About Us

Who We Are

Energycalcs.net is an independent energy calculation company owned by Maggie Sims, a certified RESNET (Residential Energy Services Network) HERS Rater and has been in business since 2011. Co-Owner Gary Altman, has been in HVAC and building industry for 50 years. He is currently a Florida licensed AC Contractor, who is also DET Certified (Duct and Envelope Testing), certified to conduct blower door infiltration testing and duct leakage testing for indoor air quality consultations and energy audits. Gary is also a current member of BOAF (Building Officials Association of Florida).

Our services include, but are not limited to:

  • New constructions
  • Residential and light commercial heat load calculations: Manual J & Manual N
  • Manual S equipment specification form
  • Manual D duct design for residential and light commercial HVAC systems
  • New residential and light commercial energy calculation forms: form 405-2010 residential / form 506-2010 commercial
  • HVAC sizing
  • Duct leakage testing
  • Blower door performance testing
  • Energy efficiency consulting
  • Air tightness testing
  • RESNET HERS home energy ratings new & existing
  • Site visit testing

…and much more!

Our home performance services include blower door testing for overall home leakage and duct leakage testing. Our HERS ratings for new residential homes include 2 site visits to the home, 1 after insulation installation and 1 after the home is complete. The second visit will includes a blower door infiltration test and duct leakage test.

Home energy ratings and site visit testing are limited to Central Florida and Savannah, Georgia areas. All other services are performed nationwide!

Any questions?

Call us today at (386) 456-8492!

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