Frequently Asked Questions

What is the rating on an Indirect Water Heater? (Energy Rebates)    Answer:  You would put "not applicable" (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 on our website.

How do I find a distributor in my area?     Answer:  Contact your local sales representative. Go to "Rep Locator" on 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, listed on our website.

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 end 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 the 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

Why do I get an occasional spurt of air from my hot water faucet?      Answer:  Your Heat-Flo tank is equipped with a sacrificial anode rod, which deteriorates slowly over time, during which small gas bubbles form on the surface of the anode and release at a nearly imperceivable rate.  If you have soft water, or a water softening system, the anode rod will deteriorate at a much higher rate, causing greater out-gassing. If the tank is idle for a long period, the gas will collect at a high point in the system, typically the faucet. Work with your water quality specialist to adjust the softness to an acceptable level. 

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