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License verified · NJ HVACR Board

John D Guderian

Verification ledger

What we checked, and what we didn't

Checked against the register at build time (Oct 31, 2026).
New Jersey contractor licenseNew Jersey Division of Consumer Affairs, State Board of Examiners of HVACR Contractors · number 19HC00350800 · expires June 30, 2028 · Morris County. Matched to this business on name.Verified
Business contactemail on file.On file
Public reviewsNo public review profile in our data. License-register listings often have none — ask for two recent local references instead.None found
Insurance & bondingNot checked by AirProHQ. Ask for the certificate of insurance before work starts — the state requires cover to hold the license, but we don't see the policy.Ask them
WorkmanshipNot inspected. A license says who is allowed to do the job, not how well it was done.Ask for references
Checked against the register at build time (Oct 31, 2026). Confirm it yourself — about thirty seconds. See our full verification methodology.Open the official lookup
About

John D Guderian, in brief

Based in Rockaway, NJ, John D Guderian works as an HVAC contractor. NJ HVACR Board records show license 19HC00350800 on file for this business through June 2028.

HVAC contractor
Questions about this contractor

Before you call John D Guderian

01

Has John D Guderian's contractor license been verified?

Confirmed — the NJ HVACR Board register carries license 19HC00350800 for this business with an expiry of June 30, 2028. See it yourself via the official license lookup.

Sources: New Jersey Division of Consumer Affairs, State Board of Examiners of HVACR Contractors register.Report a correction
Alternatives

Other HVAC contractors near John D Guderian

Nearest listings we hold in Rockaway. Same license check on every one.