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Home of Off-the Charts* 
(FOR WHOLE SYSTEM DESIGN CD-ROM CLICK HERE)
ACCA manual S            
                                                                                                                                                                              

KR Services
Infrared
System Design
HVAC Tech

Off-the-Charts "CONTRACTOR MODELING SPREADSHEET" (OTC),
AN ALTERNATIVE METHOD TO
ACCA'S MANUAL S, 
FOR RESIDENTIAL HVAC 
EQUIPMENT SELECTION
* Patent Pending

(only for use AFTER a residential load calculation is performed)

No Expanded Data charts needed!

HERE'S HOW REPORT FOR EACH SYSTEM PRINTS: 


Version detail, install trial, purchase or update:
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Why Use OTC instead of ACCA method?
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Videos for program usage   
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The science of "Equipment Selection"  
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Compliance of OTC with Codes
and Other Standards 

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Frequently Asked Questions about OTC
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Using OTC with Elite's Rhvac program  
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not approved by ACCA Manual S

 

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5-14-16

 

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