We're a family-owned company based right here in Longmont. We know these winters. We know the older homes near Old Town with aging hydronic systems, and we know the custom builds out in Prospect New Town running radiant floor heat. Whether your boiler needs a quick repair, a full replacement, or just an annual tune-up, our licensed and insured technicians are ready to help.
A boiler isn't like a furnace. It heats water and moves it through pipes to warm your home quietly and evenly. When it works right, you barely notice it. When it doesn't, you feel it fast.
Boiler Services We Offer in Longmont
From a boiler that won't fire up to a brand-new high-efficiency system, we handle it all. Here's a closer look at our core services.
Boiler Installation and Replacement
Installing a boiler is more than swapping out a unit. Get it wrong, and you'll deal with high bills, uneven heat, or cold rooms for years.
With every boiler installation in Longmont, we start by calculating your home's heating load. This tells us the right BTU output so your boiler isn't too big or too small. An oversized boiler short-cycles and wears out fast. An undersized one struggles on the coldest nights.
We install:
- High-efficiency natural gas boilers that squeeze more heat from less fuel
- Hot water boilers for hydronic and radiant systems
- Replacement units matched to your existing piping and zones
When we do a high-efficiency boiler installation in Longmont, CO, we handle the venting, combustion requirements, and code-compliant setup. Then we test and commission the system so it runs safe and clean from day one.
Not sure whether to repair or replace? Consider a hot water boiler replacement if you're seeing:
- Frequent breakdowns
- Rising heating costs season after season
- Uneven heating between rooms
- Rust, corrosion, or water leaking around the unit
- Trouble finding replacement parts for an older model
A boiler that's 20 years or older and giving you regular trouble is usually a strong candidate for replacement. Upgrading to a high-efficiency system often pays you back in comfort and lower bills.

Boiler Repair and Emergency Service
Heat problems never wait for business hours. That's why we offer boiler repair in Longmont, CO with same-day appointments whenever possible and 24/7 emergency service for no-heat situations.
Here are the issues we see most:
- Boiler not producing heat in Longmont homes, often from ignition or pilot problems
- Low system pressure
- Boiler making noise, banging, gurgling, or whistling
- Circulator pump failure that stops hot water from moving
- Expansion tank problems causing pressure swings
- Zone valve failure leaving one part of the house cold
- Water leaking from the unit or pipes
- Thermostat malfunctions
- Air trapped in the lines
- Combustion or venting issues
Our techs use modern diagnostic tools to find the real cause, not just the symptom. Then we give you honest options and explain whether a repair or a replacement makes more sense for your budget and your home.
Boiler Maintenance and Tune-Ups
Most winter breakdowns are preventable. Annual boiler maintenance keeps your system running efficiently and catches small problems before they become expensive ones.
During a tune-up we:
- Check system pressure and adjust as needed
- Test safety controls
- Inspect and clean the burners
- Run combustion testing for safe, clean operation
- Clean the heat exchanger
- Inspect the expansion tank
- Test the circulator pump
- Check the zone valves
- Bleed trapped air from the system
- Look for leaks and corrosion
- Verify the thermostat works
- Flush the system when needed
Regular maintenance improves efficiency, extends equipment life, reduces mid-winter surprises, and helps us spot safety concerns like a cracked heat exchanger early.

Boiler Inspections and Safety Checks
Boilers burn natural gas and hold pressurized water, so safety matters. Our inspections cover combustion, venting, and gas connections to make sure everything's operating within safe limits.
We test for proper combustion, check the flue and venting for blockages or leaks, and confirm safety controls shut the system down when they should. If you've bought an older home near Roosevelt Park or Downtown Longmont with an unknown boiler history, an inspection is a smart first move.
Why Choose EP Plumbing, Heating & Air for Boiler Services in Longmont
- We're local and we know Longmont. Our team understands Front Range weather, sudden temperature drops, and the long heating seasons that put real stress on your system. We've worked on everything from aging boilers in Old Town to modern radiant setups in newer builds.
- We're licensed and insured. Every EP Plumbing, Heating & Air technician is licensed and insured in Colorado, background checked, and trained to respect your home. We leave every job site clean.
- We give honest advice. We won't push a replacement when a repair will do. And we won't nurse along a dying boiler when a new one will save you money. You get straight answers and upfront pricing with free estimates before work begins.
- We know hydronic heating inside and out. From circulator pumps and expansion tanks to zone valves and BTU sizing, we understand how the whole system works together, hydronic baseboard, radiant floor heat, and hot water boilers alike.
- We respond fast. With 24/7 emergency service and same-day appointments when possible, we're here when the heat goes out. When you call, you talk to a real professional who takes your problem seriously.