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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon222
    Verified heating oil services reviews

Verified Reviews for Heating Oil Service pros in Portsmouth, NH

*The Angi rating for Heating Oil Service companies in Portsmouth, NH 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 Portsmouth, NH 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 December 02, 2025

Find Heating oil pros in Portsmouth

Avatar for Duct Kings

Duct Kings

4.66(
369
)
•Approved Pro

Duct Kings

4.66(
369
)
•Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
1999 years of experience

We are experts in air duct & dryer vent cleaning for homeowners & businesses. We also insulate & repair ductwork, offer video inspection, sanitizing, air leak testing & duct leak sealing using Aeroseal, a patented technology created by the US Department of Energy to decrease energy bills that result from leaky airducts.

"I have been using duct kings to clean my dryer vent for several years. They always arrive on time and thoroughly clean out the dryer vent. I used them again this year and they provided the same great service! It was great to have the same technician who was familiar with my home to provide the service several years in a row."

Homeowner on November 2025

We are experts in air duct & dryer vent cleaning for homeowners & businesses. We also insulate & repair ductwork, offer video inspection, sanitizing, air leak testing & duct leak sealing using Aeroseal, a patented technology created by the US Department of Energy to decrease energy bills that result from leaky airducts.

"I have been using duct kings to clean my dryer vent for several years. They always arrive on time and thoroughly clean out the dryer vent. I used them again this year and they provided the same great service! It was great to have the same technician who was familiar with my home to provide the service several years in a row."

Homeowner on November 2025

Avatar for Chase Heating & Cooling

Chase Heating & Cooling

4.98(
63
)

Chase Heating & Cooling

4.98(
63
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

• 2016 Super Service Award Winner - 2nd Year! • BBB Complaint-FREE! • We are a Locally Owned & Family Operated Heating & A/C Company that has Proudly Served Windham, NH & the Surround Areas for Over 13 Years! • 24/7 Emergency Services • AUTHORIZED CARRIER DEALER • OSHA Certified - Fully Licensed & Insured • We strive for quality and settle for nothing less! • If you are looking for someone to give you a great solution for your Heating & Cooling needs and want things done right the first time then look no further • References Available Upon Request • We look forward to working with you! • Call (603) 234-2238 To Schedule a FREE Estimate or Appointment Today!

"My AC failed the night before a business trip. Eric was willing to take my passcode and go in and fix the very old R22 system the next day for my wife. A week later, the refrigerant was low and system failed. Within 2 days, his Team was in again and replaced the system at a very reasonable price. Very professional, responsive and trustworthy!"

Don C on September 2022

• 2016 Super Service Award Winner - 2nd Year! • BBB Complaint-FREE! • We are a Locally Owned & Family Operated Heating & A/C Company that has Proudly Served Windham, NH & the Surround Areas for Over 13 Years! • 24/7 Emergency Services • AUTHORIZED CARRIER DEALER • OSHA Certified - Fully Licensed & Insured • We strive for quality and settle for nothing less! • If you are looking for someone to give you a great solution for your Heating & Cooling needs and want things done right the first time then look no further • References Available Upon Request • We look forward to working with you! • Call (603) 234-2238 To Schedule a FREE Estimate or Appointment Today!

"My AC failed the night before a business trip. Eric was willing to take my passcode and go in and fix the very old R22 system the next day for my wife. A week later, the refrigerant was low and system failed. Within 2 days, his Team was in again and replaced the system at a very reasonable price. Very professional, responsive and trustworthy!"

Don C on September 2022

Avatar for AppliancePartsPros.com

AppliancePartsPros.com

4.73(
287
)

AppliancePartsPros.com

4.73(
287
)
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers

Since 1999, we've helped millions of do-it-yourselfers save money and fix their broken appliances quickly by providing quality appliance parts and free repair advice. We are only an online appliance parts retailer that offers a 365 day warranty and fast shipping. We also offer technical advice and diagnosis totally free 6 days a week. If you are interested in repairing your own appliance, please call us at 1-877-477-7278 or click live chat on our web site. We will help diagnose the problem and provide you with all the necessary information for the repair free of charge. It's better with the Pros!™ Avoid costly service calls - visit us at http://www.appliancepartspros.com

"Beware of shipping issues with this company. Ordered an ice maker installation kit on 10/10/25. Shipping was due no later than 10/20 according to company and FedEx tracking. FedEx tracking showed the package at their facility for 8 days without moving beginning on 10/15. Called FedEx 3 times. Each time they said they cannot find package and I have to contact shipper. Shipper has to make a claim, they will not mark it as lost. Called Appliance Parts Pros twice. Each time they say FedEx has to mark package lost before they will do anything. They also state they have to wait 14 days from them before doing anything because of their contract with FedEx. I don't care about their contract, I want what was ordered and paid for. Just going in circles with them and FedEX. If they shipped after 14 days it would be 22 days from that point, 32 days from the date of order if they shipped it that day. There was a deadline for installing this part before tenants arrive. They did not care, would not m"

Ron R on October 2025

Since 1999, we've helped millions of do-it-yourselfers save money and fix their broken appliances quickly by providing quality appliance parts and free repair advice. We are only an online appliance parts retailer that offers a 365 day warranty and fast shipping. We also offer technical advice and diagnosis totally free 6 days a week. If you are interested in repairing your own appliance, please call us at 1-877-477-7278 or click live chat on our web site. We will help diagnose the problem and provide you with all the necessary information for the repair free of charge. It's better with the Pros!™ Avoid costly service calls - visit us at http://www.appliancepartspros.com

"Beware of shipping issues with this company. Ordered an ice maker installation kit on 10/10/25. Shipping was due no later than 10/20 according to company and FedEx tracking. FedEx tracking showed the package at their facility for 8 days without moving beginning on 10/15. Called FedEx 3 times. Each time they said they cannot find package and I have to contact shipper. Shipper has to make a claim, they will not mark it as lost. Called Appliance Parts Pros twice. Each time they say FedEx has to mark package lost before they will do anything. They also state they have to wait 14 days from them before doing anything because of their contract with FedEx. I don't care about their contract, I want what was ordered and paid for. Just going in circles with them and FedEX. If they shipped after 14 days it would be 22 days from that point, 32 days from the date of order if they shipped it that day. There was a deadline for installing this part before tenants arrive. They did not care, would not m"

Ron R on October 2025

Avatar for Extra Time Enterprises LLC Plumbing & Heating

Extra Time Enterprises LLC Plumbing & Heating

4.95(
100
)

Extra Time Enterprises LLC Plumbing & Heating

4.95(
100
)
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

We accept all credit cards.

"Fixed two shower problems. One was linking and the other didn’t have enough hot water pressure. Jason was able to get a 29 year old shower stem unit replaced saving me hundreds of dollars on one bathroom. The second bathroom needed a water pressure adjustment again saving me hundreds of dollars."

Wallace B on October 2019

We accept all credit cards.

"Fixed two shower problems. One was linking and the other didn’t have enough hot water pressure. Jason was able to get a 29 year old shower stem unit replaced saving me hundreds of dollars on one bathroom. The second bathroom needed a water pressure adjustment again saving me hundreds of dollars."

Wallace B on October 2019

O-Bees Electric LLC

4.92(
110
)

O-Bees Electric LLC

4.92(
110
)
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

Fast and honest Quality Residential Electrical Service with 38 years of experience at only $75.00/hr. Also provide Commercial Electrical Service.

"Frances is pleasant to talk with and was punctual and responsive. My problem was that he's probably too busy. When I received his invoice, he charged me for the recessed lights that *I* had already purchased and then I had to prove myself by showing him the receipt. He charged me 2x the Home Depot price for Romex (which I had 100 feet of in my garage, ready to go). He put in dimmer switches that didn't match the coloring of my house project (old switches were almond, new switches should have been white) and then indicated he thought I wanted almond color since those were in other places (so were the white!). He should have asked what color I wanted, but didn't and then didn't offer to replace them. This experience left a bad taste in my mouth, I'd not hire him again."

Ann B on February 2018

Fast and honest Quality Residential Electrical Service with 38 years of experience at only $75.00/hr. Also provide Commercial Electrical Service.

"Frances is pleasant to talk with and was punctual and responsive. My problem was that he's probably too busy. When I received his invoice, he charged me for the recessed lights that *I* had already purchased and then I had to prove myself by showing him the receipt. He charged me 2x the Home Depot price for Romex (which I had 100 feet of in my garage, ready to go). He put in dimmer switches that didn't match the coloring of my house project (old switches were almond, new switches should have been white) and then indicated he thought I wanted almond color since those were in other places (so were the white!). He should have asked what color I wanted, but didn't and then didn't offer to replace them. This experience left a bad taste in my mouth, I'd not hire him again."

Ann B on February 2018

Avatar for Main Stream Mechanical

Main Stream Mechanical

4.82(
67
)

Main Stream Mechanical

4.82(
67
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Main Stream Mechanical provides full spectrum plumbing, heating and air conditioning services. We also install and service whole-house generators and water filtration/purification systems. We are dedicated to providing reliable and cost effective solutions that best fit our customer's needs and expectations. As a National Grid VPI contractor, we specialize in converting oil customers to natural gas. Our techncians are expert, professional and responsive. They are licensed and hold industry certifications. We service and install natural gas, propane gas and oil equipment.

"Huge shout out to the crew at Main Stream Mechanical. Eric came out, reviewed my current system, and gave me his recommendation for replacing my furnace and hot water heater with a new, energy efficient furnace/hot water heater. Brenda, as always, was a pleasure to deal with. Answered all my emails and calls promptly and gave me all the information I needed in a timely manner. She even went out of her way to register my new furnace and provide me with all the information I needed to apply for my rebate! Nick and Marcus did a great job installing my new furnace/hot water heater. Both were very friendly and professional. Nick answered all my questions, gave me a “tutorial” on the emergency shut off procedure for my new furnace, and did a fantastic job re-plumbing all the lines needed for the install. I highly recommend Main Stream Mechanical for all your HVAC needs."

NormaJean F on July 2024

Main Stream Mechanical provides full spectrum plumbing, heating and air conditioning services. We also install and service whole-house generators and water filtration/purification systems. We are dedicated to providing reliable and cost effective solutions that best fit our customer's needs and expectations. As a National Grid VPI contractor, we specialize in converting oil customers to natural gas. Our techncians are expert, professional and responsive. They are licensed and hold industry certifications. We service and install natural gas, propane gas and oil equipment.

"Huge shout out to the crew at Main Stream Mechanical. Eric came out, reviewed my current system, and gave me his recommendation for replacing my furnace and hot water heater with a new, energy efficient furnace/hot water heater. Brenda, as always, was a pleasure to deal with. Answered all my emails and calls promptly and gave me all the information I needed in a timely manner. She even went out of her way to register my new furnace and provide me with all the information I needed to apply for my rebate! Nick and Marcus did a great job installing my new furnace/hot water heater. Both were very friendly and professional. Nick answered all my questions, gave me a “tutorial” on the emergency shut off procedure for my new furnace, and did a fantastic job re-plumbing all the lines needed for the install. I highly recommend Main Stream Mechanical for all your HVAC needs."

NormaJean F on July 2024

Avatar for CAL'S AIR CONDITIONING AND HEATING

CAL'S AIR CONDITIONING AND HEATING

4.90(
67
)

CAL'S AIR CONDITIONING AND HEATING

4.90(
67
)
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

Cal's Air Conditioning and Heating. Sole Proprietership, in business since 1994, locally owned and operated, owner Ernest Calderone. Billing-paid upon completion of service or installation.

"Very pleased with the Mitsubishi ductless a/c system Cal's installed. Prompt and professional. Highly recommended."

kim k on August 2018

Cal's Air Conditioning and Heating. Sole Proprietership, in business since 1994, locally owned and operated, owner Ernest Calderone. Billing-paid upon completion of service or installation.

"Very pleased with the Mitsubishi ductless a/c system Cal's installed. Prompt and professional. Highly recommended."

kim k on August 2018

Avatar for Dryer Vent Wizard of Middlesex-Essex

Dryer Vent Wizard of Middlesex-Essex

4.80(
197
)

Dryer Vent Wizard of Middlesex-Essex

4.80(
197
)
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

Award winning. We pride ourselves on our quality and professionalism. Our goal is 100% customer satisfaction. We show up on time and clean up our mess! Please consider Dryer Vent Wizard for all your dryer venting needs. We are certain that your experience with our company will be a most pleasant one. Additional phone numbers - (866) 498-7233 & (800) 993-8289. Additional DBA - Widget & Bread. Additional website - www.nhdryervent.com.

"It all went smoothly, i.e., the scheduling, actual service, and the payment. The technician appeared on time. He was very amiable, and professional. The work was done promptly. I have been using their service for several years now and I am very satisfied."

Iftekhar R on April 2025

Award winning. We pride ourselves on our quality and professionalism. Our goal is 100% customer satisfaction. We show up on time and clean up our mess! Please consider Dryer Vent Wizard for all your dryer venting needs. We are certain that your experience with our company will be a most pleasant one. Additional phone numbers - (866) 498-7233 & (800) 993-8289. Additional DBA - Widget & Bread. Additional website - www.nhdryervent.com.

"It all went smoothly, i.e., the scheduling, actual service, and the payment. The technician appeared on time. He was very amiable, and professional. The work was done promptly. I have been using their service for several years now and I am very satisfied."

Iftekhar R on April 2025

Avatar for BADGER PLUMBING HEATING & MECHANICAL INC.

BADGER PLUMBING HEATING & MECHANICAL INC.

4.83(
48
)

BADGER PLUMBING HEATING & MECHANICAL INC.

4.83(
48
)
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

Badger Plumbing, Heating & Mechanical is a family owned and operated plumbing, heating and gas company serving our commercial and residential customers for close to 40 years! We service the Lakes Region as well as the NH Seacoast and everywhere in between. We are fully licensed and insured. We have an unwavering commitment to use quality, name-brand products with professionally-backed warranties. We have vast knowledge in all areas of plumbing and heating. Our team brings many years of on hands experience and is ready to tackle anything thrown their way. Our team is equipped with the latest training and tools to make sure your project runs smoothly. Our warranty-backed products, knowledgeable staff, and seamless installation process are the perfect combination. We will always be upfront and honest with our customers. Never charging anyone for repairs or replacements that they do not need. We will keep you informed every step of the way letting you know what needs to be done and what can wait. We continually strive to exceed expectations by ensuring that each customer receives the very best service. We deliver top-quality workmanship and incredible customer service. Whether you have a serious leak or need routine maintenance for your plumbing or heating systems, there is no job too big or too small for us.

"Drain Pipe installation"

Julie R on October 2020

Badger Plumbing, Heating & Mechanical is a family owned and operated plumbing, heating and gas company serving our commercial and residential customers for close to 40 years! We service the Lakes Region as well as the NH Seacoast and everywhere in between. We are fully licensed and insured. We have an unwavering commitment to use quality, name-brand products with professionally-backed warranties. We have vast knowledge in all areas of plumbing and heating. Our team brings many years of on hands experience and is ready to tackle anything thrown their way. Our team is equipped with the latest training and tools to make sure your project runs smoothly. Our warranty-backed products, knowledgeable staff, and seamless installation process are the perfect combination. We will always be upfront and honest with our customers. Never charging anyone for repairs or replacements that they do not need. We will keep you informed every step of the way letting you know what needs to be done and what can wait. We continually strive to exceed expectations by ensuring that each customer receives the very best service. We deliver top-quality workmanship and incredible customer service. Whether you have a serious leak or need routine maintenance for your plumbing or heating systems, there is no job too big or too small for us.

"Drain Pipe installation"

Julie R on October 2020

Avatar for JMS Plumbing And Heating LLC

JMS Plumbing And Heating LLC

4.86(
79
)

JMS Plumbing And Heating LLC

4.86(
79
)
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

With jms plumbing and heating, you have over 20+ years of plumbing and heating experience that works to your advantage – quick, reliable and efficient service. This experience includes treating you and your home with respect, which is what we pride ourselves on. Many of our customers look to us as their preferred residential plumbing service provider. We enjoy our work and it shows! We look forward to welcoming you as a customer and being your preferred plumber in the future. licenses nh master plumber: 4923 ma journeyman plumber: 30110 nh gas fitter: gfe0804753.

"Great !!! He shows up when he says. Returns calls. Knows what he is doing. Polite & clean. Does great work at a fair cost."

Carl M on January 2021

With jms plumbing and heating, you have over 20+ years of plumbing and heating experience that works to your advantage – quick, reliable and efficient service. This experience includes treating you and your home with respect, which is what we pride ourselves on. Many of our customers look to us as their preferred residential plumbing service provider. We enjoy our work and it shows! We look forward to welcoming you as a customer and being your preferred plumber in the future. licenses nh master plumber: 4923 ma journeyman plumber: 30110 nh gas fitter: gfe0804753.

"Great !!! He shows up when he says. Returns calls. Knows what he is doing. Polite & clean. Does great work at a fair cost."

Carl M on January 2021

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Heating Oil questions, answered by experts

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

The most obvious downside is the high upfront cost of buying and installing one of these systems. Additionally, sometimes the system can take a longer time to heat than alternatives like a boiler. Also, if something goes wrong with the geothermal pump, repairs are often significantly more expensive than repairing traditional, above-ground heat pumps.

Service costs range from $200 to $1,500, depending on maintenance needs, system age, and labor.

You can expect a geothermal system to last for years. According to the Department of Energy, the underground infrastructure for the heat pumps lasts about 25 to 50 years, which includes the pipes buried in the soil. The actual heat pump itself has a life span of around 25 years.

If a geothermal heat pump is installed correctly, then you shouldn’t have to worry about having a backup heat source such as a furnace or oil boiler. However, there are geothermal systems installed that include a backup in case the heat pump fails due to extreme cold. This is simply a backup heat pump you’ll likely never need and not an alternative heat source.

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