Many homes have separate radiant (hydronic) heating systems and domestic hot water heaters. There may have been a good reason for this in the past. Prior to the wide availability of indirect water heaters, homeowners with radiant heat could either use a tankless coil system or they could use a traditional water heater. Tankless coils heat domestic hot water by passing the water through a coil inside the boiler. This has been a fairly standard water heating solution which eliminates the need to have a separate water heater.
Indirect water heaters were introduced nearly 25 years ago in North America. They heat domestic hot water with the boiler system water, eliminating the need for a separate heat source. As boilers have become smaller, tankless coils were not practical for modern boilers and indirect water heaters became more popular.
If your home has radiant heat, and you are looking for a replacement traditional gas, oil, or electric water heater, it may make sense to replace it with an indirect water heater like the Smart Series models from Triangle Tube. The Smart Indirect Water Heaters use a unique tank-in-tank design that reduces standby heat loss to less than 1 degree F per hour. The Smart Series stainless steel design is robust enough to last a lifetime. In fact it is backed by a limited lifetime warranty.
Smart Indirect Water Heaters are a green alternative to traditional or tankless water heaters. They can be used with traditional or high efficiency boilers which operate on oil, natural gas, or propane. In addition there are multi-energy models to work with solar water heater systems.