What is the difference between a vented and an unvented hot water cylinder?

A brief explanation between a vented (usually blue, green or yellow) and an unvented hot water cylinder (usually white).
www.upsherheating.co.uk
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[@michaellebruin]

I had the Unvented fitted a couple of years ago. Best thing ever. Great pressure all the house. The water stay warm for days. Perfect. Great explanation too. Cheers pal.

[@allaroundme5429]

Brilliant. Clear and concise. Very helpful!!

[@DebugOutput]

Nice simple explanation, many thanks!

[@nathanialmajor1270]

Brilliantly easy to understand, thank you

[@be_water_]

Short and simple, brilliant

[@keekpwner]

Great quick video!

[@jitutalajia598]

Thank you for sharing this information

[@Matthew-jn7ss]

Thanks for the video mate 👍

[@UpsherHeatingHeroes]

Not problem at all 👌

[@JJ-bv7fc]

Nice simple video

[@rowenacroft313]

Really helpful. Thank you! 😅

[@rohitnarang3123]

Happy new year’s

[@NewJill2024]

wow, so helpful!

[@mrb9830]

Thanks! What causes a showers flow rate to drop (e.g. turning on a tap or flushing a toilet) and how can I avoid ir? Does an unvented system prevent?

[@Ed-fp9rx]

Can you have a vented system where the mains isnt fed from the f and e tank?

[@3mbr436]

Excellent layman's terms

[@mlmcnew6761]

Can you put a back boiler into the pressurised system

[@smalik695]

Very nice 👍🏼

[@petersutton3054]

Hi so my system I have a F&E tank in loft that feeds the central heating system and a hit water cylinder there is a white coloured expansion vessel guessing that's for heating side do what system do I have all the house on my estate have same as me they are 10 years old.

[@tedlahm5740]

Called Domestic Hot Water. For bathing etc. in North America.

[@benlion1972]

is pressurised hot water tank keep the water hot for longer

[@angusvon5185]

How long does it take to heat unvented with immersion heater?

[@Andrewflex95]

Thanks a lot!

[@balasuriyage]

Nice one thanks

[@avit24]

Well said buddy..

[@evh22]

Really helpful thanks Scott. We have a heatrae megaflow tank. I currently have a Trevi boost shower which I want to replace. Will I need a pump or what type of shower do I need to look for?

[@oneman2001]

You shouldn't need a pump and any shower with an pump already may need to have the pump removed.

[@markopolo9559]

Hi. Thanks for explaining vented and invented systems. Just wondering if I put an unvented unit in and get rid of my cold water tank, how do I get the cold water in my shower/bath?

[@boxinggloves1699]

Research more

[@The7wetrustin]

Thanks lad

[@demonskier1]

Hi, why do you need an expansion pipe if the cold tank is open to the atmosphere? Wouldn't the water just expand up the cold feed ?

[@UpsherHeatingHeroes]

demonskier1 if there was no expansion pipe, then hot water has more chance of mixing with the already cold water. Making the chances of bacteria, such as legionella to form. You don’t want the hot water to go into the tank, so the pipe must be raised to allow for this. The expansion pipe is required to conform with water regulations. Hope this helps

[@demonskier1]

@@UpsherHeatingHeroes Many thanks

[@Bigtel1970]

How does the unvented system allow for expansion?

[@TONE11111]

add an expansion vessel or loss leak radiator, like a heated towel in bathroom/rad that draws heat from the circuit

[@dreadpirateroberts4052]

What about expansion on the unvented system?

[@tedlahm5740]

believe the expansion, if any, goes back to the cold water supply. Meaning back the source in the street? comment please

[@jazzsingh2451]

Hi I have a unvented hot water cylinder in my flat.. When attempting to change my bar mixer shower, hot water continues to pour out of the hot side. I have turned the stopcock off and water stops pouring out of the cold side but not hot side. Do you know how to turn the water supply from the unvented water cylinder off?

[@marcusdavidsmith3047]

Did you work this out? Lol

[@jazzsingh2451]

From what I recall.. I attempted to turn the valve anti-clockwise for the hot water pipe that leads to the bar mixer.. due to the age of the valve and corrosion it began to squirt water out... so I was forced to turn the whole supply off from cock stop. I was without water for 3/4 days awaiting for an engineer to come out and replace the valve and bar mixer. In regards to the bar mixer he used PTF tape to prevent water from leaking. I later replaced the valves from the cyclinder to industrial ones with a ball and lever so that they never corrode.@@marcusdavidsmith3047

[@richardwallace3477]

Why is unvented more expensive if there are fewer parts?

[@shredder9536]

It's a stainless steel tank instead of normally copper one for vented. It also has parts not in diagram like pressure vessel, combination valve etc

[@Chrominance87]

So the point of the header tank for the unvented cylinder is to create a solution for areas with weaker incoming street pressure? yes.

[@paulwheatley6]

Why have you not mentioned and included the expansion vessel for the unvented cylinder BOOM!!!

[@UpsherHeatingHeroes]

Hello Paul, the basis of this video was for simplicity. If I was doing a video targeted at fellow heating professionals, you would have a case. We have not included the expansion vessel, control inlet valve, D1/D2 pipework, zone valves, T&P valve amongst other requirements because as professionals this would be our job to carry out.

[@RosskillbaneC]

You should've made the unvented cylinder more rectangle 😉. Wheres you're d1 and d2 pipework Where is the exanshion vessel. 😉 mah fair play just a basic understanding of em.

[@whitefields5595]

The downside is my daughter. She has showers that would float Noah’s arc. Torrents of hot water is a cost not a benefit

[@ergophonic]

Hahaha!

[@joeroganpodfantasy42]

You should create a central bank for your family release a currency and run an economy for your family. Track water usage with a sensor and heat usage and give out bills. Pretty soon she will realize her water heat and internet bill is cutting on her lifestyle so she will start saving.

[@whitefields5595]

Joe, she's left home now. When we visit her in the winter we have to sit under blankets. I fitted a temperature display on the hot water system. When it failed she went nuts until I fixed it. I think its called 'growing up'@@joeroganpodfantasy42

[@user-no7xr5dt9o]

That arrangement will blow up because you need to vent the furnace bro....

[@UpsherHeatingHeroes]

This is the arrangement we have in the UK with multiple safety valves. Safety valves are not featured in this video as it's aimed at people getting a basic understanding between the two systems