Pros and cons of common heating systems
By Steve Graham, Networx
When choosing a new heating system, consider the cost and energy efficiency of the system, as well as the price and availability of energy sources like natural gas, electricity and wood pellets. Here are the pros and cons of some common options.
Air Ducts and Vents
Furnaces heat air and blow it through ducts. Forced-air systems are relatively inexpensive to install, repair and replace, and they heat quickly and evenly. But many are not energy-efficient. Some users also complain that moving air is noisy and blows allergens around the house.
Boilers generate steam heat or distribute hot water for heating. Steam is a relatively old and inefficient heating technology. Today, hot-water radiators -- both in baseboards and vertical units -- are more efficient and popular. They are quiet and energy-efficient, particularly when used with separate temperature controls for different areas of the home. However, hot-water radiators slowly and unevenly distribute heat from the edges of the room. They also pose challenges for furniture placement because baseboard vents should not be blocked.
Radiant-heat flooring is perhaps the most efficient and comfortable way to use the heat from a boiler. Hot water flows through pipes either installed directly into the floor or below the flooring. Instead of using vents to blow heat into the room, the floors gain heat which rises and warms the people and objects in the room. Radiant-heat flooring is versatile, and can easily be used with solar hot-water systems and geothermal heating systems, among other options. However, radiant-heat flooring is expensive to install and repair, and it may not be applicable in all homes, depending on the foundation and flooring. Air-heated and electric radiant floors are also available, but both are cost-prohibitive for most home applications.
Wood-burning stoves are old devices getting a green upgrade. A new generation of stoves can heat a room or even a small home by efficiently burning biomass such as compacted sawdust or agricultural waste. Specially formulated wood pellets burn with minimal waste or pollution, and they can even be used in boilers or furnaces to update an existing heating system. The pellets must be delivered and fed into the stove or furnace, so these systems require more effort than most heating systems. Malfunctioning wood stoves can emit dangerous air pollutants.
Electric resistance heating may seem energy-efficient. Electric baseboards and other resistance heaters can convert 100 percent of the electric energy to heat energy. However, the high price of electricity makes it a cost-prohibitive heating option for most homeowners.
In moderate climates, electricity can provide energy-efficient and inexpensive heating and cooling. Electric heat pumps essentially draw heat from the outside air into your cold home during the winter. The process is reversed in the summer. These systems will not provide enough comfort in extreme summer heat or areas with extended periods of below-freezing weather. However, in mild climates, heat pumps can produce up to 400 percent of the energy they consume.
A wide range of heating systems exists beyond the traditional furnace. Explore your options and find the most efficient and attractive system for your budget and climate.