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Your Trusted HVAC Partner in Guilford, CT
Madison Oil has been dedicated to providing comprehensive heating, cooling, and fuel oil delivery services since merging with J.J. Sullivan in January 2016. As a family-owned business, we prioritize personalized service and limit our operations to Madison, Clinton, Killingworth, and parts of Guilford, CT, ensuring timely responses and reliable support. Our team of licensed technicians offers 24-hour emergency service, annual efficiency check-ups, and professional installation of heating systems, including oil, propane, and natural gas solutions.

We emphasize preventative maintenance through our Comprehensive and Premium Service Plans, which cover parts and labor for system longevity. Our commitment to advanced training and cutting-edge technology ensures optimal system efficiency, saving customers money while maintaining comfort. We provide free in-home estimates and transparent project budgeting, standing by our work long after installation. Customer satisfaction remains our priority, reflected in our local expertise and dedication to community service.
Services
HVAC Installation Annual Efficiency Check-Up Fuel Oil Delivery Equipment Repair Service Plans
Highlights and features
  • We offer 24/7 emergency HVAC service for urgent needs.
  • Family-owned with deep local expertise in Connecticut communities.
  • Comprehensive service plans cover parts and labor for system longevity.
  • Licensed technicians trained in the latest oil heat technologies.
  • Free in-home estimates with transparent project budgeting.
Services
HVAC Installation
Madison Oil installs high-efficiency oil, propane, and natural gas heating systems, including boilers, furnaces, and air conditioning units. Our licensed technicians ensure proper setup and performance, offering upgrades that reduce energy costs. We service all equipment we install, providing long-term reliability and comfort tailored to Connecticut's climate.
Annual Efficiency Check-Up
Our annual efficiency check-ups optimize heating systems through cleaning, tuning, and safety inspections. Using advanced tools, we analyze flue gases and combustion efficiency, potentially saving 10% annually on fuel costs. This service extends equipment lifespan and prevents costly breakdowns during extreme weather.
Fuel Oil Delivery
Madison Oil offers automatic and on-demand fuel oil delivery to residential customers. Our Surrephyre 3000 system ensures timely refills, preventing shortages. We serve Madison, Clinton, Killingworth, and Guilford, CT, with reliable logistics and competitive pricing plans for consistent home comfort.
Equipment Repair
We provide emergency and scheduled repairs for all heating system components, including burners, pumps, and thermostats. Our technicians carry specialized tools for prompt diagnostics and fixes, minimizing downtime. Coverage under service plans includes parts and labor for common wear-and-tear issues.
Service Plans
Our Comprehensive and Premium Plans cover annual efficiency check-ups, emergency service calls, and replacement of worn parts. The Premium Plan extends coverage to major components like circulator pumps and heat exchangers, offering financial allowances for equipment replacements to ensure long-term system reliability.
People
Bill Carroll
Owner
Bill Carroll co-owns Madison Oil, overseeing operations and customer service. With decades of experience in the heating industry, he ensures personalized solutions and maintains the company's tradition of reliability and community focus.
Angela Carroll
Owner
Angela Carroll partners with Bill in managing Madison Oil, emphasizing customer relationships and operational excellence. Her leadership supports the company's commitment to local service and technical expertise in HVAC solutions.
Questions
What areas does Madison Oil service?
Madison Oil serves Madison, Clinton, Killingworth, and parts of Guilford, CT, ensuring localized, responsive heating and cooling support.
Do you offer emergency HVAC services?
Yes, we provide 24/7 emergency service for heating and cooling system failures, with technicians available at (203) 245-2239.
What service plans are available?
We offer Comprehensive and Premium Plans covering annual maintenance, emergency repairs, and replacement of covered parts due to normal wear.
What heating systems do you install?
We install oil, propane, and natural gas boilers, furnaces, and air conditioning systems, prioritizing energy-efficient models for long-term savings.
Can I schedule a free estimate?
Yes, Bill Carroll provides free in-home estimates with detailed project budgeting to help plan your heating system installation or upgrade.