Hydronic systems are the next most common type of heating system, using a boiler to heat water. The water is then circulated through radiators and baseboards to heat the house before returning to the boiler to be reheated. The use of water as the heat transfer medium is known as hydronics. The water can be heated by any fuel depending on the equipment you choose for your home heating system. The water is in an enclosed system and circulated throughout by means of a motorized pump. Most new systems are fitted with condensing boilers for greater energy efficiency. These boilers are referred to as condensing boilers because they condense the water vapor in the flue gases to capture the latent heat of vaporization of the water produced during combustion.The three main components of such a system are: 1. a boiler to heat the water; 2. heating equipment — generally baseboard heaters, registers or radiators — in most rooms, often installed against an outside wall; and 3. a pump to circulate water from the boiler to the radiators and ensure that it flows back through the pipes.

Advantages of Hydronic Heating (Boilers):

  • system can be easily zoned, allowing for selected temperatures in different areas of the home
  • consistent, even temperature in the home (no sudden bursts of heat as with forced air system)
  • allows for the option of providing domestic hot water on demand from the boiler or the option to incorporate an energy efficient, environmentally friendly indirect-fired water heater
  • They tend to not dry out the interior air as much as forced air systems (typically)
  • They do not introduce any dust, allergens, mold, or (in the case of a faulty heat exchanger) combustion byproducts


Apart from your conventional heating systems that use registers and radiators, you can also choose built-in radiant systems. There are generally two types: hot water pipes in floors, ceilings and walls and electrical cables in floors (which may also be installed in ceilings). In-floor radiant heatinghas become increasingly popular, and can be used independently or in combination with hydronic baseboard heating. While an in-floor radiant system may be slightly more costly to install, they offer plenty of savings and comfort. High-tech flexible tubing or electrical cable installed beneath your floor circulates warm water, warming your floor and radiating heat directly to your body, just like the sun does. In-floor radiant heating puts heat right where you want it with no drafts or cold spots. Radiant in-floor heating requires lower water temperatures than baseboard and radiators to operate, so your energy costs are reduced. Optimized temperature distribution means you can actually lower average room temperatures by up to 3º Celsius and still enjoy greater comfort. In-floor radiant heating can be installed throughout your home, just on one level in combination with hydronic baseboard on other levels, or just in one, special area of your home. (Imagine stepping out of the shower onto warm heated tiles!) There are so many applications; you can even treat yourself by installing it under your paved driveway, to keep it free of ice and snow build-up!

Kerr Calisto

A European Style Boiler from Kerr offers the best value for your dollar. A high efficiency, low water content cast iron boiler with world wide technological improvements. The Kerr Calisto boiler includes the Oil Electronic Aquastat® controller which provides electronic temperature sensing in a UL limit-rated control with a single sensing probe. The electronic Aquastat controls boiler temperature, the circulator and the oil burner and . The standard electronic Aquastat offered with the Kerr Calisto is “Outdoor Temperature Reset” ready which is enabled when connected to the Outdoor Reset Kit. Built-in diagnostics help ensure proper system operation and efficiency.

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Kerr Saturn

The Saturn from Kerr Heating Products combines the latest in oil-burner technology with traditional design to create a dependable boiler built to last. The Saturn is an economical, single source for hot water and home heating. The traditional design vertical tube, dry base, chambered unit provides ease of installation and worry free operation. Available in models from 93,000 to 174,000 Btu/h and operating at up to 86% efficiency. When it comes time to replace or upgrade your older heating system, the Saturn is the ideal choice.

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Kerr Comet

Small in size, big on performance, Kerr’s Comet oil fired hot water boilers are ideal for new home construction , electric conversion, in-floor heating, direct venting and commercial applications, An IS0 9001 company, Kerr manufactures quality heating equipment built to the highest standards to provide years of dependable service. From 71,000 - 270,000 Btu/h and as small as 32 1/2” high, Kerr’s high efficiency Comet 145 and 270 boilers fit your needs. Operating at efficiencies up to 88%, the Comet boiler helps you save money. The “quick heat” design provides greater comfort. A built-in hot water coil ensures a long lasting supply of domestic hot water. Ideal for direct venting, the Kerr Comet is the contractor’s choice for dependability and reliability. With a proven history of performance and featuring wet base design, convenient front clean out, field left/right breeching and compact size, it’s no wonder the Comet is known as “the best little steel boiler in the business.”

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