Insulation is done and Sam from Retrotec is here to help Steve get a first update on the Boston project’s blower door score. Learn all about the process of running a blower door test and input from Steve on why you need these numbers on your projects.
Compare heat pumps by efficiency (SEER2, HSPF2) and certified heating and cooling output, not just size class, with tools to check quotes, verify rebate qualifications, and calculate your heating and cooling needs.
This free HVAC exam math guide covers airflow, temperature rise, and capacity conversions, with seven worked examples, source links, and notes on the assumptions behind the formulas.