Run a free full auditLong Hill Energy is an HVAC provider in Clinton, CT, located at 20 Lumberyard Rd. The company handles heating oil delivery in and around Connecticut, supplies on and off-road diesel fuel, and provides home heating oil and propane. It offers heating and air conditioning services including tune-ups, new installations, and oil tank replacements. Serving the Connecticut shoreline for over 30 years, the business provides partial coverage to Deep River, Chester, and North Branford, with some exceptions. It holds a 5.00 rating based on customer reviews.
Long Hill Energy began as a single truck discount oil delivery company in the early 1980s. In 1987, the Flagge family purchased the company, making it the oldest discount oil company serving the Connecticut shoreline. The company changed its name from Long Hill Oil to Long Hill Energy to represent a broader range of services. Its facility in Clinton houses the office, a fleet of oil and service trucks, and a bulk storage plant. All heating oil is treated at the storage facility with an additive package designed to provide optimum efficiency, avoid service calls, reduce fuel consumption, and extend the life of heating systems.
The business offers automatic delivery at no charge and provides tank monitoring services. It repairs and replaces all types of heating and air conditioning systems, providing free estimates for new equipment or oil tank installations. A wide range of service contracts is available to cover parts and labor on equipment, with many contracts including yearly tune-ups. Long Hill Energy continues to offer prepaid fixed price programs for a designated quantity of oil during winter months and provides budget plans to help customers save for the winter. To cancel automatic delivery, customers must contact Lisa at (860) 664-3835 and speak with her in person; withdrawal via telephone message is not acceptable.
Long Hill Energy is known for its positive rating from the customers who have reviewed it, reflecting a reputation for quality service and competitive pricing in the local market.
Long Hill Energy brings decades of experience in heating oil delivery and HVAC services to the Clinton community, ensuring reliable warmth and comfort for local residents.
Located on Lumberyard Rd, the business sits just steps from West Main Street and is about half a mile from the Clinton train station and the Clinton Post Office.
BizScoreAI gives the website a Technical score of 94 out of 100, ensuring it is secure and readable for search engines. It also achieves a Discoverability score of 75 out of 100, which allows AI crawlers to find every page so the business can be recommended by AI assistants.
BizScoreAI scanned the website longhillenergy.com on July 2, 2026. Long Hill Energy has a BizScore of 52 out of 100. The website audit behind the SEO score ran on October 28, 2026.
AI visibility scan by category: AI Discovery 10 of 25 points, Structured Data 0 of 25 points, Content Readiness 11 of 30 points, AI Trust Signals 12 of 20 points.
Website audit sub-scores (out of 100): On-Page 80, Technical 98, Performance 91, Content 33.
Strengths: 5 checks passed. AI Crawler Access, AI Content Blocking, Google Business Profile Link, About/Team Page, XML Sitemap.
Areas to improve: 13 checks. llms.txt (failed), FAQPage Schema (failed), LocalBusiness Schema (failed), Third-Party Review Links (failed), Content Too Thin (failed), Organization Schema (warning), Speakable Schema (warning), Hyperlocal Targeting (warning), Local Multimedia (warning), Q&A Content (warning), AI-Parseable Headings (warning), Meta Description (warning), Author Signals (warning).
Browse: Businesses in Clinton, CT · HVAC in Connecticut · Businesses in Connecticut
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