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<-- (Home page of this product's parent company is here)
(To go directly
to install OTC trial, purchase or update: Click the star   )
Currently Version 25.30.5
NEW
DUAL-SEER RELEASE NOW AVAILABLE
THIS IS A DESKTOP PRODUCT,
COMPLIANT TO ACCA MANUAL S
IT IS AN "OTHER APPROVED METHOD", AS REQUIRED PER ICC,
FOR RESIDENTIAL HVAC CAPACITY MATCHING.
THIS
NEW PRODUCT VERSION (Off-the-Charts2SEERS) HAS THE
SAME SEER1 USAGE, BUT NOW CAN WORK THE SAME FOR SEER2 RATINGS WITH ONE CLICK, SELECTED FOR EACH SYSTEM.
(OTC
WAS INITIALLY CREATED FOR THE AHRI 210-240/2017
M RATING METHOD, USED FOR THE LAST 70YRS.)
OTC is the PREMIUM "Other approved software" referred to
in ICC codes,
and is also the most true to ACCA Manual S guidelines, PROPERLY and quickly,
wherever ICC code mandates are enforced. These require only to be
"approved"
by the building official.
IT IS THE FIRST, AND ONLY SOFTWARE MADE WITH
CARE TO BE FAITHFULL TO THE INTENTS OF ACCA'S MANUAL S AUTHOR, HANK
RUTKOWSKI.
UNLIKE SOME OTHERS, OTC MAKE'S NO MOCKERY OF HIS HARD WORK!
You get confirmation of the the best matched systems, AND the proper configuration
settings YOU need for them, for maximum comfort anywhere in America.
With only a 2.3%
average calculation error still on SEER1, and shrinking 2.9% on SEER2,
(and much less opportunity for human error),
it has never been rejected, and is trusted, even by "strict" building officials.
----------------------------------- DISCLAIMER
WARNING ---------------------------
YOU CAN
STILL USE PRIOR VERSIONS OF OTC (v14.41) FOR SEER1. BUT NOT SEER2.
(THE NEW
mandated 2023 SEER2 AHRI RATINGS!)
BECAUSE JANUARY 2023 DOE CHANGES TO A RADICALLY NEW 210-240 2023 METHOD WERE
JUST MANDATED, ONLY THE 210-240 2017 AHRI RATING STANDARD WERE EVER TESTED WITH THE CURRENT
OFF-THE-CHARTS PRODUCT UNTIL NOW. With OTC YOU MUST VERIFY YOUR EQUIPMENT
SELECTION
ON THE ARHI WEBSITE, STILL SHOWS RATINGS UNDER THE STANDARD 210-240 2007 M COLUMN (GREEN
CIRCLE), AS SHOWN BELOW, OR THE M1 (RED CIRCLE) UNDER THE "DESIGNATED"
TESTED TYPES.
DO NOT USE ANY DATA FROM
SEER2 210-240 2023 (M1) COLUMNS, (see AHRI directory screenshot
below) WITH ANY Off-the-Charts PRODUCT PRIOR
TO 24.41! RESULTS WILL NOT BE COMPLIANT TO ACCA/AHRI/DOE GUIDELINES, AND THE
INSTALLING CONTRACTOR ALWAYS BEARS THE LIABILITY ON THIS.
KR SERVICES, dba KR-SERVICES-COM LLC, and it's vested owners or users would be
held-harmless in such situations.
THE GOOD NEWS IS,
REGARDLESS WHETHER OR NOT THIS NEW RATING STAYS WITH US, NOW YOU HAVE THE ABILITY TO USE
OTC FOR IT!
Use this link to AHRI directory
for verifications.
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For Off-the-Charts in a nutshell;
Click
here to watch one-minute You-Tube promo
We are open to inquiries from capital investor(s). The seeds of OTC were planted nationwide,
and common sense could take root very soon.
(For "Off-the-Charts©
for educators",click here:
College Instructors and Professors of HVAC)
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THIS IS A UNIVERSAL CONTRACTOR MODELING TOOL.
For pity's sake, why is our industry stuck
on stupid? Everyone just does their own thing with this, even with the fancy $$
load-calc software.
EVEN THE NEW "ONLINE" EQUIPMENT
CALCULATORS OFTEN DON'T MATCH THEIR OWN PRINTED DATA! TRY IT.
We hear you ask:
1. Why would I ever need "Manual S"?
ICC code dictates it. The majority of
States enforce 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 barely give a clue on real
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 THIS FIRST, YOU CAN
FACT-CHECK THAT!
NO ONE ELSE HAD A CHART-LESS "MANUAL- S" IN THEIR PRODUCT IN 2012, UNTIL THEY
SAW OFF-THE-CHARTS, AND
THEN JUST GAMED THEIR PRODUCT TO KEEP UP.
We find current popular software is
time consuming, over complex to use, missing pieces of ACCA's guidelines, and NOT
compliant to their intent. Some crudely added the feature recently by R&D (rip-off
& duplicate), just to compete with OTC.
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More frequently Asked Questions about
OTC (Click the star)
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The OTC method was presented at the 2019 HVAC
Excellence National Educators Conference, with good reviews, and the presentation is
available for purchase on thier website. Click star to see the PowerPoint presentation:
**************************************
Version detail, install trial, purchase or
update:
Click the star
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Why Use OTC instead of ACCA method?
Click the star
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Videos for program usage
Click the star
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The science of "Equipment Selection"
Click the star
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Compliance of OTC with Codes
and Other Standards
Click the star
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Using OTC with Elite's Rhvac program
Click the star
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approved by ACCA Manual S
3/21/25 | 
KR-Services-com LLC
