Heat exchanger
Definition to come.
Where it comes up
- Gas furnaces
How a gas furnace heats, what AFUE means and the signs worth a closer look
- Gas water heaters
Gas water heater types, burning air, venting and the signs of backdrafting
- Before the heating season
The fall check-up, the filter and humidifier, alarms, vents, boilers and heat pumps
- What you notice and what it can mean
No heat, short cycling, noises, smells, water, ice and high bills, and what they can mean
- Natural gas safety
The added smell, gas detectors, your gas pipes and yearly appliance checks
- Warning signs
Signs a system may be unsafe, and when to stop and have it checked