Asked by: Krasimir Pegueroles
home and garden indoor environmental quality

What is a hot water heat exchanger?

Last Updated: 19th March, 2020

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A hot water exchanger is used in production of domestic hot water. The hot water exchanger can be connected to a district or central heating system. In a plate heat exchanger, the cold water passes the heat-bearing medium through small channels. The two liquids are separated by plates.

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Moreover, what is the heat exchanger and what is it used for?

Put simply, a heat exchanger is a device which transfers heat from one medium to another, a Hydraulic Oil Cooler or example will remove heat from hot oil by using cold water or air. Alternatively a Swimming Pool Heat Exchanger uses hot water from a boiler or solar heated water circuit to heat the pool water.

Also Know, can a heat exchanger be repaired? Unfortunately, heat exchangers cannot be repaired. When a heat exchanger cracks or rusts through it must be replaced. Because the heat exchanger is at the center of the furnace, nearly the whole furnace must be disassembled. Even if the parts are covered under warranty, the labor and freight will start around $500.

Also question is, how much does a heat exchanger cost?

Replacing a furnace heat exchanger costs $1,500 on average with a typical range between $1,000 and $2,000. Most have a warranty of 10 to 20 years, which usually only covers the price of the exchanger, which typically ranges from $500 to $2,000. Labor alone runs an average of $500.

What is the principle of heat exchanger?

The essential principle of a heat exchanger is that it transfers the heat without transferring the fluid that carries the heat. Photo: How a simple heat exchanger works.

Related Question Answers

Lamara Yalamov

Professional

What are the different types of heat exchanger?

What are the different types of heat exchanger?
  • Parallel-flow and counter-flow heat exchanger.
  • Finned and Unfinned tubular heat exchanger.
  • U-tube, single pass straight and two pass straight heat exchanger.
  • Plate-and-frame heat exchanger.
  • Pate-fin heat exchanger.
  • Microchannel heat exchanger.

Kolyo Mindel

Explainer

Which type of heat exchanger is more efficient?

Each of the three types of heat exchangers (Parallel, Cross and Counter Flow) has advantages and disadvantages. But of the three, the counter flow heat exchanger design is the most efficient when comparing heat transfer rate per unit surface area.

Cuihong Ploogt

Explainer

What is difference between heat exchanger and condenser?

A condenser is a device which converts vapour into the liquid state whereas a heat exchanger is a device which is used for heat recovery also to transfer heat from two fluids. Heat exchanger only heat is transferred without phase change and heat is transferred along with the phase change in the condenser.

Olesea Antwerp

Explainer

How many types of exchangers are there?

There are two main types of regenerative heat exchangers—static heat exchangers and dynamic heat exchangers.

Mose Pond

Pundit

Is boiler a heat exchanger?

Since exchange of heat occurs in the Boilers, Boilers can be termed as a Heat Exchanger. But there's more to a Boiler, than just being a Heat Exchanger. But A Boiler generates heat through chemical reaction of the fuel, and exchanges the heat with the water to produce steam or heated water depending on the application.

Ibis Goldsche

Pundit

How does a heatpump work?

A heat pump is an electrical device that extracts heat from one place and transfers it to another. Heat pumps transfer heat by circulating a substance called a refrigerant through a cycle of evaporation and condensation. A compressor pumps the refrigerant between two heat exchanger coils.

Emiko Plogert

Pundit

Is it worth replacing heat exchanger?

If your heat exchanger is cracked, your furnace is probably nearing the end of its life (18-20 years). If that's the case, then it's usually not worth the money to replace the heat exchanger. No matter who you ask, replacing a heat exchanger will be expensive.

Codruta Chandiramani

Pundit

What are the symptoms of a bad heat exchanger?

3 Signs Of A Bad Heat Exchanger
  • Cracks. A cracked heat exchanger is one of the most basic and common symptoms, and also often the most drastic sign of a damaged heat exchanger.
  • Discoloration. Sometimes a cracked heat exchanger has cracks that are simply too small and thin to be directly observed.
  • Odd Furnace Flame Behavior.

Aoife Vossholer

Pundit

What happens when heat exchanger fails?

The problem is that all heat exchangers will eventually fail, developing holes or cracks that allow those poisonous gases to leak out and contaminate your home's air. These leaks can be extremely dangerous, even deadly. In fact, cracked heat exchangers are one of the major causes of carbon monoxide poisoning in homes.

Bertin Pioreck

Teacher

Should I replace heat exchanger or buy new furnace?

So, if your furnace is still under its labor warranty, we definitely recommend replacing just the heat exchanger since most of the repair cost will be covered under warranty. But if your furnace is no longer under the labor warranty and it's over 10 years old, you might as well just replace the furnace completely.

Monserrat Dall

Teacher

What happens when a heat exchanger goes bad?

There's soot buildup inside the heat exchanger. If the furnace has a soot buildup inside of it, then chances are that the heat exchanger is damaged. This is a sign that the burner is not burning properly and needs to be fixed. The cause can be anything from tilted burners to cracks in the heat exchange itself.

Dacia Olavarrieta

Teacher

How long should a heat exchanger last?

In the past, heat exchangers were often built with heavy metals, such as cast iron. These exchangers can last as long as 30 or 40 years, much longer than the steel exchangers most manufacturers build today. Modern stainless or aluminized steel heat exchangers typically have a life span of 15 to 25 years.

Jahangir Mniszech

Reviewer

How long does a furnace last?

Average Furnace Lifespan
While some furnaces can last over 40 years (extremely rare), the average lifespan of a typical gas furnace is around 15-30 years. As long as you have scheduled yearly furnace maintenance, your furnace should easily last over 15 years.

Kerman Ezequiel

Reviewer

Can I run my furnace with a cracked heat exchanger?

If it is your heat exchanger, you cannot run your furnace, even if it seems to be running fine. The gases will continue to seep into your home's air. Many companies, upon finding a cracked heat exchanger, will shut your furnace down so you cannot run it.

Bekkaye Eyraud

Reviewer

Can you weld a heat exchanger?

Cracks or holes in the heat exchanger in small residential furnaces and rooftops cannot be repaired. On larger industrial equipment some heat exchangers can be welded safely to seal any leaks but it is a difficult job to do. A long-term repair for commercial heat exchangers is possible but not very practical.

Maica Wiehmert

Reviewer

How much does it cost to replace a gas furnace?

The national average cost of a standard efficiency natural gas furnace ranges from $2,150 to $5,900 with most homeowners paying around $3,100. The price may vary based on brand, complexity of install, and the efficiency of the new unit. Get free estimates from furnace replacement pros near you.

Maricielo Matxinbarrena

Supporter

Can you replace a heat exchanger on a gas furnace?

Your HVAC technician will replace the heat exchanger so your furnace will function safely. Heat exchangers offer a typical service life between 10 to 20 years – depending on the life of your furnace and other factors, you may decide to replace the entire furnace if the heat exchanger requires replacement.

Taida Paulsmeier

Supporter

Can you clean a furnace heat exchanger?

Use the small vacuum to remove any dirt or debris that may have accumulated throughout the life of this heat exchanger. Once the dust is removed you can then wipe down the tubes with soapy water and dry them off with a towel. You can also let them air dry if you prefer.

Sheba Larraul

Supporter

What does a furnace heat exchanger look like?

A furnace's heat exchanger uses some type of fuel to combust inside of it, creating heat and getting very hot. Your blower motor (aka your 'fan') then blows air over this heat exchanger (like blowing over hot soup) and into your ductwork, where it is distributed throughout your house.