the heating run to our addion is poor. How can I get the heat to the areas. My Toilet froze!48 degrees tops?

Question

6" duct runs under crawlspace for about 25ft. 2 runs.

Answer 1

trace the duct work back to the furnace and check to see if there is a shut off on the duct work. The ducting may have a baffle in it to regulate flow. If you're not gettting alot of air out of your new ducts this could be the problem.

Answer 2

One must operate under a series of guesses here so let me get started. You had a new addition added to your home. The contractor tied into your existing forced air heating system (no radiators) and now the heat is inadequate.
First question that comes to mind is if the existing heating system is sized to accept the additional 50' of duct run.... (I will not even get into the multipliers that need to be calculated if it was done out of flex duct but 12':1' and you can see where it can defeat the blower motor quickly). It is possible to get a larger volume air mover in some circumstances. consult your HVAC man.
Second... How leaky is your duct system. Are all joints sealed using mastic? Testing of typical duct systems show that a large percentage of installed systems lose over 50% of there capability due to poor seals and inadvertent leakage.
Now third would be to insure that the ducts traveling through the crawlspace are fully insulated. this will help to insure that the heat makes it to your desired location.
These are all very generic recommendations but for specifics I recommend a HAVC agency that can do out a Test using a "DuctBlaster" which is basically a small test fan that can measure the output flows through your ducts. Also verifying the proper sizing of your heating system to the distribution system is a primary recommendation.

Answer 3

The exteriors walls in the crawl space should be insulated first. By adding insulation the crawl space will stay warmer and keep the floor of the addition warmer. Two heat supplies might not be enough. You did not provide the other dimension. Like 25' x ?? and the ceiling height is???. How many return airs are in the room. You need both return airs (2) most likely 3 heat supplies to provide adequate heat/air.
You can add the insulation yourself. Go to a big box store and explain what the issue is. They can tell you tye type of insulation necessary to give you a good "R" rating.
DO NOT insulate the floor under the room addition. That will keep any heat radiating from the supplies in the crawl space and you want it to rise. You did not mention the furnace and btu's. What size??

Answer 4

Good news is that you don't have to upgrade the heating system.
You have two choices here.
First, you could relocate the thermostat to closer to the colder area of the house. This will keep the furnace running longer to warm the addition, but it will also cook-out the rest of the house.
Second you could install a booster fan somewhere along the run to the addition. This will pull more air through the ducting and warm the addition much better. I did this in my house and it worked great. The wiring instructions come in the box and it's relatively easy to do it yourself. I hired out for mine though.
Another thing to consider is to insulate the duct work if it isn't insulated already.

Answer 5

Check the insulation on the runs. If the return is cold then it may also be a total output which is insufficient.
The outlet spur may also be not up to the spec. so it may not have the capacity to transfer the heat required.

Answer 6

It would help us with a solution if you could tell us what an addion is.
There are plenty of Polish plumbers in UK who would be better at answering this question than me.

No wonder I couldn't understand what this was all about, this an American question on the UK & Ireland site!!

Answer 7

try wrapping the duct with ins. and use ceiling fans set in winter mode

Answer 8

put a radiator out there, either electric or from the ch system.

Answer 9

add more radiators its not that hard