Insights

Longstanding Local Presence Leverage D.E. Duffey’s 125+ year history and local family-owned reputation to position tailored, reliable heating and cooling solutions for suburban Philadelphia, emphasizing trust and long-term service commitments.

Full-Service Provider Opportunity to upsell maintenance plans, service contracts, installations, and responsive repair services as a single-source solution for heating, cooling, and related systems.

Small Team Agility With a lean workforce, target efficiency-focused procurement and scalable service packages that fit a small-employee operation while offering dependable coverage and quick response times.

Mid-Market Positioning Position as a trusted regional supplier to compete with larger distributors by emphasizing personalized service, flexible terms, and local project management for heating oil delivery and system upgrades.

Growth Enablement Financials indicate mid-market revenue potential; propose value-added digital marketing, recurring revenue via maintenance contracts, and selective technology upgrades to improve customer retention and lifetime value.

D.E. Duffey Tech Stack

D.E. Duffey uses 8 technology products and services including Marchex, Open Graph, RSS, and more. Explore D.E. Duffey's tech stack below.

  • Marchex
    Analytics
  • Open Graph
    Content Management System
  • RSS
    Content Management System
  • oEmbed
    Dev Tools
  • Priority Hints
    Performance
  • PHP
    Programming Languages
  • TouchSwipe
    Web Tools And Plugins
  • prettyPhoto
    Web Tools And Plugins

D.E. Duffey's Email Address Formats

D.E. Duffey uses at least 1 format(s):
D.E. Duffey Email FormatsExamplePercentage
First@deduffey.comJohn@deduffey.com
100%

Frequently Asked Questions

What is D.E. Duffey's phone number?

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You can contact D.E. Duffey's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is D.E. Duffey's official website and social media links?

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D.E. Duffey's official website is deduffey.com and has social profiles on LinkedIn.

How much revenue does D.E. Duffey generate?

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As of August 2026, D.E. Duffey's annual revenue is estimated to be $1M - $10M.

What is D.E. Duffey's SIC code NAICS code?

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D.E. Duffey's SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 211 - Oil and Gas Extraction.

How many employees does D.E. Duffey have currently?

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As of August 2026, D.E. Duffey has approximately 6 employees across 1 continents, including North America. Key team members include Project Manager: T. C.Sales Associate: P. D.: D. D.. Explore D.E. Duffey's employee directory with LeadIQ.

What industry does D.E. Duffey belong to?

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D.E. Duffey operates in the Oil and Gas industry.

What technology does D.E. Duffey use?

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D.E. Duffey's tech stack includes MarchexOpen GraphRSSoEmbedPriority HintsPHPTouchSwipeprettyPhoto.

What is D.E. Duffey's email format?

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D.E. Duffey's email format typically follows the pattern of First@deduffey.com. Find more D.E. Duffey email formats with LeadIQ.

When was D.E. Duffey founded?

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D.E. Duffey was founded in 1898.
D.E. Duffey logo

D.E. Duffey

Oil and GasPennsylvania, United States2-10 Employees

D.E. Duffey, established in 1898 and based in Plymouth Meeting, Pennsylvania, operates as a family-owned oil and gas service provider focused on building long-term relationships with customers. The company delivers heating oil and a range of services including system selection, installation, maintenance, repairs, and service contracts, emphasizing dependable and consistent support for its clients. Serving the suburban Philadelphia area, it positions itself as a local, service-oriented business rather than a quick-transaction operation. With a small team, the firm emphasizes continuity, trust, and tailored assistance to meet customers’ heating and cooling needs over time.

Section iconCompany Overview

Phone number
SIC Code
7389 - Business Services, Not Elsewhere Classified
NAICS Code
211 - Oil and Gas Extraction
Founded
1898
Employees
2-10

Section iconFunding & Financials

  • $1M - $10M

    D.E. Duffey's revenue is estimated to be in the range of $1M - $10M

Section iconFunding & Financials

  • $1M - $10M

    D.E. Duffey's revenue is estimated to be in the range of $1M - $10M

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