Tankless water heaters and indirect water heaters use a heating system to heat the water. They are part of a so-called integrated or combined water and heating system.
How they work
The tankless instantaneous water heater provides hot water without a tank if required. When the hot water faucet is open, the water is heated as it flows through the heating coil or heat exchanger installed in the main stove or boiler. Tankless water heaters are more efficient in cold weather if the heating system is used regularly, but can be an inefficient choice for many households, especially those with hot climates.
Indirect water heaters require a storage tank but are a more efficient option for most households. The indirect water heater uses the main boiler or boiler to heat the liquid flowing through the heat exchanger in the storage tank. The energy stored in the water tank reduces the frequency of switching on and off the stove and saves energy. Indirect water heaters are the cheapest way to provide hot water when used with high-performance boilers and well-insulated tanks, especially when the brine boiler is set to ‘cold start’.
Indirect systems can be burned using gas, oil, propane, electricity, solar power, or any combination of these. Tankless systems typically run on electricity, oil, or gas. These hot water systems work with compressed air systems and hot water or underfloor heating systems.
Selecting a Combination Water and Space Heating System
Integrated or combined water and space heating systems are generally more expensive than separate water heaters and stoves or boilers, but installation and maintenance costs can be lower. For example, you don’t need multiple power connections because you only have one heat source. In addition, there are not a lot of moving parts to maintain or maintain. Some of these highly efficient systems can reduce operating costs.
Most combined water and heating systems are typically designed for new construction. However, there are modified units available that can work with existing water dispensers.
When choosing a system, you need to consider its size. The combination of system dimensions requires different calculations from the sizing of individual hot water or heating systems. It is better to entrust it to a qualified pipe and heater.
To determine the energy efficiency of a combined water and heating system, use the Combined Equipment Energy Efficiency Rating (CAE). The higher the number, the more energy-efficient it is. The effectiveness of combined devices varies between 0.59 and 0.90.
System installation and maintenance
Proper installation and maintenance of a combined water and heating system can optimize energy efficiency.
Correct installation of the system depends on many factors. These factors include fuel type, climate, local building standard requirements, and safety aspects. So it is better to install a qualified pipe and heater. When choosing a contractor, do the following:
- Request cost estimate in writing
- Request reference material
- Check with your local Better Business Office about your business
- Make sure the business gets local approval if needed, and understand local building codes and more.
Regular system maintenance can dramatically extend the life of the water heater and minimize loss of efficiency. Please contact the installer and read the instruction manual for specific maintenance recommendations.
Improved energy efficiency
After properly installing and maintaining the combined system, try other energy-saving strategies for tankless coil and indirect water heaters supply, heating, and cooling to reduce operating costs.