What is the difference between condensing and non condensing tankless water heaters?

Asked By: Rod Darbyshire | Last Updated: 24th February, 2020
Category: home and garden home appliances
4.2/5 (178 Views . 33 Votes)
A Non-Condensing tankless water heater will push these hot gases through its vent to the outside. They will then cool down outside the unit. Condensing Tankless Water Heaters extract the additional heat from the exhaust gases through various means and therefore exhaust cooler gases, usually around 100 degree F.

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Similarly, it is asked, which is better condensing or non condensing tankless water heaters?

Condensing Tankless Water Heater Reviews That's why condensing water heaters are more efficient than the non-condensing ones; energy-efficiency is amazing, it can go up to 98%. In addition, cheaper ventilation materials can be used because the temperature of exhaust gases is around 100 F.

Likewise, what is the best condensing tankless water heater? Top 5 Best Condensing Tankless Water Heaters Reviews

  1. Takagi T-H3-DV-N Condensing Natural Gas Tankless Water Heater.
  2. Rinnai RUR98iN Ultra Series Heater.
  3. Noritz NRC661-DV-NG Condensing Direct Tankless Hot Water Heater.
  4. Naiven NPE-240-A Tankless Gas Water Heater.
  5. Rheem RTGH-84XLP Condensing Propane Tankless Water Heater.

In respect to this, are condensing water heaters worth it?

Condensing water heaters are expensive but have lower operating costs, can perform much better (up to 40%) than their standard counterparts and are equipped with the most innovative features and technology - making them a good buy and long-term investment.

How do condensing tankless water heaters work?

Condensing Tankless Water Heaters These water heaters extract heat from exhaust gases through different means and produce cooler gases around 100 degrees Fahrenheit. These cooling gases produce condensation inside the unit.

32 Related Question Answers Found

What are the disadvantages of a tankless water heater?

The primary disadvantage of on demand or instant hot water heaters is the upfront cost. The smaller units that you often see won't produce enough hot water to serve most households. They'll only serve one faucet at a time—a problem if you want to shower while the dishwasher is running.

Do electric tankless water heaters need venting?

Electric tankless units do not require any type of venting, however, they do require a substantial amount of electricity. Outdoor gas tankless water heaters do not require venting, however, they do require a minimum amount of space around the unit.

Does tankless water heater need venting?

Installing a tankless water heater outside frees up indoor space and requires no additional venting. Traditional gas tank water heater require venting through the roof. Tankless water heaters use fans to blow exhaust from the unit horizontally, allowing vents to terminate on the side of a house.

Do you need a drain for a tankless water heater?

Every major brand of tankless requires a drain pan if the unit is installed where a leak can cause damage to the home or building. Architects and engineers understand that when a tankless water heater reaches the end of its life it will likely leak, just like a tank.

Do water heaters condensate?


When natural or propane gas burns in gas water heaters, a lot of moisture in products of combustion is released. So when the water vapor is chilled below the dew point (link wiki), water heater condensation occurs. The dew point is the temperature at which water vapor turns into the liquid state, called condensate.

How big of a tankless water heater do I need?

You'll need to be able to heat at least 5.2 gallons of water. So you'll need a tankless water heater that can produce at least a 60 degree rise in temperature at 5.2 gallons per minute.

What does non condensing mean?

It means RH less than 100%. There can be situations where RH is 100% and it is still non-condensing (because condensation requires condensation nuclei as well), but you cannot have a case where RH is less than 100% and there is condensation.

What is the best water heater brand?

15 Best & Most Reliable Water Heater Brands in the World
  1. A.O. Smith.
  2. Rheem. Rheem was founded in 1925 by two brothers, Donald and Richard Rheem – and with financial backing from a third brother, William.
  3. Kenmore.
  4. Bradford White.
  5. American Standard.
  6. American Water Heaters.
  7. Bosch.
  8. EcoSmart.

Should I buy a hybrid water heater?

A hybrid heat pump is best for an all-electric home. Your home must also have sufficient space for the system. A hybrid water heater requires more open area around it to work because it has to draw on heat in the air. If the water heater is in a small closet, it will lose efficiency.

What should I look for in a new water heater?


If you are on the hunt for a new water heater for your home or office, consider these five factors before you determine what to purchase.
  • Fuel Source. The most common residential water heaters run with gas or electricity as their fuel source.
  • Energy Efficiency.
  • Storage Capacity.
  • Space Required.

Should I buy a new water heater?

If your water tank is more than 10 years old, it may be time to consider replacement options. With proper maintenance, a gas water heater tank should last between eight to 12 years. Tankless water heaters require less maintenance than tank varieties.

Are newer water heaters more efficient?

New storage tank water heaters are required to operate more efficiently, and tankless (on-demand) water heaters are even more efficient than that. Typically, homeowners replace their old water heater with one of the same type that runs on the same fuel—natural gas or electricity.

Do hybrid water heaters save?

Hybrid water heaters save money. Hybrid water heaters can save you more than $300 a year compared to a conventional electric water heater.

What is indirect water heater?

An indirect water heater uses the main furnace or boiler to heat a fluid that's circulated through a heat exchanger in the storage tank. The energy stored by the water tank allows the furnace to turn off and on less often, which saves energy.

What brand of tankless water heater is best?


Best Tankless Water Heater Reviews
  • Rheem RTEX 13 Electric Tankless Water Heater.
  • Ecosmart ECO 27 Electric Tankless Water Heater.
  • Rinnai V65iN Indoor Tankless Water Heater – Natural Gas.
  • Rheem RTGH-95DVLN Direct Vent Tankless Natural Gas Water Heater.

What brand of water heater is the most reliable?

The Most Reliable Water Heater Brands On The Market
  • Rheem Water Heater.
  • A.O. Smith Water Heater.
  • Bradford White Water Heater.
  • Rinnai Water Heater.
  • Ecosmart Tankless Water Heater.
  • GE GeoSpring Water Heater.
  • Stiebel Eltron Water Heater.
  • Bosch Water Heater.