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Best boiler installation pros near Longmont, CO

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    Average homeowner rating
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    Verified boiler installation services reviews

Top-Rated Boiler installation pros in Longmont - Updated Nov 2026

Avatar for Heart Heating, Cooling, Plumbing & Electric
Heart Heating, Cooling, Plumbing & Electric
4.7(
92
)
Gas Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"I contacted the home office for an appointment on Monday this week, and they got me on the schedule for the upcoming Friday morning. The email and text response about the appointment that i set was excellent. The technician notified me he was on the way and promptly arrived at 8am. His name is Greg, and he is very knowledgeable about boilers and his craft. He was able to correctly identify our immediate trouble and let me know he could have the unit back up and running the same day. He also let me know about other details that should be upgraded. So, we are very happy that Greg came to our home and checked out the boiler. We will be very happy to have them back in the future."
Additional Photos
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Additional Photos

+24

10 neighbors recently requested a quote
Recommended by81%of homeowners
Avatar for Jim Needham Heating Cooling Plumbing & Drain
Jim Needham Heating Cooling Plumbing & Drain
4.5(
72
)
Gas Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Jim did a great job installing my water heater. He also repaired a washer leak and water connectors. I would highly recommend him. He was fair and reasonable, high ethical standards. I certainly will call him again if I have a problem. Thank you Jim......"
After
Furnace
Outdoor a/c (condensing) unit
Indoor furnace
Outdoor a/c (condensing) unit

+1

Response time2 days
18 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Controlling Systems
Controlling Systems
4.4(
14
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Longmont, CO and surrounding areas

Approved

In business since 1976

Free estimates

Emergency services offered

"Every step, from the estimate with the super friendly Ryan, to the final walk-thru with the always professional Gemini, was absolutely top notch. They installed a new furnace, A/C, and tankless water heater and we are very happy with the work and final outcome. The whole crew was wonderful!"
Additional Photos
Additional Photos
Additional Photos
8 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for Allen Construction
Allen Construction
4.9(
24
)
Electric Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved

In business since 2005

Free estimates

Credit card accepted

"I've had Owen do multiple projects around our home, from ceiling fans, shelving. Cabinets and many more. So when we moved into a house that needed a lot of work we called Owen. He installed a hanging very large kitchen hood, and made sure it was secured not only with the manufacturer recommendation but above and beyond. He also installed our very large heavy Iron Front Door. I highly recommend Owen you won't be disappointed."
Owen Allen
House remodel
House remodel
House remodel
House remodel

+30

Recommended by82%of homeowners
Avatar for Red Star Plumbing
Red Star Plumbing
4.2(
25
)
Gas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 1993

Free estimates

Emergency services offered

"Called in the morning on a garbage disposal issue. They were able come out the same day, found the root issue which wasn t obvious, were able to install a great replacement product (super quite), were wearing masks, and were very professional. Would definitely use them again."
Pedestal Sink
Master soaker tub
Toilet
Response time6 hrs
Recommended by79%of homeowners
Avatar for SWAN Plumbing, Heating & Air of Loveland
SWAN Plumbing, Heating & Air of Loveland
5.0(
3
)
Gas Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

Our team of master plumbing, heating and air conditioning technicians are dedicated to providing professional quality plumbing and HVAC services to residents and families throughout the Denver metro area. Our teams of highly qualified plumbers and technicians are always equipped with stocked work trucks to get the job done and resolve your issues quickly. We understand the importance of providing timely and high quality service. Being a family-owned and operated business, we are also mindful of the fact that it is taking place within your home, and take the following steps to respect your home while we are on-site \n

AC Repair
HVAC Service
Furnace Service
Ac Repair
Air Conditioning Services

+1

Response time2 days
Response rate100%
26 neighbors recently requested a quote
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Install Boiler FAQs, answered by experts

On average, you’ll need about two gallons of oil per day to heat your house when it’s 50 degrees Fahrenheit outside. Most oil tank capacity is about 275 gallons, and heating your house with two gallons of oil per day will last about four and a half months. This consumption will vary depending on the climate and average temperature in your location. For example, if the winters are longer and colder where you live, you’ll probably need to refill your oil tank at least once to get through the winter.

Radiators are a popular home heating choice in older homes, but they are becoming less common in new-construction homes. According to a 2022 report by Elements Visual Capitalist, only around 1.3% of new single-family homes have radiators and similar heating systems, such as baseboard heating.

While they may not be as popular as they once were, radiators today come with more energy-efficient features that can make them practical for modern homeowners.

Hydronic and standard electric baseboard heaters differ in how they operate, their cost, and their performance. Standard convection heaters use electric coils to heat the air directly, while hydronic heaters warm a contained liquid like water or oil, which then radiates heat into the room.

In terms of cost and efficiency, hydronic heaters usually have a higher upfront price but are more energy-efficient and cheaper to run over time. This is because the heated liquid retains warmth, allowing the heater to continue providing heat for a while after the thermostat turns it off. In contrast, electric heaters provide heat more quickly but are less efficient.

Ultimately, the better choice depends on your priorities. If you need a room to heat up fast and have a lower initial budget, an electric heater might be suitable. If long-term energy savings are more important and you don't mind a slower heat-up time, a hydronic heater is likely the better option.

It can take anywhere from four hours to three days to replace a boiler with a new one. How long your particular boiler installation takes will depend on whether you need a gas line installed and if you’re switching to a new boiler system. 

Replacing a combination boiler or standard boiler with the same system should only take four to six hours. Meanwhile, switching from a conventional boiler system to a combination boiler system could take a few days.

Costs depend on issue severity, parts needed, and labor rates.

The Longmont, CO homeowners’ guide to boiler installation services

From average costs to expert advice, get all the answers you need to get your job done.