  | Engineering Page:Engineering Page provides free online calculation and information services for engineers: pressure drop, line sizing, pumps, thermal rating, and much more. – http://www.engineeringpage.com |
  | Elite Software:Elite Software - 30 boiler computer programs programs for all aspects of hvac, plumbing and electrical System Design. – http://www.elitesoft.com/web/hvacr/elite_gasventw_info |
  | Taco Comfort Solutions:Taco is a manufacturer of hydronic systems and equipment for residential, light commercial, industrial and OEM markets. Site includes information for HVAC designers, engineers, plumbing contractors and consumers. – http://www.taco-hvac.com/products/design_tools/hydronic_system_solution |
  | HVAC Solution:Welcome to HVAC Solution - New HVAC Software Design for HVAC Equipment and Systems. – http://www.hvacsolution.com |
  | Danfoss:Service and Support | Downloads | Danfoss –https://www.danfoss.com/en/service-and-support/downloads |
  | FireCad:FireCAD Technologies | Boiler Calculations – https://firecad.net |
  | Watts Radiant:Watts Radiant has created RadiantWorks, a comprehensive heat loss calculation and design software package for radiant heat design projects. – http://www.wattsradiant.com/support/radiantworks |
  | Boiler Design Software:Software tool for boiler thermodynamic calculations, boiler sizing and boiler optimization. – http://boilerdesignsoftware.com |
  | Mecaflux:Software and calculation of diameters of flue of boilers and heating systems. – https://www.mecaflux.com/en/calculer%20conduit%20fumees |
  | Codeware:ASME VIII pressure vessel design software, ASME IX welding procedure, API 579 fitness-for-service software, TEMA UHX heat exchangers, piping, API 653 tanks. – https://www.codeware.com |
  | Carmel Software:Carmel Software offers more than 30 HVAC mobile apps, like load calculation, equipment location and duct sizing, for HVAC owners and technicians. – http://www.carmelsoft.com/Carmel_Software_Mobile_HVAC_Software |
  | Hurst Boiler:Hurst Boiler offers HVAC Solution software which is a dynamic interactive systems building software for HVAC systems design. – http://www.hurstboiler.com/boilers/boiler_auxiliary_equipment/hvac-software |
  | U.S. Dept. of Energy:Steam System ModelerTool | Boiler Calculator | U.S.D.O.E. – https://www4.eere.energy.gov/manufacturing/tech_deployment/amo_steam_tool/equipBoiler |
  | IAPMO:International Association of Plumbing and Mechanical Officials | The Hydronics Industry Alliance – Commercial (HIA-C) Building Efficiency System Tool™ | BEST Software – http://www.iapmo.org/hiac/building-owner/best-software |
  | Power Plant Simulator:Different Boiler Types - thermal calculation - recirculations - load calculations | Power Plant Simulator & Designer – http://www.powerplantsimulator.com |
  | Intertek:Boiler Integrity Management Software | Intertek.com – http://www.intertek.com/asset-integrity-management/software/boiler-management |
  | Appropriate Designs:Hydronics Design Studio Software | Appropriate Designs - The Specialists in Hydronic Comfort Heating – https://www.hydronicpros.com |
  | Hexagon PPM:Boiler Design and Analysis Software | Visual Vessel Design – http://www.coade.com/products/visual-vessel-design |
  | Avenir:LoopCAD – Radiant Heating Software | LoopCAD is the premiere software for the fast creation of professional quality circuit layout drawings for radiant heating systems including residential heating and cooling load calculations. – http://www.avenir-online.com/avenirweb/LoopCAD |
  | S.P. Thermal:Boiler Calculations for Steam, Hot Water and Thermal Loads | S.P. Thermal Systems provides boiler calculations, for steam boiler loads, boiler efficiency, hot water loads, thermal load, boiler operating cost. – http://www.spthermal.com/Boilercalulations |