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1982 - 2023
38
Years of
EXCELLENCE
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HVAC-Calc, the easy to use Heat Loss and Heat Gain Calculator, residential and commercial.
................. Table of Contents ................
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Click Here to Download a Free Trial
View a Movie for Download help.
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Place an Order 
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NEW! See our library of Instructional Videos! 
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Interesting! - Read what others say about our HVAC-Calc programs
In our "Quotes Hall of Fame"
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Take a Guided Tour of the Program
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Who We Are, and what we've done before.
Carrier E20-II, York SmartChart, Rheem, RUUD, Lennox Logic Jr. II, Armstrong
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"HVAC for Idiots" Read an independent Review at WorkBench Magazine
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"Residential Heat Loss and Heat Gain" Read an article by Don Sleeth
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Features of HVAC-Calc 4.0
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Free air conditioner sizing chart ;-)
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Our Humour Page, clean fun, take a break
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Updates for our Customers
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Front Page, A good one to bookmark
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Questions? For More Info, Call
1 888 736-1101
Toll Free!
10:00 a.m. to 8:00 p.m 7 days/week
Don Sleeth
HVAC Computer Systems Ltd.
613 233-1101
888 736-1101
don@hvaccomputer.com
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