mistral logo 56x75 Established in 1984, Mistral is proud to be widely considered the 'generic' software system provider for the refrigeration & air conditioning industry. In its domestic market, Mistral software is used by more than 85% of refrigeration & air conditioning contracting firms and programs have been distributed to over 17,000 users in over 100 countries around the world.


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Mistral Associates - News November 2018

mistral spot the ball

Spot the Little Red Dot little_red_dot.png

A little like 'Spot the Ball'. Except Mistral's little Red Dot isn't on a football pitch, it's on this website!

A bit of a challenge then! Worth having a go though - It costs you nothing to enter and the prize could be worth thousands for the lucky winner! Click on the football above to read the easy rules.

Are there any clues? Yes. The Red Dot isn't embedded in an icon, logo, animation (like the above animation!) or part of any text or punctuation. It's where you would not expect to find it!

If no one appears to be getting even close then we will start publishing more clues right here.

SO BOOKMARK THIS PAGE AND CHECK BACK OFTEN! (Press Ctrl + D to bookmark)

Competition closes 31 December 2018.



Christmas has come early!

Mistral's Cellwind and Linewind programs are now bundled for Linewind's original price of just 95.

mistral_cellwind_ani.gif

We realise that this is hardly fair to anyone who has purchased the licence to access either of the above superb programs in the past. So we have a simple solution. Click on the image above and this will take you to a very short and simple to complete request form where you can upgrade either your current Cellwind or Linewind installation to gain the one you are missing - at no cost! *

It couldn't be any simpler. But hurry. Santa returns to Lapland on 26 December and then the offer will be over.

* If you have already bought licences to access both in the past then click on the above image and complete the form anyway. Tell us what other Mistral program you wish you had and we'll try and help.



Mistral 'Definitions' & 'Scientific Factors' pages improved and restyled.

A boon for teachers and trainers in our industry.

mistral definitions page

So many Mistral program users are unaware the 'Mistral Definitions Index' even exists. Both on Mistral's website and also supplied with every program issued. Which is a shame! The link is found on the top menu bar of the Help Pages for 'Airwind', 'Cellwind', 'Coldwind' and other core programs. However, the few that do refer to it will welcome recent improvements and additions to this valuable educational and technical reference tool.

Text has been made easier to read (in line with the process described in the News feature below) and page navigation made simpler. A minor detail but the irksome earlier version not centering on the screen has also been resolved.

mistral data iconFinally, similar improvements have also been applied to 'Mistral Scientific Factors'. One of the largest and easiest to use (jargon and verbosity free! mistral kissing icon) resources of its kind on the Internet.

Over 1,050 useful scientific conversion factors. All gathered together in one easy to use alphabetically arranged resource. Next time you have to convert Btu/lb/Rankin to kilojoules/kilogram/Kelvin or vica-versa you'll know where you can find a reliable answer!

We hope you like the improvements and would also welcome your ideas for any further changes and additions. Feedback

Cost to Mistral for just a day of editing work on two of Mistral's 19,000+ code pages:-
Just 250 Euros.

No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Help page font change and text reset

"The impossible we do at once. Miracles take a little longer."

We have all smiled at that sardonic comment at some time or another.

It is a fact though that seemingly simple things to achieve in computer programming can cost literally thousands, even tens of thousands. Whilst the jaw droppingly impressive can often be put together in seconds and for next to no cost at all. A paradox.

Deciding to upgrade fonts (the letters that make the words) in just a small part of our programs falls somewhere between the two.

Due to another paradox created by the recent advent of larger, high resolution, flat screen monitors; actually resulting in smaller and more difficult to read text, Mistral has been forced in some instances to abandon its favoured and Microsoft recommended font of decades, Ariel, in favour of the more modern and legible Segoe.


mistral ariel font


mistral segoe font

We hope you like it. It cost us more than we were expecting!

New Help pages

Cost to Mistral editing illustrated Help pages to accomodate new font: 6,500 Euros.

At the same time we overhauled our website too. Cost 11,000 Euros.

No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Associates - News October 2018

Interactive Meteorological Database additions

mistral solar path

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The United Kingdom is a renowned world leader in food 'Cold Chain' technology. Refrigerating food from 'Field to Plate'.

What is perhaps less well known is just how much of this advanced refrigeration technology is exported to other countries. From Afghanistan to Zambia along with all points inbetween.
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Professional Refrigeration Engineers recognize that all new refrigeration projects start with the heat load calculation. Hence the reason Mistral's 'COLDWIND' load calculation program began its life over a third of a century ago. What is also often not appreciated is that 'COLDWIND' is under constant, daily development. Not just to maintain it so as to keep abreast of unrelenting advances in computing technology but also to reflect changing needs and new challenges in the commercial refrigeration industry the program serves.

One of these challenges is constantly updating and adding to 'COLDWIND's vast interactive database of actuarial, meteorological data. 'COLDWIND' is capable of calculating not just 'worst case' results for refrigeration projects, but also energy profiles at 15 minute intervals for every day of the year, in tens of thousands of world locations. With no more than a couple of mouse clicks on thousands of world maps, or alternatively by simple to follow, alphabetically arranged, country by country menu selections.

metwind sample

Research in meteorological data is a surprisingly complicated and generally quite expensive process. Official sources that have invested huge amounts of money gathering and formulating reliable, certified meteorological data don't often hand it out freely to just anyone that comes along and asks for it! And not unreasonably they ask to be paid for it.

Good to know then that over the preceding nine months Mistral has found, purchased and added meteorological profiling data for another 200 or more primary world locations. Thereby further helping refrigeration companies involved with designing refrigeration installations in locations all around the world.

'COLDWIND's meteorological interactive database is shared by both 'AIRWIND' and 'CELLWIND' and also Mistral's Shareware program, 'METWIND'.

See:-

airwind icon'AIRWIND' spacer cellwind icon'CELLWIND' spacer coldwind icon'COLDWIND' spacer metwind icon'METWIND'


Cost to Mistral researching & compiling Meteorological database edits: 1,300 Euros.

No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Associates - News September 2018

New account PRICE CHANGES

Following the huge and sustained fall in value of the UK Pound against other leading world currencies trading has proved increasingly difficult for Mistral Associates.

It comes as a surprise to many people, especially those adhering to the myth that software developers have a 'Licence to Print Money', but the fact remains that software development is an extremely hazardous business to be in. Margins are very small and the risks very high. Explaining perhaps the reason why over 90% of all software companies cease trading or go bust within their first five years following start-up. There are exceptions of course. Microsoft Corporation, (and with no fear of accusations of libel!) with their dubiously ethical trading practices are one. Social media software companies are others. Though many of these are actually only supported by overly optimistic stock brokers and have actually yet to make any profit at all! Just to remind everyone. The 'Dot Com' crash of the late twentieth century was no myth. That was FACT!

Mistral Associates are different though. Although occupying a clearly even more hazardous 'niche market' sector Mistral has been successful since inception over a third of a century ago, and where its imitators and plagiarists have all largely since disappeared. Why? Lots of reasons. Not the least of which is the high quality of its product and service but also its dogged refusal to diversify and finally its celebrated very fair pricing policy.

Do you remember Mistral's promise?

Mistral's prices are 'FIXED IN PERPETUITY' (subject only to inflation).

Well we are afraid that the 'subject only to inflation' time has come. A whole twenty five years after our last major price review, and in the light of the disastrous effect the Brexit debacle has had on the value of the Pound, we now have no choice but to increase our selling prices if we are to remain in business.

However there is still good news for our large number of loyal customers, many of whom have accounts going back with Mistral for twenty five years or more. We will still not increase our prices to you. For the time being at least. And even when we are ultimately forced to do so it will still be by amounts well below cumulative inflation rates for the time period.

For new accounts see Mistral's new Price List here:-

Please also do note that even with these new prices access to the world's most comprehensive Expert Software System for the Refrigeration & Air Conditioning industry, and certainly the best maintained and easiest by far to use, remains at only a few pence/cents per day, or even less, per user!

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Yes. We've all heard the joke.

Boss: "I feel as though I'm a mushroom."

Boss's PA: "Why?"

Boss: "Because I'm kept in the dark and everyone keeps throwing s**t at me!"


Well now you don't have to be kept in the dark. At least not as far as how to help mushrooms keep their cool.

Resulting from a couple of recent requests for help from valued clients a piece of research conducted by Mistral revealed that more than just a few users of Coldwind Pro have helped mushroom growers' businesses over the years. And whilst the thermal properties of mushrooms have been included in Mistral's Coldwind Pro's 'Food Products' databases for decades, the medium mushrooms are cultivated in has not.

Further research revealed that right across Europe and North America, what is described as Mushroom Compost generally consists of similar ingredients. That is:- Alfalfa hay, Cattle or horse manure, Corn stalks, Oat straw, Poultry litter, Sawdust and wood shavings, Silage, Soil, Soybean, Wheat straw. Naturally there are regional variations and also varying proportions of ingredients. However the basic principal and composition of the compost mixture is roughly the same.

Mass (weight in kilograms per cubic metre) turns out to be generally around 370 kg/m. Much lower than for damp soil for example and which can be as high as 1,700 kg/m

mistral compost Mistral has therefore been able to estimate 'mean (high) average' properties for mushroom compost and which should be safe for all practical commercial purposes. This data has now been added to Coldwind Pro's Food Properties database; under the 'Miscellaneous' group heading.

Cost to Mistral of researching, compiling and proving database edit: Over 800 Euros.

No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Associates - News August 2018

Improved flexibility in Coldwind Pro Product selections

For more than 25 years Coldwind, along with its later professional feature enhanced version Coldwind Pro, have had minimum Product turnover limits set at 2 kg per cubic metre room volume per cycle. This of course to protect program users from inadvertently or mistakenly including product loads far too low to reflect likely usage. However, the lower limits, as low as they were nonetheless frustrated attempts to add and accumulate a mixture of additional products from which the overall calculation result might benefit.

As shown in the above example where although the principal product load might be attributed to wine, calculation accuracy would be enhanced by simultaneous calculation of the load for the bottles in which the wine is contained, the cartons in which the bottles are contained and finally the pallets or stillages upon which the wine cartons are placed. There are of course hundreds more product storage situations where this applies.

Although probably not making much difference for a 1,000 cubic metre cold store, experience has shown this calculation enhancement becomes much more important in examples of super sized distribution centres of 40,000 cubic metres, 80,000 cubic metres and more recently some of even more than 120,000 cubic metres.

Mistral's expert system software is constantly evolving to meet new challenges in the industry.

Cost to Mistral of researching, compiling and proving database edit: Over 3,300 Euros.

No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Associates - News July 2018

Tecumseh New Wintsys housed condensing units.
New interactive selection databases added.


Tecumseh claim their New Wintsys range of housed, outdoor condensing units will bring benefits of:-

Mistral Gold StarOn-site time saving
Mistral Gold StarProductivity
Mistral Gold StarEconomic operation
Mistral Gold StarHigh efficiency
Mistral Gold StarRefrigerant compliance
Mistral Gold StarImproved competitiveness
Mistral Gold StarVisually pleasing housing design


Tecumseh's New Wintsys condensing unit range are assembled in France.

Cost to Mistral of researching, compiling and proving databases: Over 1,300 Euros.

This database, one of more than 17,000 interactive databases in Mistral's complete systems, was sponsored by Hawco Refrigeration of Godalming, Surrey, United Kingdom.
Tel Sales: O1483 8691OO


No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.


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Mistral Associates - News June 2018

PIR Fire Resistant insulation materials added

PIR Fire Resistant insulation materials added to 'Coldwind Pro' Quick Selection 'Pre-engineered' cold room and freezer designs databases.

Cost to Mistral of new 'Quick Selection' database update development and proving: Over 2,000 Euros.


No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.


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Mistral Associates - News May 2018

Open Source software. A reminder!


Mistral has offered Open Source templates of in-house developed multi-relational databases from the firm's earliest days. Along with free access to Mistral's Treedb32.exe database creation and editing tool.

Exactly the same tools Mistral uses to create and maintain the tens of thousands of program interactive databases distributed with every issue of Mistral software. These are supplied with rudimentary* Help pages outlining critical code that is need to enable user created databases to be recognized by and run in Mistral programs. For example for selecting refrigeration and air conditioning capital equipment or for coldroom cost estimation and customer sales quotation generation.

Mistral will be happy to provide developers with a limited amount of advice and support at no charge. Providing developers have suitable qualifications or can demonstrate aptitude and experience in programming.

*Prospective code developers are assumed to already possess necessary programming skills. Mistral Associates cannot be expected to provide basic training. Novices are also warned that acquiring such skills comes neither easily nor quickly and can, indeed usually does, take years! Proprietary RAC equipment selection databases supplied with Mistral programs are locked and cannot be edited.

Manufacturers and distributors wishing to promote their products by reaching the vast majority of prospects already using Mistral's legendary RAC Application Engineering programs and relishing the chance to try their hand at programing therefore need look no further than the links below:-

RAC Equipment Selection Databases - Notes for Programmers.

RAC Equipment Selection Databases - zip file of sample open source database templates.

Download Mistral Treedb32.zip

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Mistral Associates - News April 2018


Another 21,948 new 'Quick Selection' coldroom & freezer designs

mistral quick selection 21,948 new files


mistral refrigerated food product animation Mistral has added another 21,948 new 'Quick Selection' coldroom & freezer designs to 'Coldwind Pro's' grid size room optional operating procedure. Bringing the number of almost instantly selectable pre-engineered coldroom & freezer designs to a total of 102,256!

Anyone claiming computer programs aren't necessary and that they can do the job faster is willing to try. Providing they can conduct over 175,000 intricate and inter-related calculations per second then they might stand a chance. If able to prove they are both faster and more accurate than 'Coldwind' Mistral will reward them with free program access - FOR LIFE!

Each design is in effect a complete 'pre-engineered' cold room or freezer design file and which has been created reflecting current industry specifications and design standards. These files can be opened, edited if required and re-saved. Behaving in exactly the same way as using 'Coldwind Pro' to produce a custom design.

So astonishingly simple and quick to select that most experienced 'Coldwind Pro' users generally take just ten to fifteen seconds to click on the 8 to 10 buttons needed to design a new coldroom or freezer from scratch. Then another ten seconds if they wish to automatically print out a detailed, presentation quality, illustrated summary report. Even users totally new to the program manage to unambiguously locate exactly the design they need in only a few seconds more.

mistral movie The best that an equally experienced and qualified refrigeration engineer could match 'Coldwind Pro' for accuracy and completeness of a similar design, armed only with a calculator and a few pages of tables, took a little over two hours! An even more interesting fact to emerge from Mistral's extensive field trials is that if the same engineer is asked to repeat exactly the same manual calculation exercise a second time around just a few hours later then they will invariably come up with a different result to their first attempt! A worrisome situation that simply cannot occur when using a correctly dynamically error trapped computer program like 'Coldwind Pro'.

So called 'Quick Selection Charts' published as useful aids by many RAC equipment manufacturers and distributors have been shown to overestimate refrigeration loads by anything from 10% to as much as 30% when compared to Mistral's proven computerised calculations. Not surprising so many major 'End User' specifiers now insist their approved RAC contractors adopt Mistral's 'Coldwind Pro' to size their cold room and freezer projects!

click above image to discover whether you're wasting money!

Cost to Mistral of new 'Quick Selection' database update development and proving: Over 4,000 Euros.


No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Associates - News March 2018


Reduced rate annual subscription for sole traders


mistral_modules Mistral's trial reduced rate annual subscription for sole traders and single user licensees has now been made permanently available.

Following a highly successful trial launch in December 2017 Mistral's new 'Subscription' licence product, offers identical benefits to the long established and popular 'Corporate Licence' except it is now offered for smaller business users, sole traders, independent consultants and students.


A substantial 67% saving against previous price!

Click here:- Annual Subscription for immediate purchase and same day* complete system download and access.
* Within 24 hours. Please be aware of international time zone differences from CET.

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Mistral Associates - News February 2018


r513a Refrigerant R513A (Opteon TM XP10) non-ozone depleting, low global warming potential (GWP) added to Pipewind Pro - Professional RAC pipe sizing program.

Ideal successor to R134a for medium/high temperature applications.


No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.


R513A interactive database. Cost to Mistral of data processing, compilation and proving: 1,750 Euros.

One of more than 17,000 independently verified, interactive databases available to Mistral Corporate Licensees. World's largest independent collection.

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Mistral Associates - News January 2018


New interactive database for Lu-Ve Contardo commercial range of coolers


lu-ve logoA world leading and highly regarded refrigeration equipment manufacturer.


mistral lu-ve program menu


Mistral's proposed new interactive databases for selections from Lu-Ve Contardo's commercial range of coolers will be an operating conditions sub divided grouping comprising 'drill down' to 138 individual product sub-databases. By the time all options and currently available refrigerant data are considered.

All levels accessible through maximum of three button clicks from opening of main database.

Estimated databases total size from 3.0 to 3.4 mBytes.

Following successful proving Mistral's release date is aimed for mid February 2018.*
*Now released. Sunday 18 February 2018.
Free download from this page for all Mistral 'Corporate Licence' subscribers. mistral lu-ve cooler


Cost to Mistral of Lu-Ve Contardo databases development and proving: 8,500 Euros.


No charge update for all Mistral 'Corporate' Licensees:- Corporate Update link
A new Corporate Access Registration Code may be required for older installations (8 weeks +) but this will be automatically forwarded when required.

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Mistral Associates -News 01 July 2016 to 31 December 2017

2017 saw the culmination of an 18 month critically important recoding project. Affecting all 12 Mistral main program engines. New program families were rolled out from early July to end of December 2017.

Changes to program installation and to file and database saving procedures.



Mistral Associates - Really old news

Mistral MD Real Mistral sales story from 1998.

Sometimes friends need a little help before they can see the wood for the trees!

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