Best free resources for HERS prep — what's actually worth your time

Same experience here. The hers hvac system evaluation was what finally made it click for me — specifically the way it explains the reasoning rather than just giving answers. Took me 2 weeks of consistent practice but scores went from 66% to 83% by exam day.

For the people asking about study timelines: I studied 85 minutes per day for 10 weeks working full time. It's absolutely doable without burning out. The key is consistency — missing days hurts more than extending your timeline.

This is exactly the thread I needed. I sit for my HERS in 3 weeks and have been second-guessing my prep. The exam prep area you mentioned is definitely my weak spot. Thanks for the honest breakdown.

Just passed last month and honestly the thing that clicked for me was getting really specific with practice questions instead of re-reading the manual over and over. I spent way too long on general HVAC review when the exam is heavily weighted toward field procedures. Once I started drilling hers duct leakage testing questions specifically, my confidence went up fast because that's a huge chunk of what they actually test you on.

The free stuff is genuinely enough if you use it right. Don't skip the calculation practice even if it feels tedious, it's worth it when you're sitting in the test and a blower door question pops up that you've already seen three variations of.

Just hit a 78% on my last practice run, which honestly surprised me since I didn't feel ready at all going into it. I've been using the free study guide materials and drilling the weak spots — specifically spent a lot of time on hers duct leakage testing because that section was killing my score. Planning to sit the real exam in about three weeks if I can keep the momentum going.

Wasn't expecting the free stuff to be this solid but it's genuinely been enough to move the needle. If you're in the same boat just keep hitting the practice tests and review anything under 70% until it clicks.