InterNachi HVAC Material | 137 Questions with 100% Correct Answers | Updated & Verified

A heat source capable of maintaining at least __________ should serve every habitable space in houses in almost all regions. - 68F Burning natural gas creates _______________. - Water vapor and carbon dioxide Burning natural gas with Oxygen yields CO2, water vapor and _______. - Heat As hot gases cool, they release a lot of heat energy as the change their state from __________. - Gas to a liquid If combustion air is inadequately supplied to a gas furnace, ___________ will be produced. - Carbon Monoxide * You must add enough O2 to the Reaction to get CO2 in its products. ____________ is what carries the heat from the source to the enclosure being heated - Heat conveying medium You may be able to describe a heating system by its _________. - Heat conveying medium