Boilers and Water Heaters

IRC 2024 Boiler Installation Requirements: ASME Stamping, Clearances, and Safety Controls

What does IRC 2024 require for residential boiler installation, including ASME stamping, clearances, operating controls, and mounting?

M2001

IRC 2024 Boiler Pressure Relief Valve Requirements: 30 PSI, Discharge Piping, and ASME Stamping

What does IRC 2024 require for a pressure relief valve on a residential hot water boiler, including discharge piping, shutoff prohibition, and testing?

M2002

IRC 2024 Expansion Tank Requirements for Hydronic Boiler Systems

What does IRC 2024 require for expansion tanks on closed-loop hydronic heating systems, including type, pre-charge pressure, and location?

M2003

IRC 2024 Hydronic Expansion Tank Sizing: Formulas, Bladder vs. Steel, and When to Add a Second Tank

How do you size a hydronic expansion tank under IRC 2024, including the acceptance factor formula, bladder vs. compression tank differences, and when a second tank is needed?

M2003

IRC 2024 Hydronic Heating Controls: Aquastat, Zone Valves, and Outdoor Reset Requirements

What does IRC 2024 require for hydronic system controls including aquastat, zone valves, circulator relays, and outdoor reset control on larger boilers?

M2004

IRC 2024 Water Heater vs. Boiler: Code Classifications, Combi-Systems, and Dual-Use Concerns

What is the difference between a water heater and a boiler under IRC 2024, and how are combi-boilers that provide both domestic hot water and space heating classified and regulated?

M2001