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Guides

No gaslighting: radon, explained

Short answers for lenders, owners, and property managers. Each guide ends at the quote form when you have a live deal.

Modern multifamily building with rooftop solar panels and a planted courtyard under a clear sky

Green certifications

Radon testing and green certifications on multifamily deals

How multifamily radon testing fits FHA and Agency diligence when green certifications and healthy-building goals are on the table. Links to NOI Engineering for green certification support.

September 16, 2026

Desk with building plans, a notepad, and a radon detector before devices go out

Test strategy

Build a multifamily radon testing strategy before devices go out

Why a property-specific radon testing strategy belongs in diligence before devices ship, and how that plan saves the Borrower time and money if mitigation is later required.

September 9, 2026

Stylized United States map with city skylines used for nationwide scheduling

Scheduling

Nationwide scheduling for multifamily radon testing

How nationwide multifamily radon site visits get scheduled around a closing calendar, what deal teams should send, and why a local-only tester slows FHA and Agency files.

September 2, 2026

Apartment living room with windows closed and blinds down during a radon test

Protocol

ANSI/AARST closed-building conditions for multifamily radon tests

What closed-building conditions mean on a multifamily radon test, how ANSI/AARST guidance shapes placement and retrieval, and what to tell site staff before devices go out.

August 26, 2026

Side-by-side view of a single-family house and a multifamily apartment building

Multifamily vs SF

Multifamily vs single-family radon testing

Why multifamily radon testing is a different protocol from a single-family home kit, and what lenders, owners, and brokers should send when the asset is apartments.

August 19, 2026

Multifamily mechanical room with HVAC equipment, ductwork, and piping

Elevated results

Elevated multifamily radon results and the mitigation path

What happens after an elevated multifamily radon result: local mitigation partners, bids for the property, and review against FHA or Agency program requirements.

August 12, 2026

Multifamily courtyard with trees, seating, and apartment balconies

FHA & Agency

FHA and Agency multifamily radon diligence

What FHA MAP and Agency reviewers expect from multifamily radon testing, when it sits on the closing calendar, and how to scope a protocol without surprise fees.