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in mears defence many engineers have outdated mears calculators.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.