A Guide To The Best Tankless Water Heater For A Small House

Most of us have found ourselves living in smaller houses or apartments due to the ever increasing population and cost of livelihood. A tiny house can rob us of some luxuries such as hot water due to the large space the traditional water heaters- which carries between 100 to 250 liters- occupy. However, this is slowly becoming a thing of the past with the demand-type or tankless water heaters. As the name suggests the demand-type water heaters has of late taken the market by storm.

What gives them an edge over the storage-tank ones? First, with their relatively small sizes they occupy very little space. They can be mounted on the wall over your tub, under the sink or in the closet. You can also have them installed outside the house. It further saves a lot of energy, sometimes up to half, because with it your water gets heated automatically when you turn it on.

Another merit of the tankless water heaters is their long lifespan. This may well cater for the initial installation cost because you can stay with one for more than two decades. Since they do not store water they are less of a risk. Traditional tanks on the other have been known to have burst due to rust or pressure and the spillage can cost you money and valuables.

But how to choose among so many types and brands? Of course there are some professional reviews sites as Heaters Forlife, but here, you can also get basic knowledge through this post.

The demand-type hot water system is also instantaneous since it heats water as it passes through. Therefore, the days you stood there waiting for water to come will be long gone.

best tankless water heater for tiny house

Here are some suggestions for getting the best tankless water heater for tiny house.


The size of a tankless water heater will be determined by the highest temperature you require at a certain flow rate. You can have a contractor determine this for you. You will also have to put into consideration the number of outlets you will connect to one tank.

Knowing the number of outlets helps you calculate the output that they will be producing at any single time, say 4 gallons. This is by for example adding the sink outlet and the bathroom outlet rate of flow when ran simultaneously. The temperature rise for most home uses ranges from about 39 to 50 degrees (Celsius).

From here you can choose to install the electric heated one if your flow rate is below 2 gallons. The gas-heated tankless heater on the other hand can handle up to a 5-gallon flow rate.

However, you can also have several small demand-type heaters installed at various vantage points for example one for the shower and another for the kitchen.

Fuel types and availability

This is very crucial when selecting a tankless water systems for small apartments. You have to know the type of fuel the tank uses, how often it is available and if it is sustainable. Demand-type water heaters use electricity or propane both of which are readily available in most if not all parts.

As mentioned above the propane-fired tankless water heater’s rate of flow is larger in volume when compared to the electric one. However, it can waste a lot of energy and will cost more if the pilot light is continuously burning.


You also need to calculate the overall rate you will encounter with various sizes, models and from the fuel you will be using. You can familiarize yourself with the going rates of electricity or gas in your area and then calculate the cost by checking the heater’s energy factor (EF).

You can further add the initial cost of installation in your total calculation. However, when you compare the tankless system’s cost with other types of water heaters you will notice its efficiency and cost-effectiveness.


Having your tankless water heater installed properly can go a long way in ensuring less energy is wasted. Many factors have to be put into consideration such as the type of fuel you will use, municipal regulations, the climate, building regulations and above all your predilections. For camping water heater, of course the installation method and place depend on using places.

If you believe in your dexterity you can call the manufacturer for the manual and instructions on how to go about it. However, it is always prudent to have a reputable and certified company do it for you. This is especially advisable so as to avoid future unwarranted maintenance costs or accidents.

You can get the best tankless water heater for tiny houses by contacting a reliable supplier. By checking other customers’ reviews and their customer service you can always know the best supplier. Apart from knowing the aforementioned factors on how to choose the best, the company should be able to give you any extra information and the estimated cost of connection and maintenance.