Tankless Water Heater Guide [Some Key points]
Water heater accounts for 13% electricity consumption of our homes. Necessary information about tankless water heater will not only let a consumer make this percentage less but also contribute to his higher level of satisfaction.
There are numerous issues to consider for before you buy a tankless unit, like why you should switch to a tankless system if already has a tank water heater, How many GPM is required, which brand to consider, what the standard water supply of a well etc is. Here is a briefing on all these topics, to help you buy the right tankless water heater for your home.
How to Choose Tankless Water Heater Brands?
In the market there are more than 20 brands who currently offer tankless water heater. Most are US based but Germany, China, Japan has also conquered remarkable market share.
When you navigate through Amazon products you will see many units are not marketed outside US. But according to a study of 2015 it is Europe that account for the largest market share of the global tankless water heater market, it is calculated to grow at 3.8% till 2024. Second largest market is North America (includes Canada) and this market is anticipated to grow most in coming years.
Some key players in global market are
- Rheem Manufacturing Company
- Rinnai Corporation
- A.O. Smith
- NORITZ AMERICA CORP.
- Ariston Thermo Group
- Kyungdong Navien Co.,Ltd.
- Stiebel Eltron GmbH & Co. KG
- Bosch Thermo technology
- Bradford White Corp.
- Haier Electronics Group Co, Ltd.
- Bajaj Electricals Ltd.
There are so many issues related to choosing a heater that prevails over the choice of a suitable brand. Your inlet temperature, your regions compliance codes, environmental issues you’re your preference to stick to it ,size, capacity, efficiency, ability to bypass initiating time. When you sum up all the issues the choice cannot be a single one. The choice of brand can be based on 4 points.
Best-selling brand- Rheem
In the market some models of Rheem electric and gas heaters are regarded as best seller for their multiple added services like-built in recirculation pump, auto maintenance feature, and higher efficiency.
Best value brand-Eco smart
Water heaters from Eco smart are equipped with self modulating technology and claims to reduce power consumption up to 50%.Most models are reasonably priced, light, durable and only one with limited life time warranty.
Best brand for medium demand-Takagi
Takagi the 60 year old superior Japanese brand is the First tankless water Heater Company who are utilizing the air-fuel ratio rod, direct convertible vent, thermal efficiency rating of up to 95%. They are capturing North American market through their efficient product and safety features. Some models of other brands are also having very good reviews for medium capacity.
Best brand for high demand-Rheem Gas heater, Takagi Gas heater
Gas heaters are faster than electric heaters and account for less energy cost, this is why when you are looking for a huge demand home’s tankless unit you are at winning end by choosing a gas water heater. Rheem and Takagi are again making their mark on the market of high capacity water heaters.
What Are The Advantages and Disadvantages of Tankless Water Heaters?
Advantages of tankless water heaters are trolling the market like a behemoth creature. they are evident and open, very difficult to shirk. Like-
Size-A tank less heater’s best thing is it saves space, like you moved from TV- to LCD, Computer to Laptop our fascination for better and smaller appliances does not seem to end in near future this is why You are likely to like a tank less water heater which in 5-8 times smaller and light than tank water heater.
Energy and cost saving-They do not waster electricity as much as conventional heaters do, only runs when senses a water flow, thus saves electricity 20-40% depending on usage rate.
Green movement-Tankless water heaters do not emit any green house gas.
Durable-They last more than 12 years so even if you have paid 3 times more on installation you return on investment is realized before half of water heater’s life is spent.
Disadvantages of tankless water heaters are also part of a consumer’s concern. After all tank water heaters are still not obsolete so before making the decision one should be able to evaluate the pros and cons.
High price-Tankless water heater is more expensive than traditional ones, simple rule-more high tech pricier, so the price is totally justified.
High installation cost-You should beware of this fact that a tank less water heater installation will cost almost as much as it’s purchasing cost especially if you need a plumbing job done.If you are simply replacing a unit at an existing setup and need no plumbing only electric job than the cost is not so high. Once it is done next time the cost diminishes much because you already know the details and have a set up.
How many GPM do you need for a shower?
Your ability to calculate the GPM before you buy Tankless water heater is a great advantage. If you know this piece of information life becomes easy with tankless water heater. Generally Showers need 1 to 2.5 GPM .1 -1.5 GPM for the power saving showers and 1.5-2.5 GPM for other regular shower heads. So when buying tankless water heater you should keep this in mind and buy one heater based on the speculation how many shower can be an in use at a time.
How many gallons of water are used in a shower per minute?
Showering is one activity that occur every day apart from kitchen faucets to use dish washing. In a regular home, shower takes 3rd largest water consumption after toilets and Washing machines. An American uses 17.2 gallons /65 liter water in every shower with and average flow rate of 2 GPM. Yes that is a lot of water to heat on and needs a good conditioned tank less water heater to serve it hot.
How many gallons per minute do I need for a tankless water heater?
It is one the trickiest question and most important one for buying a tankless heater.
When you installed appliances they came with GPM ratings. If that information is lost; there are 4 ways to calculate GPM
1. You can visit websites and search your appliances model number find out the gpm,
2. You can manually calculate GPM- place a gallon jug under the appliance you want to calculate GPM for and track time. If 1 jug fills in 20 seconds that means it has 3GPM (20sec *3 gallon=60 sec),
3. Many company offers software to calculate your houses need.
4. Here is a standard chart that will help you to decide on GPM-
Simply multiply each consumption with the number of appliances you have at home, you will get a broad picture. This is the highest GPM of water at a time you may need, rarely it can happen if not never. However chance of 2 to 3 different appliance running at a time is more common.
What is the average gallon per minute for a well?
A water well is responsible for your home’s entire water supply according to The Water Well Board a good functioning water well will supply 600 gallons of water within a two hour period once in every day.
How many BTU's do I need for a tank less water heater?
High demand, water heater that will heat up more GPM will need more BTU. As a rule of thumb, if you subtract 1 GPM from the total GPM that will allow a 10-degree increase in water temperature.
BTU can range from 10,000 to 100,000 BTU depending on size. In same BTU capacity with more hot water GPM will go down like this chart. It may vary to some extent depending on different brands and their inherent additional features
Buying a Tankless water heater is no picnic, it is rather a wild life attainment for a day like Bear Grylls’s Man vs wild.The more you know about the pros and cons ,the detail you researched about your house’s need and match it with available brand the bigger your deciphering smile will be. So do your study and make it a decision you can be content with for next 15 year and more.