Boilers for hydronic heating in Denver

Boilers for Every Hydronic System



Plumbing room with two gray water heaters, copper pipes, and a large black mechanical unit on a concrete floor.

A boiler is the core of every hydronic system. Advanced Hydronics designs and installs boiler plants that fit the building, the climate, and the comfort goals of each client. From efficient modern homes in Denver and Boulder to classic properties with cast-iron radiators, we match each project with the right equipment for quiet, reliable heat.Compare models here, then learn about our systems to see how each boiler supports radiant floors, panel radiators, and hot water.

High-Efficiency Condensing Boilers

Smart comfort with lower fuel use


Modern condensing boilers modulate output and extract more heat from combustion, lowering energy use and emissions. With outdoor reset and smart controls, they maintain steady comfort through temperature swings common along the Front Range. Ideal for radiant floors and mixed hydronic systems, they deliver top performance with minimal sound and footprint.

Cast-Iron Boilers

Proven durability for classic systems


Cast-iron boilers remain a reliable choice for traditional radiator systems and homes with steady heat loads. Their high thermal mass offers stable operation and long service life, making them a practical option for upgrades where longevity and simplicity matter most.

Electric Boilers

Clean, quiet heat for all-electric homes


Electric boilers provide silent operation and zero on-site emissions; an efficient fit for smaller systems, accessory buildings, homes pursuing all-electric design goals, or properties with limited access to fuel. They integrate seamlessly with hydronic distribution and pair well with heat pumps or renewable energy systems.

Copper Fin-Tube Boilers

Fast response for specialized applications


Copper fin-tube units deliver strong output in a compact footprint. We apply them where water quality, venting, or legacy piping make this style the right fit.

Choosing the Right Boiler


Selecting the right boiler starts with understanding your home’s layout, heat emitters, and domestic hot water needs. Advanced Hydronics evaluates each project individually, balancing efficiency, durability, and service access for long-term performance. Whether it’s a high-efficiency condensing model for radiant floors or a cast-iron unit for classic radiators, we match every installation to the space, the load, and the lifestyle it supports.

Choosing and Caring for Your Boiler

  • What’s the difference between a condensing and non-condensing boiler?

    Condensing boilers capture additional heat from exhaust gases, allowing them to operate efficiently at lower water temperatures. Non-condensing boilers, such as cast-iron models, are simpler and durable but run at higher temperatures with slightly lower efficiency.

  • How long does a boiler typically last?

    Service life depends on design, installation, and water quality. High-efficiency condensing boilers generally last up to 20 years, while cast-iron units often operate up to 40 years with proper maintenance and annual service.

  • Can my existing boiler be upgraded without replacing the whole system?

    Often, yes. Many hydronic systems can be retrofitted with a new boiler while keeping existing piping and heat emitters. We evaluate the design, controls, and venting to ensure the upgrade aligns with current code and delivers full performance.

  • Do high-efficiency boilers need more maintenance?

    Condensing boilers require regular service to stay efficient, including annual cleaning of heat exchangers and verification of condensate and venting systems. Routine maintenance protects performance and helps prevent premature wear.

  • Which boiler type is right for my home?

    That depends on the heat emitters, available fuel, and performance goals. Condensing boilers pair best with radiant floors and low-temperature systems, while cast-iron models remain ideal for classic baseboard systems. We match each home with the most appropriate technology and control strategy.

  • What are signs my boiler needs attention?

    Uneven heat, loud operation, leaks, or error codes are all indicators. Rising energy use or frequent resets also signal that service or adjustment is needed. Scheduling a diagnostic visit early can prevent costly downtime in winter.