1. Ground Source Heat Pump Benefits
Key exam domainIdentify weak areas and improve with focused review.
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Pass the Certified Residential Geothermal Designer exam with confidence.
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Practice the CRD exam by domain
2. System Components
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing3. Heat Pump Types
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing4. Design Process
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing5. Energy Requirements
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing6. Load Calculations
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing7. Parameters that affect different types of heat pump performance, site, geology and soil conditions
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing8. Heat pump and pipe design
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing9. Economics of design
Key exam domainIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the CRD exam, the questions, pricing, the free trial, and how this fits your prep.
The CRD exam spans 9 domains - Ground Source Heat Pump Benefits, System Components, Heat Pump Types, Design Process, Energy Requirements, Load Calculations, Parameters that affect different types of heat pump performance, site, geology and soil conditions, Heat pump and pipe design, and Economics of design. Every practice question maps to one of them, so you train on exactly what's tested.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the CRD exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. CRD Exam Prep is an independent study resource for Certified Residential Geothermal Designer (CRD). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.
Every paid plan unlocks the full bank of 1,000+ practice questions covering all 9 CRD domains - Ground Source Heat Pump Benefits, System Components, Heat Pump Types, Design Process, Energy Requirements, Load Calculations, Parameters that affect different types of heat pump performance, site, geology and soil conditions, Heat pump and pipe design, and Economics of design. You can practice the whole bank, filter by domain, or run a timed, domain-balanced exam simulation.
Yes - the bank is maintained against the current exam outline, and questions are revised when the exam changes.
No honest practice platform can guarantee a pass. What realistic practice does is show you - before exam day - exactly which domains are weak, and give you the repetitions to fix them. That's the difference between hoping you're ready and knowing where you stand.
Yes. You get 10 free sample questions with instant feedback - no credit card and no account required.
The free sample shows you the question quality. Paid plans unlock the full 1,000+ question bank, exam-style practice modes, mistake review, and - on Fast Track and Pass Confidence - progress analytics that show your readiness by domain.
No. Every plan is a single one-time payment for a fixed access window - 48 hours, 7 days, or 6 weeks. There is no auto-renewal and no recurring billing.
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Every answer feeds your per-domain accuracy, readiness score, and weak-area list. Instead of re-reading everything, you drill the domains that are actually costing you points - that's what moves a score in days, not months.
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Trusted by CRD candidates
Real feedback from CRD candidates on Reddit.
"put off studying for weeks then crammed the practice questions on load calculations over a weekend. wasnt confident going in but the questions matched the real exam style close enough that it clicked. passed, barely remember the drive home honestly."
"i was skeptical this would actually prep me for soil and geology stuff since thats not my background, im more install side. the mistake review after each quiz helped me see where i kept mixing up loop design assumptions. recieved my results faster than expected too."
"residentialexam.com was the only thing that made the economics of design section make sense to me. did the mock exams twice, second time scores jumped alot. no stress going into test day which was a first for me tbh."