mears calculator

[buckley plumb]

which mears central heating calculator is the best there is 3 - older houses / new houses and first generation accurate one is the one based on the first generation the best ? and can anyone rercommend a good on line calculator

thanks ant

 

[SimonJohns]

Buy the one that's most comman to yourself

It depends on what your working on.

 

[Simon F]

City Plumbing Supplies - Find your nearest CPS branches

Replacement Boiler Size Calculator

these are a couple that I have picked up from previous posts, hope they are useful.

 

[Dannypipe]

Lots of questions there. I used to use an old one from the 1980's but eventually lost it.

Since then I bought one (from someone on here) that's in KW (my old one was BTU). I don't like the new one as much as it's a bit more complicated. I'd have to spend a couple of evenings sitting down with it to suss it properly. I think it must be based on the first generation one, but as I say in KW. It's certainly different to use.

If you want the calculator just for heat loss calcs, then there are a lot of very good free online sites (or iphone apps so I'm told).

If you want to calculate flow rates, pipe sizes ect, then yes you really do need to buy a Mears.

 

[AWheating]

city plumbing website has a great free rad size calculator. last time i check it was very close to my longhand cals which supprised me. my old mears was way out.

 

[zzzjim]

my old mears was way out.

Out of curiosity , which way was error ?

 

[Mike Jackson]

I found my Mears oversized by about 50%

 

[zzzjim]

Cheers Mike J ( just need global warming to make its mind up - Warm/Cold )

 

[diamondgas]

Hi Ant, I use to use Stelrad's STARS programme in the days gone by and still use it now and again when the needs must ... There's an online one here Stars App | Heat loss calculator for any room although I've never used it myself it's write up sounds impresive

 

[AWheating]

Out of curiosity , which way was error ?

oversized.

i was told a couple of years ago by a heating design engineer (35+ years experience)that when he tested his calculations against a mears he got oversized rads by about 10-30%. I think he said upstairs rads where always near 30% oversized.

in mears defence many engineers have outdated mears calculators. cant beat long hand cals if you have the time.

 

[grahamgas]

I found my Mears oversized by about 50%

Me too

 

[Dannypipe]

Yeah, Mears def' does over size. I agree.

 

[Bernie2]

I used Stelrad "Stars", Mears and Myson. Tended to over size perhaps but at least you never got many "Its not hot enoughs". Eventually you tended to build up your own ideas of what to use. But its always handy to check yourself with one or the other of the programs. The Stelrad "Stars" is not for download now its on-line only.

 

[Dannypipe]

Just registered with that Mears calculator. Looks quite good. Doubt I'll use it, but thought I'd take five minutes to get it sorted.

Oh while its in my head:

Honeywell have released a nifty little app for the iphone. Fault finding and wiring drawings and more.

Again, doubt I'll use it, but it took five minutes to put it on the phone, so why not!?

I've only taken a two minute look at it, and it looks well made. It's free, just download it from the app store.

 

[grahamgas]

Honeywell have released a nifty little app for the iphone. Fault finding and wiring drawings and more.

Again, doubt I'll use it, but it took five minutes to put it on the phone, so why not!?

I've only taken a two minute look at it, and it looks well made. It's free, just download it from the app store.

Very good that app. Very handy.
Good reference point for what honeywell sell as well.

 

[Dannypipe]

Yeah, it looks well made. It's free, so anything that's free gets put on the iphone or work laptop. It's all just another tool at the end of the day. If it comes in handy once, then it's earned me money!

 

[mylesy]

theres a radiator calc in the app store though i use my mears mostly. it naturaly adds on 10% as it ses in the book, but if there all trv/ stat controled shouldnt matter anyway. it gets you near thats all that matters. u values?? you can go on all day with the u values if you do it long hand, (which is good if you have a while to spend doing it) but youll end up there abouts in the end.

 

[mylesy]

cheers for the honeywell heads up, never seen it in the app store. (how did that slip by ME haha)

 

[buckley plumb]

Hi Ant, I use to use Stelrad's STARS programme in the days gone by and still use it now and again when the needs must ... There's an online one here Stars App | Heat loss calculator for any room although I've never used it myself it's write up sounds impresive

thanks just tried it its good