A boiler heating system heats waterA boiler heating system simply heats water that flows through a series of pipes in a home or business. These pipes either run in a radiator in each room, a central air handler, baseboards or radiators. New condensing boiler systems are over 96% efficient. They also replace two appliances by providing the warm water for heat and your domestic hot water supply. Combination boilers take full advantage of tankless technology by providing high efficiency comfort in a small package, most are only slightly larger than a carry-on suitcase.

How It Works

Condensing tankless water heaters and boilers feature two heat exchangers, a primary and a secondary. The job of the secondary heat exchanger is to take the heat that is typically exhausted through the vent and use it to preheat the water that is coming into the unit.

This process increases the efficiency of the unit by 12 to 16%. It also creates small amounts of condensation that must be pumped to the exterior of your structure or piped into a drain. By using the secondary heat exchanger the flue temperature stays below 120 degrees. The relatively cool flue temperature means that these units are typically vented with inexpensive PVC pipe.

the unit can be vented with PVCAfter the water is preheated in the secondary heat exchanger, it passes through the primary heat exchanger and is heated to the set temperature. It then flows from the combi boiler to your faucets, baseboard pipes, air handler or floor heating system.

The unit is controlled by a series of controls and valves and is designed to only send hot water to the area of your home that needs warming. Combi Boilers provide a comfort level and energy efficiency level that is unmatched!

Typical Uses

These units can be used for hydronic/radiant floor heating with tubing that runs under your floor or that is embedded in concrete. Hot water provided from a Combi Boiler can be piped to a hydronic air handler or “water furnace” and use the forced air fan and duct work to warm the home. They can also be used in a hot water baseboard heating system.

Combi Boilers are the perfect option when it comes time to replace an old, inefficient oil burning boiler. Not only will the increased efficiency of the boiler save you money, you can dump your electric water heater and enjoy an endless supply of hot water! Our customers have seen a significant drop in power bills (at least $50 per month) when utilizing tankless technology. G&B Energy proudly sells and installs Rinnai and Navien ultra efficient Combi Boilers.

Combi Boilers Brochures:

Rinnai Boilers

Navien Boilers

We recommend the installation of a Carbon Monoxide detector in the homes of ALL of our customers!