Can I Use a Water Heater as a Water Storage Tank in a Boiler Radiant Heat System?
When considering the integration of a water heater as a water storage tank in a boiler radiant heat system, it is crucial to understand the benefits, limitations, and implications of such a setup. This article will explore this topic in detail, including the scenarios in which a water heater can be used and whether it is advisable to do so.
Introduction to the Boiler Radiant Heat System
A boiler radiant heat system is a closed-loop system that consists of a boiler, a circulating pump, and oftentimes an expansion tank. This system does not require a dedicated storage tank, as it is designed to maintain a consistent flow of heated water through the radiators or tubes, providing efficient heating to the building.
Using a Water Heater as a Storage Tank
While it is possible to use a water heater as a storage tank, it is not the ideal configuration for a boiler radiant heat system. The primary function of a water heater is to heat the water, which can be inefficient if that water is also serving as a storage tank. This setup could potentially reduce the overall efficiency of the system, leading to higher energy consumption and increased costs.
However, if you are careful about how you configure the system, it is possible to use a water heater. You would need to insulate the water heater to minimize heat loss and make sure the system is properly balanced and functioning as intended. Some users have suggested adding an insulating blanket or even stuffing insulation in the bottom of a gas-type water heater, but this is not recommended unless the water heater is not connected to the system.
Why Use a Storage Tank in a Radiant Heat System?
While a closed-loop radiant heat system does not inherently require a storage tank, there are scenarios where a storage tank might be necessary. For instance:
Hot Water Supply: A separate storage tank can provide hot water for domestic use, ensuring that the radiant heat system remains optimized for heating purposes.
Expansion and Pressure Stabilization: An expansion tank is often a separate component used to manage water expansion and pressure fluctuations within the closed loop. This is typically a smaller, dedicated tank designed for that specific purpose.
Using a water heater as a storage tank is generally not advisable because it can interfere with the efficiency and performance of the boiler and circulatory pump, leading to suboptimal heating and increased energy consumption.
Conclusion
To summarize, in a boiler radiant heat system, it is not beneficial to use a water heater as a storage tank. This can reduce the efficiency of the system and lead to higher energy costs. However, if you are experiencing issues with hot water supply or pressure management, consider using a dedicated storage tank for these purposes, while maintaining the primary function of the boiler and circulating pump.