Any gas appliance such as a water heater or furnace needs to transport the combustion gases safely out of the indoors environment. In order to make a vent, one of three types of pipe are typically used, Triple Wall, also called chimney pipe, Double Wall or Single Wall.

Triple Wall pipe, used mostly for chimneys, has an inner stainless steel liner and two outer liner walls made of either stainless or galvanized steel. It is almost never used for gas fired venting, being considered too expensive, and is reserved for coal, wood or oil burning appliances. However, it can act as a substitute for Type B (Double Wall) pipe if required.

There are many types, brands and models of heat pumps, and a wide range of problems that can happen. There are, however, some common problems that are seen.

Before going further, check a few basics. Check the main power switch on the heat pump, just in case. Turn both switches on if it is a remote system.

For heating, make sure that the thermostat is set higher than the ambient temperature in the room, and that the selector is set to “heat”.

On hot summer days, the air in an uninsulated attic can heat up to 130 to 150 degrees Fahrenheit. Sure, you could just stay out of the attic on warm days, but the problem is the heat built up in the attic will seep down through gaps in the ceiling and make the rest of the house hotter as well.

Not only does the increased heat make your home stuffy and uncomfortable, it also makes your air conditioner work harder and raises your summer energy bills. An attic ventilating fan can significantly help to alleviate this problem.

Fans are mechanical devices designed to move air, both as stand-alone units and as installed in heating, ventilating and air conditioning systems. They move the air in terms of both circulation (which is concerned with the velocity that air is moved in a confined space) and ventilation (which is concerned with the volume of air moved).

Air is made up of water vapor combined with dry air in a way that preserves each component’s properties. Humidity is defined in a general way as the water vapor content of air. In heating, ventilation and air conditioning (HVAC), more precise terms are used; specific humidity, absolute humidity, and relative humidity.