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Verified Reviews for Heating Oil Service pros in Winamac, IN

*The Angi rating for Heating Oil Service companies in Winamac, IN is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating Oil Service needs.

*The HomeAdvisor rating for Heating Oil Service companies in Winamac, IN is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating Oil Service needs.

Last update on November 16, 2025

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Avatar for Geothermal Specialist, Inc.

Geothermal Specialist, Inc.

4.59(
24
)
•Approved Pro

Geothermal Specialist, Inc.

4.59(
24
)
•Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
42 years of experience

Geothermal Specialist, Inc. has serviced & installed close to 3000 geothermal systems in NW Indiana and SW Michigan since 1983. No one else in NW Indiana has the experience & service you'll find at GSI.

"They go out of their way to make sure the customer is happy."

Jacob S on March 2022

Geothermal Specialist, Inc. has serviced & installed close to 3000 geothermal systems in NW Indiana and SW Michigan since 1983. No one else in NW Indiana has the experience & service you'll find at GSI.

"They go out of their way to make sure the customer is happy."

Jacob S on March 2022

Avatar for Mainstream Works

Mainstream Works

No reviews yet

Mainstream Works

No reviews yet
14 years of experience

Mainstream Works will work as an independent contractor for all services performed. With over 30 years of experience in home building, remodeling, landscaping, and construction, Mainstream Works guarantees a successful project.

Mainstream Works will work as an independent contractor for all services performed. With over 30 years of experience in home building, remodeling, landscaping, and construction, Mainstream Works guarantees a successful project.

Heating Oil questions, answered by experts

Geothermal systems provide energy efficiency, lower utility bills, and long-term sustainability with minimal environmental impact.

Yes, technicians check refrigerant levels, loop performance, and system calibration for peak efficiency.

NATE-certified technicians may charge slightly higher service fees compared to non-certified technicians. This is because NATE certification signifies a higher level of expertise and professionalism, often leading to more efficient and effective HVAC repairs and installations. While the upfront cost may be marginally higher, NATE-certified technicians can potentially save you money in the long run by reducing energy consumption, preventing frequent breakdowns, and extending the life span of your HVAC system. When looking for a local HVAC company to hire, it never hurts to ask about NATE certifications.

Yes, including optimizing settings and suggesting upgrades if needed.

For most systems, an annual HVAC system service is more than enough. Some homeowners prefer a twice-a-year visit to ensure the system is ready for the upcoming summer and winter seasons. If you need to call an HVAC pro more often than this, it may be time to check if your system is getting old enough for a replacement.

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