Tank vs Tankless Water Heaters

One of the more exciting innovations our modern society has brought to us is tankless water heaters. Hand-in-hand with reliable air conditioner repair, these devices have served to improve our daily lives and given us a new outlook on a traditional industry. In fact, the Alberta government was recently handing out credits for the replacement of old, tank-style water heaters in an effort to get tankless varieties in more homes.

However, that doesn’t mean that tankless water heaters have become commonplace just yet. The program offered by the provincial government stopped with the new political party getting voted in, and they are still not provided as a standard part of new home construction.

But, is there any real benefit to a tankless water heater over the conventional system?

In today’s modern households, having a reliable and efficient water heating system is essential. When it comes to water heaters, there are two main options to consider: tank and tankless water heaters. Each type has its own advantages and disadvantages, making it important to understand the differences and choose the right option for your specific needs. In this comprehensive guide, we will explore the features, benefits, and considerations of both tank and tankless water heaters, helping you make an informed decision for your home.

Table of Contents

1. Introduction
2. Tank Water Heaters

• How Tank Water Heaters Work
• Advantages of Tank Water Heaters
• Disadvantages of Tank Water Heaters
• Choosing the Right Size
• Lifespan and Maintenance

3. Tankless Water Heaters

• How Tankless Water Heaters Work
• Advantages of Tankless Water Heaters
• Disadvantages of Tankless Water Heaters
• Choosing the Right Size
• Lifespan and Maintenance

4. Comparison: Tank vs. Tankless Water Heaters

• Energy Efficiency
• Space Requirements
• Installation Costs
• Hot Water Capacity
• Lifespan and Maintenance

5. Which Water Heater is Right for You?

• Considerations for Tank Water Heaters
• Considerations for Tankless Water Heaters
• Consulting with a Professional

6. Conclusion

Introduction

When it comes to choosing a water heater for your home, it’s important to consider factors such as energy efficiency, space requirements, hot water capacity, and installation costs. Both tank and tankless water heaters have their own unique features and benefits, so let’s dive into each option to help you make a well-informed decision.

Tank Water Heaters

How Tank Water Heaters Work

Tank water heaters, also known as storage water heaters, are the traditional and most common type of water heater found in homes. These systems consist of a large cylindrical tank that stores and heats a predetermined amount of water. The tank is insulated to retain heat and equipped with heating elements that warm the water to a set temperature.

When hot water is needed in your home, it is drawn from the top of the tank while cold water enters the bottom of the tank to replace the hot water. The tank continuously heats and maintains the stored water at the desired temperature, ensuring a constant supply of hot water.

Advantages of Tank Water Heaters

Traditional water tanks have many benefits. They are cost-effective, work great for a long time, and have a relatively low cost in associated maintenance. Truly, it used to be the case that an annual inspection of your water heater and any air conditioner repair was completed in the same HVAC company visit.

Furthermore, they offer reliable access to a stream of hot water that makes everyday water use convenient and straightforward. Dishes, showers, and ablutions are all benefited from traditional water heaters with tanks.

Tank water heaters offer several advantages that make them a popular choice for many homeowners:

1. Lower upfront cost: Tank water heaters are generally more affordable to purchase and install compared to tankless water heaters.
2. Simultaneous usage: Tank water heaters can supply hot water to multiple outlets simultaneously, making them suitable for households with higher hot water demand.
3. Simple operation and maintenance: Tank water heaters have a straightforward design and are easy to operate. They also require minimal maintenance, typically consisting of periodic flushing to remove sediment buildup.
4. Wide availability: Tank water heaters are widely available and can be found in various sizes and capacities to suit different household needs.

Disadvantages of Tank Water Heaters

Despite their advantages, tank water heaters also have some drawbacks to consider:

1. Limited hot water capacity: Tank water heaters have a finite amount of hot water storage. Once the hot water in the tank is depleted, it takes time for the tank to refill and heat the water to the desired temperature. This can result in temporary shortages of hot water during periods of high demand.
2. Higher energy consumption: Tank water heaters continuously heat and maintain the stored water, even when not in use. This can result in higher energy consumption and utility costs, especially if the tank is poorly insulated.
3. Limited lifespan: Tank water heaters typically have a lifespan of around 10 to 15 years. Over time, the tank may develop leaks or corrosion, requiring replacement.

Choosing the Right Size

Choosing the right size tank water heater is crucial to ensure an adequate supply of hot water for your household. The size of the tank is determined by factors such as the number of occupants in your home, the number of bathrooms, and the hot water usage patterns.

To determine the appropriate tank size, consider the following:

1. Peak hour demand: Calculate the total hot water usage during the busiest hour of the day. This includes activities such as showers, laundry, and dishwashing. The tank should have enough capacity to meet this peak hour demand.
2. First-hour rating (FHR): The FHR indicates the amount of hot water the tank can supply in the first hour of use. It is typically listed on the water heater’s Energy Guide label. Ensure that the FHR matches or exceeds your household’s peak hour demand.

Consulting with a professional plumber can help you accurately determine the right tank size for your specific needs.

Lifespan and Maintenance

Tank water heaters require regular maintenance to ensure optimal performance and extend their lifespan. Here are some maintenance tasks to consider:

1. Flushing the tank: Over time, sediment and mineral deposits can accumulate at the bottom of the tank, affecting its efficiency. Flushing the tank annually helps remove these deposits and improve performance.
2. Checking the anode rod: The anode rod helps prevent corrosion inside the tank by sacrificing itself. Regularly inspecting and replacing the anode rod can help prolong the lifespan of the tank.
3. Insulating the tank: Adding insulation to the tank and hot water pipes can reduce heat loss and improve energy efficiency.

By following these maintenance practices, you can maximize the lifespan of your tank water heater and ensure reliable hot water supply.

Tankless Water Heaters

Likely the first thing you will hear about tankless water heaters is the cost associated with their purchase. While it is true that they are not as cheap as traditional water heaters, they do offer a fair amount of advantages in lieu. Firstly, they are much more economical because they do not have a tank to fill with water. Secondly, they are often as durable as traditional systems, and you can expect the same service life out of either system.

How Tankless Water Heaters Work

Tankless water heaters, also known as on-demand water heaters, provide hot water only when it is needed. Unlike tank water heaters, which store and continuously heat a large volume of water, tankless water heaters heat water directly as it passes through the unit.

When a hot water tap is turned on in your home, cold water flows through the tankless water heater. The unit’s heating elements, powered by gas or electricity, rapidly heat the water to the desired temperature. This instantaneous heating process eliminates the need for a storage tank, providing hot water on demand.

Advantages of Tankless Water Heaters

The most significant advantage of the tankless water heater is the lessened environmental impact. As mentioned, not having to fill a tank preserves water usage and also reduces energy costs. Energy costs further reduce because you don’t need to maintain a large amount of hot water as you produce it when you turn on the tap instead.

Tankless water heaters offer several advantages that make them an attractive option for homeowners:

1. Energy efficiency: Tankless water heaters only heat water when it is needed, eliminating standby heat loss. This results in lower energy consumption and reduced utility costs.
2. Unlimited hot water supply: Tankless water heaters provide a continuous supply of hot water, eliminating the risk of running out during periods of high demand.
3. Space-saving design: Tankless water heaters are compact and can be mounted on walls or placed in compact spaces, making them ideal for homes with limited space.
4. Longer lifespan: Tankless water heaters have a longer lifespan compared to tank water heaters, typically lasting over 20 years with proper maintenance.

Disadvantages of Tankless Water Heaters

Despite their benefits, tankless water heaters also have some considerations to keep in mind:

1. Higher upfront cost: Tankless water heaters generally have a higher initial cost compared to tank water heaters. This includes the unit itself, installation, and any necessary upgrades to accommodate the system.
2. Limited hot water flow rate: While tankless water heaters provide hot water on demand, there is a limit to the flow rate they can handle. If multiple hot water outlets are used simultaneously, the flow rate may decrease, affecting water pressure.
3. Initial lag time: Unlike tank water heaters that provide hot water immediately, tankless water heaters require a brief lag time for the heating elements to activate and heat the water. This can result in a slight delay before hot water reaches the tap.

Choosing the Right Size

Choosing the right size tankless water heater is crucial to ensure an adequate supply of hot water for your household. The size of the unit is determined by factors such as the incoming water temperature, desired hot water temperature, and the maximum flow rate required.

To determine the appropriate size, consider the following:

1. Temperature rise: Calculate the temperature difference between the incoming cold water and the desired hot water temperature. This will vary depending on your geographic location and personal preference.
2. Flow rate: Determine the maximum flow rate required by considering the number of hot water outlets that may be used simultaneously. This includes showers, faucets, and appliances.
3. Unit capacity: Choose a tankless water heater with a capacity that meets or exceeds the calculated flow rate and temperature rise.

Consulting with a professional plumber can help you accurately determine the right size tankless water heater for your specific needs.

Lifespan and Maintenance

Tankless water heaters typically have a longer lifespan compared to tank water heaters. With proper maintenance, you can maximize their longevity and performance. Here are some maintenance tasks to consider:

1. Flushing the system: Tankless water heaters can accumulate mineral deposits over time, affecting efficiency. Flushing the system annually or as recommended by the manufacturer helps remove these deposits.
2. Checking the combustion chamber: For gas-powered tankless water heaters, regular inspection of the combustion chamber ensures proper functioning and safety.
3. Replacing filters: Some tankless water heaters have filters that need to be cleaned or replaced regularly to prevent clogging and maintain optimal performance.

By following these maintenance practices, you can extend the lifespan of your tankless water heater and enjoy reliable hot water for years to come.

Comparison: Tank vs. Tankless Water Heaters

Energy Efficiency

One of the key differences between tank and tankless water heaters is their energy efficiency. Tankless water heaters are generally more energy-efficient because they only heat water as it is needed, eliminating standby heat loss. On the other hand, tank water heaters continuously heat and maintain a large volume of water, resulting in higher energy consumption.

Space Requirements

When it comes to space requirements, tankless water heaters have a significant advantage. Their compact design allows for flexible installation options, such as mounting on walls or placing in tight spaces. Tank water heaters, on the other hand, require a dedicated space for the storage tank, which can take up valuable floor space in your home.

Installation Costs

The installation costs for tank and tankless water heaters can vary. Tank water heaters generally have lower upfront costs since they are simpler to install and do not require additional plumbing or electrical modifications. In contrast, tankless water heaters may require upgrades to accommodate the system, such as increased gas line capacity or electrical wiring, resulting in higher installation costs.

Hot Water Capacity

Tank water heaters have a predetermined hot water capacity based on the size of the storage tank. Once the hot water in the tank is depleted, it takes time for the tank to refill and heat more water. This can result in temporary shortages of hot water during periods of high demand.

Tankless water heaters, on the other hand, provide continuous hot water on demand. As long as the flow rate and temperature rise are within the unit’s capacity, you can enjoy an uninterrupted supply of hot water.

Lifespan and Maintenance

In terms of lifespan, tankless water heaters generally outlast tank water heaters. With proper maintenance, tankless water heaters can last over 20 years, while tank water heaters typically have a lifespan of 10 to 15 years. Both types of water heaters require regular maintenance, such as flushing and inspecting, to ensure optimal performance and longevity.

Which Water Heater is Right for You?

Choosing the right water heater for your home depends on various factors, including your hot water needs, budget, space availability, and energy efficiency goals. Here are some considerations for both tank and tankless water heaters:

Considerations for Tank Water Heaters

1. If you have a lower upfront budget and don’t mind the occasional shortage of hot water during peak demand periods, a tank water heater can be a cost-effective option.
2. Tank water heaters are suitable for households with predictable hot water usage patterns and fewer simultaneous hot water demands.
3. If space is not a constraint and you prefer a simpler system with lower maintenance requirements, a tank water heater may be the right choice.

Considerations for Tankless Water Heaters

1. If energy efficiency and a continuous supply of hot water are important to you, a tankless water heater can be a worthwhile investment in the long run.
2. Tankless water heaters are ideal for households with high hot water demands and simultaneous usage of multiple hot water outlets.
3. If space is limited or you prefer a compact and modern-looking system, a tankless water heater offers space-saving benefits.

Consulting with a Professional

To ensure you make the best decision for your specific needs, it’s recommended to consult with a professional plumber. They can assess your hot water requirements, evaluate your home’s infrastructure, and provide expert advice on the most suitable water heater option.

Conclusion

Choosing the right water heater for your home is an important decision that can significantly impact your day-to-day comfort and energy efficiency. Both tank and tankless water heaters have their own unique features and benefits, so it’s crucial to consider factors such as hot water demand, space availability, installation costs, and long-term energy savings. By understanding the differences between these options and consulting with a professional, you can make an informed choice and enjoy reliable hot water for years to come.

But, what are your thoughts? Do you believe that there is an equal amount of benefits for either system or do you fancy that one is superior to another in terms of quality or usage? Let us know on our social media what you think!

Get energy-efficient and space-saving solutions today! Call us at 403-250-7232 to schedule a consultation with our expert team at ProStar Plumbing & Heating.

Since 1996, ProStar Plumbing & Heating has been providing Calgary with reliable, hassle-free, quality plumbing solutions. When things go wrong, the community trusts us to handle it with our skills, expertise and personal attention. We can help you with a range of plumbing and heating services, including water leak detection and repairs, drain cleaning, sewer repair, furnace repair and much more. With 24/7 emergency service, no overtime charges, upfront pricing and the best team in the business, you know we’re for you. Whether you need your drain cleared or furnace installation in Calgary, contact ProStar today on 403-250-7232

FAQs

1) Which is better, a tankless or tank water heater?

Both tankless and tank water heaters have their advantages and disadvantages. Tankless water heaters are more energy-efficient and provide endless hot water, but they have a higher upfront cost. Tank water heaters are generally cheaper to purchase and install, but they have limited hot water capacity. The better option depends on your specific needs and preferences.

2) Is it worth replacing a tank water heater with a tankless one?

It depends on your situation. If you value energy efficiency, endless hot water, and have the budget for it, replacing a tank water heater with a tankless one can be worth it in the long run. However, if your current tank water heater meets your needs and you’re not concerned about energy consumption, there may be no urgent need to replace it.

3) Is it better to switch to a tankless water heater?

Switching to a tankless water heater can have several benefits. Tankless water heaters are more energy-efficient, which can lead to lower utility bills. They also provide a continuous supply of hot water, eliminating the need to wait for a storage tank to refill. Additionally, tankless water heaters take up less space and have a longer lifespan compared to traditional tank water heaters.

4) What is not a benefit of a tankless water heater?

While tankless water heaters offer numerous benefits, they do have limitations. One of the key drawbacks is the higher upfront cost. Tankless water heaters tend to be more expensive to purchase and install compared to traditional tank water heaters. Additionally, if you have a large household with simultaneous hot water demands, a single tankless unit may struggle to meet the demand, requiring the installation of multiple units.

5) Are tankless water heaters suitable for all households?

Tankless water heaters can be suitable for many households, but it depends on factors such as hot water demand, budget, and available space. Smaller households with lower hot water requirements may find tankless water heaters more suitable. However, larger households with high hot water demand may need multiple tankless units or may find it more practical to stick with a traditional tank water heater.

6) What are the cost considerations for tankless water heaters?

When considering the cost of a tankless water heater, it’s important to account for both the upfront cost and long-term savings. While tankless units have a higher initial investment, they can provide energy savings over time, potentially offsetting the higher cost. Additionally, installation costs can vary depending on factors such as the complexity of the installation and the need for any additional upgrades. It’s recommended to consult with a professional to get an accurate estimate of the overall cost.