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TRUSTED BY DELTA, MI HOMEOWNERS

  • Average homeowner rating star icon4.1
    Average homeowner rating
  • Verified reviews icon73
    Verified heating oil services reviews

Find Heating oil pros in Delta

Avatar for SULLIVAN Heating Cooling Plumbing

SULLIVAN Heating Cooling Plumbing

4101 40th Street SE, Suite 1
5.00(
3
)
Approved Pro

SULLIVAN Heating Cooling Plumbing

4101 40th Street SE, Suite 1
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
221 local quotes requested

SULLIVAN Heating Cooling Plumbing is West Michigan's most trusted provider for residential customers. We specialize in the installation, repair, maintenance, and emergency services of HVAC and plumbing systems, ensuring year-round comfort and energy efficiency. With a team of certified technicians, and a commitment to quality service, we deliver reliable solutions tailored to each client’s needs. Whether it’s keeping your home warm in those harsh Michigan winters or cool in the dog days of summer, we’re here to help. So remember, When Your Comfort's in Trouble, Call SULLY on the Double!

"Great every professional"

Ed P on August 2025

SULLIVAN Heating Cooling Plumbing is West Michigan's most trusted provider for residential customers. We specialize in the installation, repair, maintenance, and emergency services of HVAC and plumbing systems, ensuring year-round comfort and energy efficiency. With a team of certified technicians, and a commitment to quality service, we deliver reliable solutions tailored to each client’s needs. Whether it’s keeping your home warm in those harsh Michigan winters or cool in the dog days of summer, we’re here to help. So remember, When Your Comfort's in Trouble, Call SULLY on the Double!

"Great every professional"

Ed P on August 2025


Avatar for Gladstone Heating & Cooling

Gladstone Heating & Cooling

8007 North St
5.00(
3
)
Approved Pro

Gladstone Heating & Cooling

8007 North St
5.00(
3
)
Approved Pro
Customers say: Quick response
21 years of experience
Free onsite estimate

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality of our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"Gladstone came on a Sunday to stop a leak from my hot water heating system and then to make sure I had heat on a really cold night. That is far beyond what other hvac providers helped in my situation. Excellent service at a good price!"

Lorna G on December 2024

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality of our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"Gladstone came on a Sunday to stop a leak from my hot water heating system and then to make sure I had heat on a really cold night. That is far beyond what other hvac providers helped in my situation. Excellent service at a good price!"

Lorna G on December 2024


Michigan Heating And Cooling Systems

PO BOX 206
New on AngiNew on Angi
Approved Pro

Michigan Heating And Cooling Systems

PO BOX 206
New on AngiNew on Angi
Approved Pro
12 years of experience
Free onsite estimate

Michigan Heating And Cooling Systems, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

Michigan Heating And Cooling Systems, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.


All Star Mechanical

300 North Jenison
5.00(
19
)
Approved Pro

All Star Mechanical

300 North Jenison
5.00(
19
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

All Star Mechanical, is a locally owned and operated, HVAC business. We have many years of experience behind us, thus we are confident that we can provide you with the best in HVAC service. We always respond quickly to your requests, always price reasonably, and the work performed is of the highest caliber. We use the best in materials as well. Thank you for selecting us and we welcome your questions.

"Our relationship with All Star Mechanical began with Chris coming out to diagnose my AC problem. He tested the system and diagnosed it as low on refrigerant likely do to a leak. We asked to get a quote on replacing the AC and the entire HVAC system. The furnace was a 25 year old Trane. The air filter was 1in thick and struggled to blow through a non-MERV filter, and I wanted cleaner air for the health of my family, especially since wildfires aren't going away anytime soon. We also wanted a whole house humidifier to assist the Vornado units we run 24/7 in the winter. Larry presented us with a variety of options for upgrading my HVAC system, not trying to sell me a system too large and expensive for our needs or climate, then explaining how everything works and how it works together to make our home efficient, safe, clean, and comfortable. The installation team was fantastic. They were scheduled for a 2 day installation and over performed installing the entire system in one day. Matthew and the 2 Nicks were great! Within 2 hours of installing the General Aire MAC high efficiency air cleaner we noticed the air felt and smelled cleaner, inspite of the poor air advisory warning for that day. Finally Chris buttoned the system up completly by running updated thermostat wiring and relocated my thermostat so the new system is compatible with my ADT Z-Wave ADC -T2000 monitored thermostat (my request)! Throughout the entire job, Larry stayed in touch, either by email, phone, or text to make sure everything met or exceeded our expectations. They are definitely Allstars!"

Kristi B on August 2023

All Star Mechanical, is a locally owned and operated, HVAC business. We have many years of experience behind us, thus we are confident that we can provide you with the best in HVAC service. We always respond quickly to your requests, always price reasonably, and the work performed is of the highest caliber. We use the best in materials as well. Thank you for selecting us and we welcome your questions.

"Our relationship with All Star Mechanical began with Chris coming out to diagnose my AC problem. He tested the system and diagnosed it as low on refrigerant likely do to a leak. We asked to get a quote on replacing the AC and the entire HVAC system. The furnace was a 25 year old Trane. The air filter was 1in thick and struggled to blow through a non-MERV filter, and I wanted cleaner air for the health of my family, especially since wildfires aren't going away anytime soon. We also wanted a whole house humidifier to assist the Vornado units we run 24/7 in the winter. Larry presented us with a variety of options for upgrading my HVAC system, not trying to sell me a system too large and expensive for our needs or climate, then explaining how everything works and how it works together to make our home efficient, safe, clean, and comfortable. The installation team was fantastic. They were scheduled for a 2 day installation and over performed installing the entire system in one day. Matthew and the 2 Nicks were great! Within 2 hours of installing the General Aire MAC high efficiency air cleaner we noticed the air felt and smelled cleaner, inspite of the poor air advisory warning for that day. Finally Chris buttoned the system up completly by running updated thermostat wiring and relocated my thermostat so the new system is compatible with my ADT Z-Wave ADC -T2000 monitored thermostat (my request)! Throughout the entire job, Larry stayed in touch, either by email, phone, or text to make sure everything met or exceeded our expectations. They are definitely Allstars!"

Kristi B on August 2023




Aire Serv of Southern Michigan

200 5th St
4.92(
13
)

Aire Serv of Southern Michigan

200 5th St
4.92(
13
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Aire Serv of Southern Michigan was incorporated April 1, 1990, by its president, Michael Kyser. Over the years Aire Serv of Southern Michigan has grown to become one of the most highly recommended and qualified mechanical contractors in southeast Michigan. We take pride in the ability to provide services through an experienced and qualified staff. Aire Serv of Southern Michigan's range of heating and air conditioning service and expertise includes geothermal, residential and commercial renovation along with new construction projects, large and small. Along with our quality products and services, Aire Serv of Southern Michigan exceeds all others by giving customers knowledgeable advice regarding the products we offer and helps them use those products to their maximum benefit. Additional phones - (517) 764-1500, (517) 263-3040 & (800) 913-9333. Formerly known as Comfort 1 Heating & Air Conditioning.

Aire Serv of Southern Michigan was incorporated April 1, 1990, by its president, Michael Kyser. Over the years Aire Serv of Southern Michigan has grown to become one of the most highly recommended and qualified mechanical contractors in southeast Michigan. We take pride in the ability to provide services through an experienced and qualified staff. Aire Serv of Southern Michigan's range of heating and air conditioning service and expertise includes geothermal, residential and commercial renovation along with new construction projects, large and small. Along with our quality products and services, Aire Serv of Southern Michigan exceeds all others by giving customers knowledgeable advice regarding the products we offer and helps them use those products to their maximum benefit. Additional phones - (517) 764-1500, (517) 263-3040 & (800) 913-9333. Formerly known as Comfort 1 Heating & Air Conditioning.


"More than pleased with the work of installing a new furnace and ac unit done by Norm and Brock."

Sam C on October 2025

Additional phone numbers - (810) 664-4328, (810) 629-4328. Additional email - [email protected]. Additional Contact - Richard Holland. Cost is determined by the job.

"More than pleased with the work of installing a new furnace and ac unit done by Norm and Brock."

Sam C on October 2025

Heating Oil questions, answered by experts

DIY maintenance like filter cleaning is possible, but professional servicing ensures proper pressure, refrigerant levels, and loop performance.

Regular inspections, loop flushing, and checking heat exchangers help extend system lifespan.

Leaks, poor airflow, reduced efficiency, and loop blockages are common problems requiring service.

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

You need to service an HVAC system about twice per year, with a service including an inspection and basic maintenance. It’s best to schedule maintenance in the spring (after the furnace has been running and before the AC kicks on) and in the fall (after the AC worked hard all summer and before winter’s first chill arrives). 

Regular HVAC services will keep the system working as efficiently as possible, saving you money on utilities and larger repairs. HVAC maintenance costs around $250 per visit, while bigger repairs from forgotten upkeep could cost thousands.

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