If your furnace draws combustion air from inside the house you are using air that you have already heated.
Ducted attic gas furnace make more efficient.
There are rarely instances when we will advise against an attic installation.
90 of the attic would get the insulation benefits of the spray foam and then there s other options to help with the new furnace closet in the attic.
In it the authors argue that attic ducts kill home efficiency they say that studies show a 20 percent energy use increase for homes with attic ducted units.
The trick to the installation of a gas furnace in an attic space is routing the condensate drain from the attic down through the core of the house to the basement.
Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.
5 steps to improving your furnace efficiency.
This process is the only way that you can create a thermal envelope that can provide a comfortable indoor environment throughout the year.
High efficiency furnaces offer 90 or more afue.
Hvac system problems can go undetected.
High efficiency furnaces aren t usually recommended for an attic.
If someone was going to seal the attic then it would make much more sense to build a closet around the furnace that gives adequate ventilation to the outside.
It is much more efficient to use outside air for combustion air.
The higher cost of a more efficient gas system will most often be offset by lower fuel costs in regions with harsh winters.
As we get deeper into winter the cold weather means an increased use of your furnace.
If turning on your furnace makes you cringe in anticipation of high energy bills use these five steps to help you save money and increase your furnace efficiency.
Ideally i would want higher because i know that hspf usually drops as temperature drops.
So a 95 furnace is more efficient than an 80.
Higher efficiency can be gained in a gas furnace with an alternative to the traditional pilot light such as an intermittent direct spark or hot surface ignition.
These days 95 afue is a common rating among new gas powered furnaces.
That air is replaced by cold outside air that will then need to be heated.
Check replace your furnace filter.
In this type of furnace 20 of the energy produced by natural gas is expelled as exhaust.
A standard efficiency furnace provides 80 annual fuel utilization efficiency afue.
There is a common misconception that this is not possible for high efficiency furnaces.
You must have more holes creating in your ceiling to install the duct work and move the hot air through your home if you opt for a furnace in the attic.