What is the phone number for Certified National Service?

(234) 228-0146. You call Certified National Service directly; AssistAnt never sits in the middle.

Where is Certified National Service?

Certified National Service serves Youngstown, OH as a service-area business (no street address shown).

Is Certified National Service still in business?

Listed from public business records, last updated September 30, 2026. Call to confirm.

Is Certified National Service licensed and insured?

Not verified by AssistAnt yet. Ask for proof of license and insurance before you hire.

Who else is near Youngstown?

AssistAnt lists 88 HVAC companies near Youngstown. Closest to Certified National Service: National Heat Exchange Cleaning (2.1 mi), Gault Heating & Cooling (2.6 mi), Impeccable Air (2.8 mi).

Certified National Service · (234) 228-0146

AssistAnt › Pro directory › Youngstown, OH

What we do

Services

❄️Heating & air conditioning (HVAC)

Checked, with dates

🧾 Trust Card · 2 receipts

Listed in the AssistAnt 24/7 directoryBusiness record from Overture Maps open business data (CDLA-Permissive-2.0).
Sep 30
Shown as open for business in the source dataOperating status in the business record.
Sep 30

Not verified yet: Owner has not confirmed this listing yet; License and insurance not reviewed by AssistAnt yet; No AssistAnt job history linked to this listing yet.

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In their words

Customer reviews

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Where

Service area

Map of the Youngstown, OH area (© Google). Is this your business? Claim it and put up your own photos →

About Certified National Service

Certified National Service is listed on AssistAnt for heating & air conditioning (hvac) in Youngstown, OH.

Built from public business information. Call to confirm before you go.

Contact

Phone: (234) 228-0146
Website: cert-res.com
Location: Youngstown, OH, 44514 (service area)
Booking: Not bookable online yet. Call the business directly.

Listed from public recordsNot verified yet. Details come from open business data and may be out of date.See the Trust Card: what we checked, how and when →

Quick facts about Certified National Service

What is the phone number for Certified National Service?: (234) 228-0146. You call Certified National Service directly; AssistAnt never sits in the middle.
Where is Certified National Service?: Certified National Service serves Youngstown, OH as a service-area business (no street address shown).
Is Certified National Service still in business?: Listed from public business records, last updated September 30, 2026. Call to confirm.
Is Certified National Service licensed and insured?: Not verified by AssistAnt yet. Ask for proof of license and insurance before you hire.
Who else is near Youngstown?: AssistAnt lists 88 HVAC companies near Youngstown. Closest to Certified National Service: National Heat Exchange Cleaning (2.1 mi), Gault Heating & Cooling (2.6 mi), Impeccable Air (2.8 mi).

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AI Visibility Score

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What the AIs say

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Other HVAC companies nearby

National Heat Exchange CleaningYoungstown, OH · 2.1 mi
Gault Heating & CoolingPoland, OH · 2.6 mi
Impeccable AirBoardman Twp, OH · 2.8 mi
D&D Heating and AIR ConditioningPoland, OH · 3.0 mi
R V HeatingYoungstown, OH · 3.0 mi
W.W. Heating and Air ConditioningNorth Lima, OH · 3.3 mi

All HVAC companies near Youngstown, OH (88) →

Every trade and local freelancer in Youngstown →

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