Honeywell does not produce any gas furnaces as of 2015. Gas furnaces can normally range quite widely in price, depending on the size, make and model of the unit.
Out of more than 60 different gas furnaces listed on The Home Depot website, the prices range from around $600 to over $2,600. In most cases, the cheaper the price of the furnace is, the less heat it is able to output. On the other hand, some of the more expensive models have an output of 100,000 Btu's or more. However, this is not always the case, as some 72,000 Btu units sell for around the same price as a 32,000 Btu unit from another manufacturer.
Although Honeywell does not produce gas furnaces, the company does produce numerous models of thermostats that are designed to be used in conjunction with gas furnaces. In addition, they also manufacture a range of different portable heaters. The majority of the Honeywell portable heaters typically sell for less than $100, with several of the smaller units even selling for less than $40. The Honeywell digital infrared portable heater with Quartz heat technology is the only heater listed on the Honeywell website that sells for more than $100, as this unit typically has a price of around $160.