Types of Heating Systems - Pros and Cons

Types of Heating Systems - Pros and Cons

Furnaces
Most homes in the U.S. use a central heating system like a furnace to provide their heating. A furnace works by blowing heated air throughout the home through a system of ducts. It can be powered by electricity, natural gas, or fuel oil.
Pros - They are relatively inexpensive and their life expectancy is 15-30 years.
Cons - The blower fan can be loud

Boilers
Also considered a central heating system, boilers are special-purpose water heaters. While furnaces carry heat in warm air, boiler systems distribute the heat in hot water, which gives up heat as it passes through radiators or other devices in rooms throughout the house. The cooler water then returns to the boiler to be reheated. Hot water systems are often called hydronic systems. Residential boilers generally use natural gas or heating oil for fuel.
Pros - Easier to maintain heating only in rooms that need it.
Cons - Expensive to install and requires a minimum temperature to prevent pipes from freezing.

Heat Pumps
Heat pumps are simply two-way air conditioners. During the summer, an air conditioner works by moving heat from the relatively cool indoors to the relatively warm outside. In winter the heat pump takes in heat from the air outside with the help of an electrical system, and discharging that heat inside the house. Almost all heat pumps use forced warm-air delivery systems to move heated air throughout the house.
Pros - Can provide your home with both heating and cooling if you live in a mild climate.
Cons - Some types can be expensive to install.

Active Solar Heaters
Active solar heating systems use solar energy to heat either liquid or air and then transfer the solar heat to the interior space or to a storage system for later use. If the solar system cannot provide enough space heating, a back-up system provides the additional heat. Liquid systems are more often used when storage is included, and are well suited for radiant heating systems, boilers with hot water radiators, and even absorption heat pumps and coolers.
Pros - Can reduce your fuel bills.
Cons - May need a second heating source, which makes the initial purchase more expensive.

Electric Space Heaters
Portable electric heaters are affordable to buy, but expensive to use. These resistive heaters convert electric current from the wall socket directly into heat, like a toaster or clothes iron. Just remember, electric resistance heat is usually the most expensive form of heat.
Pros - Can be used for a number of distribution heating systems.
Cons - Can be expensive to operate compared to combustion appliances.

Types of Boilers

Types of Boilers

Boilers are one of the most common home heating systems especially in older houses in the Northeast and other cold-climate areas. Boilers are the appliances that heat water, and then distribute hot steam or hot water along a series of pipes throughout the home. Steam is sent to radiators, and hot water flows to radiators or radiant heating systems. Boilers are powered by natural gas, heating oil, propane, electricity or a biodiesel-oil blend. New systems are very energy efficient.

Types of Boilers

Boilers are also known as central heating systems because the equipment is in a central location, and the heat is spread throughout the home. But unlike other heating methods, there’s usually a gap in time between the boiler starting and the heat being distributed.

Most boilers produce steam or hot water using natural gas or heating oil, and all are either condensing or non-condensing. Boilers are required by the federal government to be at least 80 percent efficient. Some boiler can have efficiencies as high as 98.5 percent. All boiler types usually last 15 to 30 years.

Gas-Fired Boilers

Gas-fired boilers are fueled by either natural gas or propane, and are highly efficient. Natural gas is not available everywhere though, and some homeowners at the end of a gas pipeline pay higher fuel prices. Propane is generally more expensive than natural gas, but it’s more available than natural gas.

Oil-Fired Boilers

Oil-fired boilers are common in areas that have limited access to natural gas. If you have an oil-fired boiler, you’ll need to have heating oil delivered and stored in tanks, and your operating costs will depend on the rise and fall of oil prices.

Some boiler companies now offer models that burn biodiesel fuel, which produces less pollution than regular heating oil. Depending on oil prices, biodiesel heating oil can be less expensive with standard oil. However, because it burns cleaner and lubricates the system, biodiesel fuel can also reduce your boiler service and cleaning costs.

Electric Boilers

Electric boilers are highly energy efficient. But they’re usually not economical because electricity costs are higher than other fuel types in many parts of the country. You may also consider a heat pump if you choose and electric heater.

Boiler Safety

Boiler Safety

The safe and efficient operation of boilers and domestic water heaters is necessary for the operation of most residential and commercial facilities. Improvements in designs and control systems have made modern units safer and more efficient than before.

But there are other factors to consider to ensure safety and efficiency. In addition to a well designed system, scheduled inspections and testing done by a technician or service professional could keep your boiler running safely and efficiently.

Safety Devices

All boilers and domestic water heaters have a variety of built-in devices to help ensure their safe operation. Like other components of major appliances, they require scheduled maintenance to make sure they’re operating properly. Boiler technicians and professionals pay close attention to three key safety devices to protect the safe operation of your home’s boiler:

Safety valves. The safety valve is the most important safety device in a boiler or domestic hot-water system. It is designed to relieve internal pressure if a range of failures occur within the system. Although it is simple in design and straightforward in operation, something as minor as corroded or restricted flow inside of the valve and its related piping can affect the overall operation.

Water-level control and low-water fuel cutoff. Many systems combine these two separate boiler-safety functions into one unit. They’re designed to make sure the water level inside of the boiler never falls below a certain amount. If that ever happens, the system is designed to shut down the boiler by cutting off its fuel. Proper functioning requires operators to make sure there is no build-up of sludge or debris within the system that would interfere with its detection and operation.

Water-gauge glass. Even with a functioning water-level-control system, it’s important for your service professional to verify the actual level of water in the system. Here, too, a build-up of sludge and debris can give false level indications.