HTP Honeywell Boiler Overview

The Munchkin Honeywell series gas boiler was manufactured by the company Heat Transfer Products (HTP) until 2002. Munchkin boilers occupy a small amount of wall or floor space, and are billed by HTP as “the original high efficiency low mass boiler produced in the United States.” Munchkin Honeywell series boilers were commercial boilers and carried the following model numbers: T50M, T80M, 80M, 140M, 199M and 399M.

The 399M model Munchkin boiler boasts a 93-percent AFUE rating. The unit is constructed of stainless steel, and is reportedly so lightweight it can be installed by one professional. The Munchkin boiler digitally monitors its own operation for efficiency purposes. Honeywell is an original equipment manufacturer for Munchkin boilers, producing such parts as gas valves and heating controls.