For the average homeowner, approximately 20 percent of total energy expenditure can be attributed to water heating. Over time, the price of keeping warm water flowing will add up, and it’s probably in your best interest to compare the water systems available and ensure that you’ve got the option in place that best suits your needs.

When comparing traditional and tankless hot water systems, there are significant differences to note between the two, including cost, efficiency, size, warranties, and more. Below, we’ll explore some of these differences, alongside similarities, between the two most common hot water tank systems available.

Whether you’re looking to upgrade from an old tankless system or transition from a traditional hot water tank, our team is here to help. Thermenergy is an industry leading installer of Tankless Hot Water Systems in the GTA, successfully equipping over 150 clients each year with the tankless hot water systems they need to warm the water in their homes. For more information about tankless water heaters please check our all you need to know about tankless water heaters blog,

Tankless Condensing Water Heaters

NPE A2 SERIES

2″ PVC up to 75 feet and 1/2″ gas up to 24 feet
High efficiency up to 0.95 UEF and up to 15:1 TDR
Durable dual stainless steel heat exchangers
EZNav™ multi-line control with built-in intuitive software

NPE S2 SERIES

2″ PVC up to 75 feet and 1/2″ gas up to 24 feet
High efficiency up to 0.96 UEF and up to 15:1 TDR
Durable dual stainless steel heat exchangers
EZNav™ multi-line control with built-in intuitive software

Tankless Non-Condensing Water Heaters

NPN-U SERIES

Patented NaviTech™ stainless steel heat exchanger
Stainless steel burner with lean/rich stable cleaner burning technology
0.81 UEF for all models
NPN-Universal is the only non-condensing unit that can be used inside or outside
Strong residential and commercial warranties
NaviVent™ concentric 3″ x 5″ venting

NPN-E Series

Patented NaviTech™ stainless steel heat exchanger
Stainless steel burner with stable cleaner burning technology
0.81 UEF for all models
NPN-E is specifically designed for outdoor use only
Strong residential and commercial warranties
NaviVent™ concentric 3″ x 5″ venting

Condensing Combi-Boilers

NFC-H Series

Dual inputs of 210,000 BTU/H for DHW and up to 199,900 BTU/H for heating
Space saving and light weight design
Dual Venturi and field gas convertibility
Easy access to DHW module and valves
Low noise levels
TDR 15:1 for heating and for DHW

NCB-H Series

Highest DHW maximum BTU’s in residential combi-boilers up to 210,000 per hour
Highest DHW flow rate @ 70°F rise up to 5.4 GPM
Highest number of BTU sizes for the North American residential combi-boiler market
Highest residential combi DHW TDR 15:1 for all models
Highest residential combi heating TDR up to 11:1
Highest number of built-in zone controls for valves or pumps up to three

Condensing Heating Boilers

NFB-H Series

Advanced user interface with intuitive text display and Quick Dial Wheel for easy navigation
Common venting up to 8 boilers
Built-in 3 zone pumps or 3 zone valves powered connections
Easy access to DHW module and valves
Compact, light weight, wall hung design saves space over traditional floor standing boilers
Up to 15:1 turndown ratio

NHB Series

Navien innovation in a compact wall-hung condensing boiler
NHB Integrated control
Adjustable heat capacity
Freeze protection
Manifold Kits
Field gas convertible

NFB-C Series

Lower operating costs with the industry’s leading thermal effciency at TE 97.5%
Cascading and common venting capable
Best-in-class training and technical support
One of the industry’s best warranties
BMS connectivity (Modbus, BACnet and LonWorks)
Robotic and automated manufacturing technology for unmatched quality control

	Hot Water Tank	Tankless system
Cost	Hot water storage tanks must keep water hot at all times, and require a minimum temperature of 140 degrees Fahrenheit to prevent diseases such as legionella. This constant temperature moderation means that you’ll be using more energy to keep water warm and increase your energy bill in the process.	Tankless systems work to provide hot water on demand and will only consume energy when needed. The systems will idle until water is drawn, resulting in a decreased operational cost.
Efficiency	65% to 85% efficient. This means that for every $1 you spend on energy, 15-35 cents of it will be wasted.	97.5% efficient. This means that for every $1 you spend on energy, 2-3 cents of it will be wasted. This is a major efficiency boost when compared to traditional hot water tanks.
Capacity	Limited. Hot water tanks can only provide heat to a maximum of 65% of their capacity. As an example, a 50-gallon tank can only provide a maximum of 32 gallons of hot water each hour.	Unlimited. Tankless systems can provide heat to 100% of their water capacity. As an example, a 50-gallon tank can provide a maximum of 50 gallons of hot water each hour, a major improvement over traditional hot water tanks.
Size	Large. Hot water tanks are big in size and require floor space in your home.	Small. Tankless systems are compact in design and hung on a wall, requiring no floor space.
Life Expectancy	10 to 15 years. Once a hot water tank begins to wear and leak it becomes unfixable and must be replaced.	20 years. Tankless systems are repairable over their lifetime and can last for 20 years or more if maintained.

How Tankless Hot Water Systems work:

As hot water taps are opened, water in the home will begin to run through the tankless system.
As the water moves through the system, flow sensors will activate. This causes the ignition assembly to fire up.
Once the ignition assembly is live, the combustion blower will start and the main control will check for safety and activation igniters.
Once complete, the gas valve will open and allow for a steady flow into the combustion chamber. This supply of gas will be the exact amount needed to create a constant flow rate.
Once the gas is flowing, the igniter will trigger and begin to heat up the water that is flowing through the heat exchanger tubes.
The water will continue to flow through the primary and secondary heat exchanger tubes, absorbing the heat produced by the burners as it continues to circulate
The system’s main control will actively monitor the temperature of the water flowing from the tankless system and will adjust the gas valve as needed to ensure stable temperatures.
Following successful temperature moderation, the water will arrive at the designated faucet at a temperature and flow rate that is consistent with the end user’s specifications.

The image will better explain how tankless hot water systems operate

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It is crucial to design your tankless system as per your need of hot water system, to make sure you get hot water all the time even at any temperature of city main water. Our specialist can help you design and will explain the installation of tankless system

Benefits of Tankless Hot water system

On Demand : These units heat water only when you turn on the faucet. They usually operate on natural gas or propane. The main advantage is that they eliminate the extra cost of keeping 40 to 50 gallons of water hot in a storage tank, so you waste less energy.
High Efficiency: Tankless are upto 98% efficient which saves you on energy bills, compare to 70% eff. conventional hot water system.
Space: Tankless are compact in size and installed at wall so it saves you lots of floor space which can be used for storage or other purpose.
Water quality: Tankless has facility to flush sediment and scale built up for better quality of water.

Repair

No hot water?

Don’t worry we can any brand of hot water tank / tankless.

There is nothing more intrusive than waking up to an ice cold shower. Let us take care of it.

Call us Now

Maintain

We do 15 point check up and inspection on your tankless system.

Includes:

• Flushing
• CO testing
• Check amps on electric pump & motors.
• Check all electrical & gas connections.
• Inspect venting

Call for Schedule

New Installation

Are you running out of hot water in shower?

Is your hot water need increased?

Don’t worry we can help design right tankless system just for your needs.

We will also drop off / scrap your old tanks to rental company.

5 years free protection on Tankless system

We have monthly finance or rental option for ease of payment.

We have monthly finance or rental option for ease of payment.

Call for free consultation

Why choose ThermEnergy?

Free consultation: Our expert will help you choose right product for your needs, explains warranty and protection plans, government rebates, and installation details at no cost.
Same day Installation: We understand how uncomfortable if HVAC system doesn’t work, we guarantee your installation within 24hrs.
Top of line products: We only recommends you most efficient, reliable and perfectly matched system for your needs.
Team of Experts: Our techs, installers are best in industries with lots of experience, licensed and insured. Who will make sure your system works safe, efficiently and reliable.
Warranty: We back our product and installation with extended warranties for part and labor. 10 year protection plan available.
Ease of Payment: Provides monthly finance, rental or deferral options at very low interest rates.