Frequently Asked Questions

  • What is the rating on an Indirect Water Heater? (Energy Rebates)    Answer:  You would put N/A  our units work off your furnace or boiler.
  • Do I have to mail my Product Registration Card or can I scan and email to Heat-flo?     Answer:  You can either mail, scan and email to or you can register online at
  • How do I find a distributor in my area?     Answer:  Contact your local sales representative. Visit our website for a list of local area coverage.
  • I am a homeowner, can I purchase direct from Heat-flo?     Answer:  Heat-flo does not sell direct. Contractors can contact there local Heat-flo wholesaler.
  • What is the maximum temperature for my Indirect Water Heater? What is the recommended temperature?     Answer:  The maximum temperature is 150 degrees. The recommended and factory set temperature is 120 degree 
  • How do I become a distributor of Heat-flo products?     Answer:  Contact
  • How do I purchase a replacement anode rod?     Answer:  Contractors can contact local Heat-flo wholesaler.
  • What does a Heat-Flo unit use for a heat source?     Answer:  An Indirect Water Heater uses a furnace or boiler. The Storage tank uses a domestic water heating unit such as an on demand type heater or combination boiler.
  • Can I register my unit online?     Answer:  Yes, go to
  • Why am I getting brown/rusty water from the hot water only?     Answer:  This is an indication that the anode rod in the unit has been completely consumed.
  • Can a unit be laid down to ship to ender user location?     Answer:  No, it is not recommended.
  • Can a unit be installed diagonally instead of vertically for tight space installations?     Answer:  No, the unit would not work properly. This would cause the unit to constantly call for heat. Scald issues would occur.
  • What size expansion tank would my installation require?     Answer:  The potable expansion tank size is determined by the volume of hot domestic water in the system.
  • Are Heat-flo units glass lined or solid stainless steel?     Answer:  All stainless steel construction.
  • Who can I contact for Tech support, Customization, Sizing, Banking multiple units together, etc...?     Answer:  Contact us at 508-278-2400 or email You can also contact your local sales representative.
  • Does my unit have an anode rod? If so, what type?     Answer:  Heat-flo units have been manufactured with a sacrificial magnesium anode rods since approximately September of 2014.
  • What parts of the country do you ship to?     Answer:  We ship to the 48 contiguous states, Alaska and Canada.
  • Where is serial number located?     Answer:  On the rating plate located above the drain valve.
  • If I have a well can we install a Heat-Flo unit?     Answer:  The all stainless steel construction of the Heat-flo tank is well water friendly.
  • Can my unit be installed outside?     Answer:  NO.
  • Can I make my own modifications?     Answer:  NO.
  • Can I use my wood stove as a heat source for my unit?     Answer:  YES, providing that the water temperatures are properly controlled.
  • I am not a contractor, can I install unit myself?     Answer:   NO
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