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Best boiler installation pros near Longmont, CO

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

Avatar for Precision Plumbing Heating Cooling Electric
Precision Plumbing Heating Cooling Electric
4.5(
198
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved

In business since 1982

Warranties offered

Credit card accepted

"Precision installed my water heater two years ago. When I had my furnace serviced, the technician checked the pressure on the water heater and it was very high, a component had failed. A plumber from Precision came out and replaced the defective part since it was under warranty. He suspected that a water pressure regulator may have to be installed but when he checked the water pressure coming into the house, it was in the acceptable range. He could have just as easily told me I needed this and it would have cost me $600 but Jacob was an honest man. I am so impressed with his integrity. I will use them again in the future for sure. The replacement of the defective part didn't cost me anything. Thank you Precision for being an honest company."
Response time6 days
16 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Aether Mechanical, LLC
Aether Mechanical, LLC
4.5(
106
)
Gas Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Highest recommendation for the Aether Mechanical team for our recent boiler replacement--every detail of the experience was managed professionally and expeditiously, and the entire project was completed in one day. Take a bow Nicholas, Ivan, John, and team--virtuoso performance and a first-rate result! Two days after Christmas we woke up to a cold house and a boiler that would not fire up. Aether Mechanical responded at once by phone and Nicholas arrived onsite from Boulder to our house in SE Denver within two hours. Initial assessment indicated a burnt-out igniter. Nicholas replaced that and discovered during fire-up testing that carbon monoxide levels were *way* above acceptable limits. After repeated tests, the unavoidable conclusion was a cracked firebox, necessitating replacement. We reviewed estimates at three price points, selected one, and Nicholas mobilized his team. During a holiday week, working around challenges with HVAC supply house business hours, the team completed the installation entirely the following day. In spite of an expensive but necessary replacement, this has been singularly the best contractor experience I have had in 25 years living in a mid-century modern house that is starting to require more frequent repairs."
Mini-Split system
AC/Furnace Install
Cast Iron Boiler
AC Install
Boiler

+1

Response time7 hrs
Response rate89%
85 neighbors recently requested a quote
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

"Outstanding family-run company. Efficient, professional, reliable, and friendly service. Jim personally handled my plumbing "emergency" on very short notice, and he absolutely exceeded all expectations. I had a saddle valve - connected to the water heater - fail, and he not only fixed the leak but installed a stronger valve/line to mitigate the risk of another premature failure. Jim Needham Plumbing is a top-tier company that goes above and beyond, and stands behind their work; this is the type of small business I am happy to support and recommend to friends and family."
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

"We had an excellent experience with Controlling Systems from the first phone call to our install. All the professionals were prompt, friendly and hard working. We had a lot of questions throughout the process and they answered every one. The prices seem right in line with the industry and we were overall very happy with their work."
Additional Photos
Additional Photos
Additional Photos
15 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

"10/10 experience. installed a load-bearing beam and currently demoing our bathroom for to start our bathroom remodeling, and the results were amazing. Very professional, reliable, and detail-oriented. Everything was completed on time and the quality of work was excellent. Highly recommend! He also walked me thru and design my kitchen lay out"
Owen Allen
House remodel
House remodel
House remodel
House remodel

+30

Recommended by82%of homeowners
Avatar for Tipping Hat  Plumbing Heating & Electric, LLC
Tipping Hat Plumbing Heating & Electric, LLC
4.0(
436
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Longmont, CO and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Credit card accepted

"Like any plumbing job today, the cost of installation is rough two or three times the cost of the item. This is a product of shortages of skilled help and there is little to be done. If you want it done particularly with any speed you will pay these prices. The cost of a water heater installed is three times what it was only ten years ago."
Smart Tstat
High Efficiency Furnace
Humidifier
Standard Furnace
Furnace, Water heater and Air purifier

+16

Response time10 hrs
194 neighbors recently requested a quote
Recommended by85%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%
29 neighbors recently requested a quote
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Install Boiler FAQs, answered by experts

Deciding whether or not to replace radiators with a different heating system depends on your personal preferences. Radiators can take longer to heat up than a central heating system, and they take up floor space. However, they can be very efficient at heating, and they keep rooms at a more comfortable humidity level in the winter than forced-air systems.

You can use a boiler and a furnace, although it’s not common to use both for whole-house heating. For example, your furnace may take care of HVAC heating through your vents, while a boiler powers your floor-based radiant heating in the bathrooms. Mixing and matching like this gives homeowners a variety of heating possibilities.

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

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.

While you’ll pay more upfront for a brand-new HVAC unit, you can save money in the long run. Here’s how to save on your new HVAC system:

  • When purchasing a high-efficiency system, your energy bills will be lower in the future.

  • You may be eligible for special offers from your local energy company.

  • Depending on the system, you may be eligible for HVAC rebates and tax credits.

  • Choose to replace your air conditioning unit and furnace simultaneously to save on labor and installation costs. 

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.