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straker1966 · Joined: 06 Jan 2008 Posts: 164 Location: cambridge

cylinder thermostats should ALWAYS be 1/3 of the way up from the bottom of the cylinder...
i know this cos the crusty old bushy sideburns miserable git of a plumber i did my time with told me so..... Crying or Very sad

thescruff · Moderator Joined: 03 May 2003 Posts: 4386 Location: Bath

Yellowman · Joined: 03 Jan 2008 Posts: 66 Location: Sussex

I was alo taught to put the stat a third of the way up.

Reason being if its high up only the top half of the cylinder will contain a decent volume of hot water. the lower down the colder the water.

Where as at the bottom your garuntee'd all the water above is at the set temp on the stat.

Unvented cylinders come with the stat roughly a third up; this must be for a reason.

Immersion heaters are a boost or a back up. Its quicker and cheaper to heat up just the top section of the tank (enough water for shower or bath) Economy 7 have the off peak imersion heater at the bottom but its billed at a lower rate and time does not matter as much so it can heat up a nice full cylinder of water. The booster immersion is higher up, again just to heat up top half of cylinder.

Id imagine room stats were set at the height they are due to the way that heat convects around a room let alone to save dear old granny smith getting on her hands and knees to turn her heating on.

Just my 2p and what i was taught

thescruff · Moderator Joined: 03 May 2003 Posts: 4386 Location: Bath

Thats worth a tenner just to read it Yellowman Laughing

If the stat is set at 65c in the bottom 1/3rd, then the water above it will rise to 75c, Logical don't you think being as how the heat rises.

By the same token, and this is the good bit Laughing

why isn't the room stat 1/3rd up the wall, when you're sat in the chair all the good heat is above your head. Rolling Eyes

straker1966 · Joined: 06 Jan 2008 Posts: 164 Location: cambridge

2 against one scruff- you lose! Mr. Green

1/3 of the way up, its written in the bible...

"THOU SHALT SLICE THAT HOLY FOAM NO LESS THAN ONE THIRD UP...AMEN"

the reason roomstats are fitted so high is to stop the cat upping the temp when your out Idea

poolcorgi · Posted: Wed Mar 26, 2008 7:21 pm Post subject:

A.C.Judd · Joined: 09 Jan 2008 Posts: 6 Location: kent

tell me if im wrong scruff but shouldent that cylinder be on blocks of wood to stop it corroding

thescruff · Moderator Joined: 03 May 2003 Posts: 4386 Location: Bath

Yes it should be on battens for air circulation not corrosion

Yellowman · Joined: 03 Jan 2008 Posts: 66 Location: Sussex

If its not on battons condensation can form underneath the cylinder.

Scruff - Why you being sarcastic for? I was only saying what I have been taught from college. I wasnt saying you were wrong. I repsect your knowledge and I like to read your input on most posts to futher my knowledge.

thescruff · Moderator Joined: 03 May 2003 Posts: 4386 Location: Bath

Yellowman · Joined: 03 Jan 2008 Posts: 66 Location: Sussex

Oh i see!