Skip to content
Close (esc)

From Cold Starts to Cozy Rides

Buy It Now

How to choose the best diesel water heater

A diesel water heater warms water from the vehicle's supply to give high-temperature water to the heat exchanger where it scatters heat that is then dispersed to the outside climate. 



The high-temperature water likewise streams to the motor and warms it to stall the effects of a cold environment. Choosing the best diesel water heater for your vessel can be a daunting task. In this article, we will go through all you need to look for in your next water heater.

How to choose the best heater for your vessel

Choosing the best water heater can be an important decision if you’re looking for a great return on investment over a long period. So what should you look out for in a diesel water heater?

  1. Functionality & Design
  2. Easy to use
  3. Availability
  4. Cost
  5. Efficiency
  6. Heat Generation
  7. Size & Weight
  8. Durability
  9. Low Noise Operation
  10. Other criteria(in-built accessories/portability/quality raw materials)
  11. Quality and Safety

Selecting the best diesel heater can be a bit difficult as there are several things to consider, but once you know the way, it will be as easy as water.

Functionality & Design

All heaters are basically designed to heat. But, the things to consider are the durability and specifications of the design. Choose the best heater which is designed to last long without any failures.



There are specialized design and functionality implementations for which a heater performs at a low noise level. For example, in the D1250A/D1250B diesel hot water heater, there is an exhaust pipe that works with an exhaust muffler to minimize the heater’s noise.

Easy to use


Make sure your heater is easy to install and use. Great heaters have the best installation kit and have manuals for the users to operate the heater. The best heaters are also smart to use. There are temperature sensors for you to monitor the temperature for overheating. There are also automatic timers by which you can preheat your vessels. 



Availability of the fuel and parts of a diesel water heater is a key factor. If you choose a diesel water heater, make sure different parts of it are readily available in the local market. If some parts of your heater have problems, you might want to change parts rather than buying a new heater. Different parts of a diesel heater are readily available in the market. 


Cost is another key factor for choosing a diesel water heater. While there are many cheap options in the market, a low-quality heater will cause problems and waste a lot of time. Go for the best possible quality within your budget and set your mind at ease.

Buying price and maintenance costs should be considered. You might not want to spend more money on maintaining a heater. 

There are a lot of heaters in the market that comply with a low cost. For example- the Diesel hot water system - S1250 model. The circulation system of the mentioned model is maintenance-free, which is great.

The S1250 model has a large inventory of spare parts available for easy repairs. Overall, a cost-efficient diesel water heater can prove to be a key factor in choosing a heater.


Efficiency means a lot for water heaters. For choosing an efficient heater, the following things can be considered:

  1. Output Power
  2. Electrical Consumption
  3. Fuel Consumption
  4. Time for hot water delivery
  5. Voltage rating

Output Power

Output power is the heat generation of a heater.  Usually, 5KW output power is good enough to heat the water in a heater. So while choosing, keep this factor in mind.

Electrical Consumption

Less electrical consumption means fewer costs to run a heater. Electrical consumption of less than or equal to 3.2 Amps at 12 V is good enough for a heater to be efficient. 

Fuel Consumption

Although Diesel is a cheap fuel, it is required to look at the consumption rate. Monitoring this information makes certain to assist you with choosing the one that turns out best for your needs just as doesn't devour a lot for its voltage.



Less fuel required to heat more water is a great factor to choose heaters. When you buy a heater, make sure you check out the fuel consumption rate. Usually, fuel consumption at less than or equal to 0.52 Qt/H is good enough.

Voltage Rating

Do not go for a high or too low voltage rating. For example, a low voltage rating with a high voltage power source can lead to overheating of a heater. Choose wisely. Usually, a rated voltage around 9V-16V is fine.

Time for Water delivery

The time factor for getting required water delivery is a key factor. You might not want to wait a long period of time to get hot water. Choose the best heater model that is designed to give fast hot water delivery. Diesel Hot Water Heater model D1250A/D1250B is specifically designed for fast water delivery.

Heat Generation

You’re buying a water heater for obvious reasons, to get an easy supply of hot water. Make sure that your choice of heater generates an ample amount of heat, so it runs properly. Usually, heaters with an output heat of 16000BTU are the best. 

Size & Weight

Choosing heater size should be considered while buying. To properly locate a heater in your home/ship/car space, size is a key factor. There are different sizes available in the market. Choose the best fit for your space.

Usually, a heater with an output of 16000 BTU is relatively small and therefore has more versatility.



Weight is another factor. Usually, a heater of 7-8 kg weight is a great measure. A good combination of size and weight can lead to easy portability of a heater.


The durability of a heater is a must consider factor. Durability depends on the quality of the housing material of a heater. Heaters made with aluminium and nylon are the best. Heaters with housing material of stainless steel are also good. The fuel pump of a diesel heater is an important component that contributes to the better longevity of the heater. Overall, make sure the diesel heater you’re buying is made with top quality materials and anti-corrosion. 

Low Noise Operation

While meeting the demand for hot water by choosing a diesel water heater, you don’t want to have noise concerns. When a heater is running, noise reduction factor should be considered.

There are brushless motors in D1250A/D1250B model, which contributes to low noise operation, long lifespan and low power consumption. There are a lot of heaters in the market, which are specifically designed to operate at low noise levels. 


Other criteria(in-built accessories/portability/raw materials)

Heaters made up of quality materials are always preferred. The best heaters are industrially certified because of the quality of the materials used. For example- D1250A/D1250B diesel water heater model is CE, RoHS, and FCC compliant and comes with the complete installation kit. 



There are several parts of a water heater that contribute to better performance. For example- a heater case is used to protect the internal components of a heater from foreign material. A heater case should be heat and corrosion-resistant. 

The portability of heaters is another factor to consider while buying. Heaters with less weight and standard size are more portable.

Overall, consider the diesel heaters with the best of specifications and in-built accessories.  You might want to choose according to your own preferences. For example- if you’re concerned about the running costs; Buy those heaters which have less power rating in watts. The less the rating, the less is the cost.

Quality & Safety

While there are some risks in running a diesel heater, if chosen properly, those can be avoided. Diesel is a combustible fuel. So, choose the heaters that are industrially certified and are made with quality materials. Make sure your choice of heater doesn’t leak fuel, so you stay safe.



Once again, the best heaters are those which are CE, RoHS, and FCC compliant. Make sure your heater comes with a warranty. That way if you run into any trouble you can always contact your vendor for support.


Diesel water heaters are useful devices that come with more than one benefit. You can choose the best heaters for you by matching its specs, with the cost, and most importantly, your own specific needs.


To summarize, the key factors to consider while choosing a diesel heater are- quality, safety, cost, portability, maintenance, the difficulty of installation and efficiency.  

Older Post
Newer Post

1 comment

  • I appreciate your clear explanations and the emphasis on safety throughout the process.
    It’s evident that you care about your readers’ well-being and want us to tackle these issues safely and effectively.
    Your blog has become my go-to resource for appliance-related issues,
    and I’ll be sure to share it with friends and family who might face similar problems with their appliances.
    Keep up the fantastic work!


Leave a comment

Back to top

Shopping Cart

Your cart is currently empty

Shop now