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How Does a Residential Boiler Actually Work?

In the U.S., roughly 9 million homes have boiler heating systems. More than half of the homes with boilers are in the Northeast.

Even though boilers are rare in American homes, those who do have them become major fans. Boilers offer radiant heat that can't be beat in cold climates.

But, how does a boiler heat a home?

The good news is, it's not as complicated as you might think. Read on to learn what a residential boiler is and how it works.

Boiler vs Furnace: What's the Difference?

A boiler and a furnace are both types of central heating systems, but boilers use water and furnaces use air.

Boilers use hot water or steam to warm your house. The water or steam travels through pipes or radiators and warms the objects in your home.

Furnaces blow hot air through a duct system, which warms the air in your home.

How Does a Boiler Work?

A fuel source such as natural gas enters your home and travels to the boiler. The gas comes out through small jets where it's ignited and turned into a heat source. The heat from the ignited gas goes through the heat exchanger, which warms a water pipe or tank of water.

If you have a hot water boiler, the hot water will travel through the pipes in your floor radiators with the help of a motorized pump. Once the water has heated the room, it travels back to the boiler to get reheated.

If you have a steam boiler, the heat exchanger will continue heating the water until it turns to steam. The steam will rise to the radiators in your home. Once it's heated the room, the steam turns back into water and returns to the boiler to start the process again.

If you can't visualize the cycle, a how a boiler works diagram might help.

The burning fuel produces combustion gases which the venting system takes out of your home. Without this vent, you'd have a buildup of dangerous carbon monoxide gas.

Types of Residential Boilers

While the application of boilers in your home is always the same—they all provide central heat—there are three types of boilers.

Gas fired boilers use natural gas or propane, but are not an option if you don't have access to natural gas. Oil fired boilers require a regular supply of oil which you'll need delivered to your home. Electric boilers are very efficient, but are expensive given the high cost of electricity.

There are also three types of radiators, which bring heat into each room. Steam radiators are larger metal units you might've noticed in older homes.

Hot water radiators are small and sit along the baseboard of each room. Hydronic radiant floor heating uses a network of coils to warm the floor of each room.

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Is Your Residential Boiler Acting Up? Call 1-800-PLUMBER Today

If you have a residential boiler in your home, you probably don't give it much thought. When it goes out in the winter, your boiler is all you can think about.

Now that you know how boilers work, you'll understand what kind of repairs your plumber might have to make. If you're having issues with your boiler, find a 1-800-Plumber near you.

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Excellent work by all, starting with the ease of making an appointment, the arrival of the service crew in a timely manner. They were on neatly dressed, very pleasant, explained everything and took the little extra steps to make the visit a success. I have used this plumber three times now and have always had exceptional service from them.

Jan C.

Enes provided a very thorough and professional inspection, assessment and proposal for my sewer drain replacement.

Rany W.

Great service. Professional. Let everything nice and clean. Consistent experience.

Sonya W.

Mark was great! He took the time to not only give a price, but explain everything a new system could do and how it would benefit them not just in heating and cooling, but dust reduction, utility bills, etc. Very Very pleased. read less

Satisfied Customer

Very professional and knowledgeable. The office staff communicated well and were helpful and courteous. We had a major plumbing job done. The cost for all they did was reasonable. The service pro tech, Emanuel Reyes did a great job! We will definitely recommend 1-800 plumber of Pearland,

Wanda N.

Joe and Kyle installed a new water heater. They were very professional and courteous. They explained my options and I was also offered a discount. I will definitely use this company again.

Linda B.

Kyle came when he said he would. He stayed in touch through out the day. Was very quick and efficient. If you need a plumber call Kyle.

Ashley C.

Had a plumbing issue on a Sunday afternoon. Joey came out and got the problem resolved. He was very courteous, professional and knew exactly what to do.

Satisfied Customer

Wow wow wow, Paul was excellent. Fair price, honest, did everything he said he would do and more. Fixed a line not slopped and 2 breaks at the tap. I recommend this business any day of the week. Excellent. I will use them for all my plumbing needs. He let me use my online coupon.

Debra's Passion Boutique

Chad was a pro..... personal..... and got right to work...... he explained each step he was taking and why .... very pleased with his. service and will highly recommend

Andy M.

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