HOME OF "OFF-THE-CHARTS"
EQUIPMENT SELECTION AND OPTIMIZATION SOFTWARE
THIS IS AN
ACCA MANUAL S
With only a 2.3% average calculation error
THIS NEW PRODUCT VERSION (release v.23.90.10) ONLY DIFFERS FROM THE PRE - SEER1 RELEASE, WITH NEW LIABILITY WARNINGS (and some minor appearance items)
DO NOT USE OFF-THE-CHARTS (OTC) WITH THE NEW 2023 AHRI M1 RATINGS!!
OTC WAS CREATED FOR THE AHRI 210-240/2017
M RATING METHOD USED FOR THE LAST 70YRS.
BECAUSE OF 2023 DOE CHANGES, TO A RADICALLY NEW 210-240 2023 METHOD WERE JUST MANDATED THAT JANUARY, ONLY THE 210-240 2017 AHRI RATING STANDARD WERE EVER TESTED WITH THE CURRENT OFF-THE-CHARTS PRODUCT. With OTC YOU MUST VERIFY YOUR EQUIPMENT SELECTION ON THE ARHI WEBSITE STILL SHOWS RATINGS UNDER THE STANDARD 210-240 2007 (M) COLUMN, AS SHOWN BELOW, OR A "YES" UNDER THE "DESIGNATED TESTED COMBINATION" COLUMN.
DO NOT USE ANY DATA FROM THE 210-240 2023 (M1)
COLUMNS, (see AHRI directory screenshot below) WITH THE Off-the-Charts
PRODUCT!!! RESULTS WILL NOT BE COMPLIANT TO ACCA MANUAL S METHOD, AND THE HVAC
CONTRACTOR ALWAYS BEARS THE LIABILITY ON THIS.
THE GOOD NEWS IS THIS NEW RATING MAY NEVER TAKE ROOT, CONSIDERING A DIRECTORY SEARCH OF A MAJOR BRAND'S ENTIRE LISTINGS, ONLY RESULTED IN THESE 6 "TESTED" NEW STANDARD RATINGS OUT OF 194,794 TOTAL RESULTS!
Use this link to AHRI directory for verification.
-------------------------- END OF DISCLAIMER -----------------------------------
For Off-the-Charts in a nutshell;
watch one-minute You-Tube promo
for educators",click here:
THIS IS A UNIVERSAL CONTRACTOR MODELING SPREADSHEET"
1. Why would I need "Manual S"?
ICC code dictates it.
2. What's it for?
It's used AFTER the load calculation, to select equipment.
3. Why not just use the model # ?
Model numbers only roughly give a clue on BTU capacity.
5. Usn't AHRI giving the capacity?
AHRI rating is nominal, like a MPG sticker on a car.
4. Who's going to know anyway?
The home occupant may not get the correct size unit and comfort. This is really just the 2nd half of load calculation.
5. I think I have Manual S in my software already, why pay for this?
BECAUSE NOBODY DOES THIS
BETTER! WE DID IT FIRST,
YOU CAN FACT-CHECK THAT!
We have found current popular software is time consuming, over complex to use, missing pieces of ACCA's guidelines, and NOT compliant to their manual. Some just crudely added the feature recently by R&D (rip-off & duplicate), just to compete with OTC.
(They are an insult to ACCA's intent, and
are missing the best features of Mr. Rutkowski's Manual S)
5. Why did you make this program to require Microsoft Excel?
ACCA's original hand-filled forms were all in tables, and since Excel was created (like old Lotus 1-2-3) to make powerful tables, it was just common sense to use it. We will eventually create this as a standalone product, used by any device with an internet browser, but we have not found an economical and efficient utility to make that happen yet. (OR ANY CODE WRITERS WHO WOULD LIKE A PIECE OF THIS ACTION!)
not approved by ACCA Manual S
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