1. IAQ Contaminants and Potential Health Effects
Key exam domainIdentify weak areas and improve with focused review.
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Free CIE Practice Test
Pass the Council-certified Indoor Environmentalist exam with confidence.
Start with a free CIE practice test and build exam-ready confidence for the Council-certified Indoor Environmentalist exam.
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Practice the CIE exam by domain
2. Principles of Building Science & the Built Environment
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing3. HVAC
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing4. Equipment Selection, Calibration and Operation
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing5. Guidelines, Regulations and Standards
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing6. Remediation
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing7. Respiratory Protection
Key exam domainIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the CIE exam, the questions, pricing, the free trial, and how this fits your prep.
The CIE exam spans 7 domains - IAQ Contaminants and Potential Health Effects, Principles of Building Science & the Built Environment, HVAC, Equipment Selection, Calibration and Operation, Guidelines, Regulations and Standards, Remediation, and Respiratory Protection. Every practice question maps to one of them, so you train on exactly what's tested.
The Council-certified Indoor Environmentalist (CIE) exam has 100 questions and is completed in 3 hours. Our timed practice tests mirror that length and pacing, so exam day feels familiar.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the CIE exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. CIE Exam Prep is an independent study resource for Council-certified Indoor Environmentalist (CIE). 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 7 CIE domains - IAQ Contaminants and Potential Health Effects, Principles of Building Science & the Built Environment, HVAC, Equipment Selection, Calibration and Operation, Guidelines, Regulations and Standards, Remediation, and Respiratory Protection. 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.
Match it to your exam date: Final Review (2 days) for an exam in the next day or two, Fast Track (7 days) for an exam this week, Pass Confidence (6 weeks) for a structured run-up.
For most countries, the price you see is exactly what you pay - tax is already included. Where local law requires it to be added separately, it's shown clearly at checkout before you pay, so there are never any surprise fees.
Access is instant after payment and runs for your plan's full window from that moment. When the window ends, your local progress stays on your device - you can buy another window any time and pick up where you left off.
Yes - the whole platform is mobile-first: practice, mistake review, and analytics all work on any phone, tablet, or laptop with a browser. Nothing to install.
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 CIE candidates
Real feedback from CIE candidates on Reddit.
"passed last week. was pretty behind going in, barely cracked a book till like 3 weeks out. the practice questions on ciestudy.com saved me, especially the respiratory protection section, that stuff never sticks for me otherwise."
"honestly went into this exam pretty skeptical of prep sites in general, feel like most are just recycled questions with no explanations. this one actually broke down why wrong answers were wrong, which helped alot with the remediation stuff. glad i used it."
"took the mock exams a couple times before test day and that alone calmed my nerves. still almost ran out of time on the real thing but passed. the hvac equipment questions felt close to what i actually got."