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Frequently Asked Questions
Find answers to common questions about HVAC calculations and our tools
General Questions
Basic information about our calculators and how to use them
How accurate are these calculators?
Do I need to create an account to use the calculators?
Can I download or email my calculation results?
Are these calculators specific to Canada?
Technical Questions
Detailed information about HVAC calculations and terminology
What is a BTU and why is it important?
What's the difference between SEER, EER, and HSPF?
How do I know if my current HVAC system is properly sized?
What factors affect HVAC sizing the most?
For HVAC Professionals
Information about our professional tools and resources
How can I embed calculators on my website?
What professional resources are available?
Can I customize the calculators for my business?