HTP Munchkin R2 (Revision 2) Boilers

HTP Munchkin R2 Boiler Overview

The Heat Transfer Products Munchkin R2 (Revision 2) is a discontinued modulating condensing boiler with an efficiency of 95.1% AFUE. The Munchkin R2 boiler replaced HTP’s R1 boiler, and changes in the unit included extra latches on the cover, adjustable feet, a condensation vent on the left side of the unit, and a straight air channel on the burner. It also featured extra wires for better compatibility with HTP’s Vision III boiler management controller, which provides system monitoring and can communicate with one to eight modulating Munchkin boilers. The Munchkin R2 series is a later revision of the HTP Munchkin boiler series.

Questions about this model?

Consumer Reviews of HTP Munchkin R2


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #5 of 12 HTP Boiler
  • 25% of customers recommended

Read Reviews of Other HTP Products

Find ratings and reviews for HTP Boilers, Furnaces and more

Read Reviews

Top 10 Boilers

See who made our list of the best Boilers of 2023.

See the Top Products

Find a Certified Heating & Cooling Professional In Your Area

Contact a top-rated local expert to help with all of your home's HVAC needs.

HTP Munchkin R2 Boiler Reviews

"Heat exchanger"

1.0 rating
Very Unsatisfied

I was the second owner and the boiler was only 10 years old. The heat exchanger failed. I had the boiler serviced annually from the start and from the original installer. I was told "tough luck, Charlie" and this was the standard. I owned a furnace in the past and that warranty transferred, what the heck? I am out 6k. Thank you very little, oh and merry Christmas (not).

Chris Kelly

Hudson, WI


1.0 rating
Very Unsatisfied

Four years old and it had to be removed and replaced with a new and different unit.

J berm

Findlay, OH

"Junk in any language"

1.0 rating
Very Unsatisfied

In my opinion: overpriced, overrated, unreliable piece of junk manufactured by a company that provides no support other than to take more money from its customers to replace the product with another piece of junk. What a frickin' waste of money and what a horrible experience dealing with Heat Transfer Products (HTP). I will certainly avoid their other products, such as the Elite boiler, SuperStor Ultra water heater, Elite FT boiler, Phoenix water heater (this bird ain't coming back from the dead), Pioneer and MC series. If I sound upset it's because I am. HTP gives a bad name to High Efficiency. I will never buy any HTP product ever. I like nothing about the product. I dislike everything about it.


Albany, NY

"Rock Solid (if you take proper care)"

5.0 rating
Very Satisfied

Installed myself: 8yrs of flawless operation… Here's the key: the vent needs to be correct distance (otherwise the unit sucks up combustion). The heat exchanger needs to be cleaned (I use a depth gauge to clean out the crud). Flush the combustion chamber with water to clean out. Clean the controller circuit board with compressed air to prevent shorts from dust. I perform this service myself every other year in ~30min. Less effort than car maintenance.

Sprog Archer

Boston, MA

Munchkin R2 (Revision 2) Warranty

The warranty for the Heat Transfer Products Munchkin R2 (Revision 2) boiler is comprised of the following:

  • Complete 1-year warranty on defective parts
  • Limited 3-year blower motor warranty
  • 12-year heat exchanger warranty, pro-rated after the 7th year

HVAC Brands

Learn more about your home's heating and cooling system with our guides, how-to's, FAQ's, tips and more.

Ready to get a quote from an HVAC contractor?

Let us know what type of service you need and we can connect you with a certified local HVAC contractor.

Please enter a valid name

Please enter a valid phone number

Please enter a valid zip code

There are no dealers in this zip code.

Please enter a valid email address

Please select repair or replace

Please select heating, cooling or both