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1. #Tankless water heater for radiant heating upgrade#
2. #Tankless water heater for radiant heating code#
3. #Tankless water heater for radiant heating plus#

#Tankless water heater for radiant heating code#

California Code requires a minimum 80% efficiency rating on all boilers produced. Many different options exist today for their replacement. Many older boilers still in service were fairly efficient in their best day, but have reduced operational efficiency from the years of service. For a standard boiler replacement, our customers have experienced a 35-45% savings off their monthly heating bill, with some cases being as high as 50% or more. Modern technology and boiler design have advanced boilers in safety and efficiency. Chances are if the boiler is 25-50 years old, its replacement could be a practical move. Sometimes a simple cleaning can restore lost performance of a boiler system without having to replace it. The question should be answered after performing a thorough evaluation of your existing boilers condition. Should I replace my existing boiler with a more efficient unit? It is important to have a high efficiency insulated tank for water storage so standby loss is minimized. The radiant panel demands will pull water directly from the storage tank instead of from the boiler. Also, storage tank systems which store water at a desired set temperature act as a “buffer” between larger boilers and smaller zoned systems. Nowadays for multi-zoned systems, we employ multi-staged gas valves, thermostatic modulation valves, or outdoor reset controls which vary the boilers output capacity according to current demands.

#Tankless water heater for radiant heating plus#

This allows the boiler the thermal pick-up during system start-up plus assures system performance during cold spells and minor boiler efficiency loss over the years.

#Tankless water heater for radiant heating upgrade#

When we size a boiler, we look at the requirements for the system input and depending on the mass of the concrete slab to be heated, we upgrade the output 20-30% over what’s required. Over-sizing a boiler will lead to boiler short cycling, additional wear and tear on support equipment, and reduce efficiency. Although a boiler “under load” is more efficient than one turning on and off, if it can’t raise the supply water output temperature to the preferred optimum design range then the house will not heat in a timely manner. Under-sizing a boiler will lead to unsatisfactory heating and cause the unit to run continuously. It is important not to undersize or oversize a boiler. Simple heat loss calculations will provide an ideal input size. The size of the boiler depends on the output required to offset the heat loss of the structure according to specific climates and weather conditions. What size boiler do I need for my radiant heating system? Some water heaters can be used for small radiant heating applications. Hydronic boilers are designed for the application where most water heaters are not. Typically less storage means less standby loss and high output means faster temperature generation.

Cast iron boilers usually hold more water, between 5-20 gallons total. A typical residential copper or stainless steel boiler will hold 1-3 gallons of water and output 100,000-225,000 BTU. A typical residential water heater holds 40 gallons of water and has an output rating of approximately 40,000 BTU.

Different from a domestic water heater, it has relays, transformers, aqua-stats, gas ignition systems, safety controls and is designed to accommodate increased output and flow rates often required by radiant panel systems. The most common heat source is a hydronic boiler. What is the most common heat source for a radiant heating system?