10 Best Combi Boiler of September 2025

Best Combi Boiler Reviews & Buying Guide Of 2021 In Canada

In case one has a small or medium-sized home, cannot accommodate an additional water storage system and needs a good quality boiler, then these combi boilers are the best choice! The combi boilers act as both water heaters and central heating boilers, which proves their versatility. When one opens the tap of any room in the entire building, the combi boiler will heat the water directly from the mains and supply it forward. Like heat exchangers, various other factors play a significant role in judging the heated water's direction. In this buying guide, electric combi boilers types and factors are addressed to better understand before making the first purchase.

What are the different types of combi boilers?

The combi boilers can be classified into four major categories according to the fuel type. Let's check them out.

Gas combi boilers

In this type of combi boiler, the gas is usually supplied from the mains directly into the boiler. The boiler then burns the gas to make hot jets heated up on the heat exchanger and heat the water. These are one of the cheapest options available and are widely used.

Electric combi heaters

In the electric combi boiler type, the electricity is used to heat the boiler elements instead of fuel or gas. This requires no main gas supply and is much quieter than the other gas boiler types.

Oil combi boilers

A continuous supply of oil usually powers the combi oil boilers. One should store the oil tank somewhere near the appliance for better efficiency. These are excellent for houses that do not have direct access to the main grid or the gas.

LPG Combi boilers

These combi boilers require a fuel supply, which is mostly LPG (Liquid propane gas). These are mostly seen at caravans with small portable LPG gas cylinders. These propane combi boilers have a far lower carbon emission than oil, which is great for the environment.

Factors to consider before buying a combi boiler are:

Heat Exchanger Plate

Most of these combi boiler systems of the best brands like Bosch, Vaillant, Glow-worm and other brands have a high-grade NSF certified brazed plate heat exchanger. This is made of stainless steel and has the best efficiency and durability out of all the alternatives.

Maximum Output

The output of these combi boilers is highly variable and depends on the combi boiler type and brands. Most of them usually are 30kw combi boiler, 40kw combi boiler, 24 kW combi boiler and others, which is quite an optimum count as a combi boiler.

Price

The best budget combi boilers are priced in the range of Can$150 to Can$6000, which can be chosen as per the required specifications.

Warranty

Sudden problems with the eating process, in general, can be fixed easily. Most brands like Bosch, Vaillant, and others offer a brand warranty of one year to five years to complete these combi oil boilers' complete safety.

Final Thoughts

There are countless benefits of the combi boilers like easier installation, compact, lightweight anymore. These do not even require a humongous pipe framework and great for small homes. Check out the top 10 best combi boilers in the list given above to get the best product.