11, 2020 18:43:24 GMT
Basically they’re talking shite, we just don’t use enough HW in 2020 to justify their claims. Another thing, they didn’t like it when I called them a bunch of useless wankers, I think I’m banned, fucking cheeked???!!
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Post by arfur chrysaik on Aug 11, 2020 21:04:58 GMT
Here’s a question I was asked that I couldn’t answer. How long does a 250 litre unvented cylinder take to heat the water from a boiler? I’ve got a combi so I have no idea. The chap is trying to set up his timer. Any experience? Cheers all Here rocky,
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Post by dickpuller on Aug 12, 2020 17:23:50 GMT
Here’s a question I was asked that I couldn’t answer. How long does a 250 litre unvented cylinder take to heat the water from a boiler? I’ve got a combi so I have no idea. The chap is trying to set up his timer. Any experience? Cheers all Here rocky,
😂😂😂😂😂. Fucking good luck with that!! 🤪🤪🤪🤪🤪 |
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Post by cluelesskarl on Aug 12, 2020 18:23:22 GMT
If I put mine on for 3/4hr, I get a large hot bath, and washing up. I by-passed the timer years ago, so need to remember to turn the trip off...
Getting pissed, and waking up in the early hours, sweating, groggy, and a giant kettle boiling away isn't great...  |
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Post by DIYDafty on Aug 12, 2020 19:49:32 GMT
If I put mine on for 3/4hr, I get a large hot bath, and washing up. I by-passed the thermostat years ago, so need to remember to turn the trip off...
Getting pissed, and waking up in the early hours, sweating, groggy, and a giant kettle boiling away isn't great...
Ahh but it won't be boiling away. It will groan like an old woman. How do I know? When we moved in 10 years ago their cylinder stat had long broken. Woke up in the middle of the night thinking the place we'd just bought had ghosts....
Next day I realised cylinder stat was broken. Presumably the temp never goes above the flow temp from the boiler ?
Out of interest why did you bypass it? Was I being a dafty for doing the opposite ?
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Post by cluelesskarl on Aug 13, 2020 5:19:16 GMT
It pretty much sounded like boiling as it vented into the cold water tank above Dafty. I meant timer, not thermostat. A few beers last night... beer drinker Have edited post.
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