Making the Right Choice
Gas or Electric
Gas tankless water heaters are very efficient being much cheaper to run than their equivalent electrical model. However, they are invariably more expensive to purchase and a lot more expensive to install. The gas heaters are also limited to locations where the flue can be ducted to the outside of the house.
Electric heaters are much more easily installed, although a new fuse outlet with a higher wattage (much like an electric shower fuse) will be required to be fitted to the existing fuse box. A heavier cable must be run from there to the appliance location, by a professional electrician to building regulation specifications.
The water heaters in the above table have been selected from the criteria in order to find the top choices. Narrowing these down further, the author’s choices would include:
Electric Powered Heaters
1. Bosch RP17PT – Author has used Bosch products with great service for many years.
2. Rheem RTE18 electric heater – Good value for your money.
3. Stiebel Eltron – 3 years parts and labor warranty.
Gas Powered Heaters
1. Bosch Aqua Star 1600P - Once again the brand that has a very good service record, but this heater also represents very good value for the money.
2. Rinnai R75e - Very little to choose from between this and the following brand, except that the Rinnai has a slightly higher output than the Noritz one.
3. Noritz Model NR66-SV – As mentioned above, although slightly cheaper to purchase than the Rinnai. The Rinnai will give a better hot water flow due to the output.
Hot water requirements differ between houses and individual owners will have their own preferences of gas or electric powered heaters. The above comparison table and notes should help in deciding on the best rated tankless hot water heaters and choosing the right one to suit their individual needs.
Please remember that which ever model is chosen all six shown on the table are very efficient and will save on energy bills. They can also very likely entitle the buyer to Government Tax Credits but the local government offices should be consulted to confirm this.