Ductwork Placement
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Ductwork Placement (by GKARL [PA]) Nov 30, 2023 12:26 PM
       Ductwork Placement (by Vee [OH]) Nov 30, 2023 12:56 PM
       Ductwork Placement (by Robert J [CA]) Nov 30, 2023 12:59 PM
       Ductwork Placement (by Jason [VA]) Nov 30, 2023 2:03 PM
       Ductwork Placement (by DJ [VA]) Nov 30, 2023 2:20 PM
       Ductwork Placement (by Ken [NY]) Nov 30, 2023 3:11 PM
       Ductwork Placement (by Vee [OH]) Nov 30, 2023 4:54 PM
       Ductwork Placement (by zero [IN]) Nov 30, 2023 5:04 PM
       Ductwork Placement (by plenty [MO]) Nov 30, 2023 6:21 PM
       Ductwork Placement (by Robert,OntarioCanada [ON]) Nov 30, 2023 9:28 PM
       Ductwork Placement (by Ray-N-Pa [PA]) Dec 1, 2023 6:58 AM
       Ductwork Placement (by Dodge [PA]) Dec 1, 2023 7:12 AM
       Ductwork Placement (by gevans [SC]) Dec 1, 2023 8:19 AM
       Ductwork Placement (by GKARL [PA]) Dec 1, 2023 9:46 AM
       Ductwork Placement (by Unb [GA]) Dec 1, 2023 10:11 AM
       Ductwork Placement (by Robert,OntarioCanada [ON]) Dec 1, 2023 9:50 PM

Ductwork Placement (by GKARL [PA]) Posted on: Nov 30, 2023 12:26 PM

My rooming house has three floors with electric baseboard on each floor. I'm planning on installing a gas furnace with forced air. I have an open basement, so putting in the ductwork for the first floor shouldn't be an issue. I would like to run ductwork up to the second floor and keep the third floor as it. My highest electric bill is on the first and second floors. The third floor is the beneficiary of rising heat. How would they run the ductwork up to the second floor? Am I looking at ripping apart walls to run it up in wall cavities or is there some sort of exposed ductwork like they have in restaurants for this purpose? . Would an alternative to tearing up wall be to frame out a chase where needed and run the ductwork up via the chase? Just trying to get a handle on how this might work before talking with contractors.


Ductwork Placement (by Vee [OH]) Posted on: Nov 30, 2023 12:56 PM

Often in a retrofit job a closet corner is used to accomplish this, I don't remember when it became code (late 80's?) the returns must be closed in a rental style home, the returns are ussually twice the treated air runs to prevent blower cavitation (a simple sizing reference is 6 inch tubes are 40 sq in, you will need this to finish your manual-j and -d calculations. --184.59.xxx.xx

Ductwork Placement (by Robert J [CA]) Posted on: Nov 30, 2023 12:59 PM

Ductwork placement is a true art form, especially with a system "return". Only an EXPERT should design such a system. An alternative is a "Ductless" system. They make them is air and heat, air only and heat only.

When I install central air/heat systems for buildings I own, I have the bottom level with a split system using the basement for the heater and a place on the concrete outside for the air compressor. For the top level I use a combo system on the roof.

For all of the levels in between, I will sometime use direct heaters venting to the outside or upwards to the roof, with double vents running in interior walls. --47.155.xx.xxx

Ductwork Placement (by Jason [VA]) Posted on: Nov 30, 2023 2:03 PM

As Vee says, closets are typically used. --172.56.xxx.xxx

Ductwork Placement (by DJ [VA]) Posted on: Nov 30, 2023 2:20 PM

I would build out a chase, unless there was a Large closet with extra space - or an extra coat or linen closet that isn't needed. --68.229.xxx.xxx

Ductwork Placement (by Ken [NY]) Posted on: Nov 30, 2023 3:11 PM

we have used closets and if need be it can go up anywhere you can get it then build a wall around it --74.77.xx.xx

Ductwork Placement (by Vee [OH]) Posted on: Nov 30, 2023 4:54 PM

I should have also mentioned if you are crafty you cen use a floor chase to creat the return from a position away from treated air run, when you frame the cover of the treated air tubing frame oversize - use this for return - in the basement you can use aluminized cardboard to connect stuff to the return trunk. --184.59.xxx.xx

Ductwork Placement (by zero [IN]) Posted on: Nov 30, 2023 5:04 PM

My last house had ceiling cable heat when it was built. Somewhere along the line they installed GFA. This was a split level house with a huge crawlspace. They ran chases up through the bottom floor to get to the top one. They looked odd. I ended up building around them as I could. Made a book case from one to a wall. Things like that hid a little but it ruined the flow in the rooms below.

When I added GFA furnace to my mom in laws I ran everything on top as it was a dingle story with either no crawl or very little. The room I made into a mech room had it all run up as needed.

Maybe a small chase in the corner of each floor would do it? --107.147.xx.xxx

Ductwork Placement (by plenty [MO]) Posted on: Nov 30, 2023 6:21 PM

I've seen the duct work hidden in columns. Round or square. And if you have or had pocket doors there is usually a space there too. --172.59.xxx.xx

Ductwork Placement (by Robert,OntarioCanada [ON]) Posted on: Nov 30, 2023 9:28 PM

A forced air furnace can have a lot problems where if there is smoker or smokers then the smoke will travel through the entire building. A better is to install a high efficiency gas boiler than run Uponor pex heating pipes to each suite. Convert the copper finned baseboards where increase the length. Another option if to convert to Btu then will have a rough of size of baseboards. Longer copper finned baseboards will operate at lower temperatures. If baseboards are installed in series then can install a locking non electric thermostatic radiator valve to regulate heat. The advantage with radiant hot water heater is that later can buy some more wall mounted high efficiency gas boilers than can separate out heat where tenants control and pay for heat used. Ductwork is suitable for a single family home where if they smoke then no one is effected other the other family members. With Uponor pex heating pipe it is easy DIY job to connect up radiators to building where from the boiler up where the main manifold is in the basement. As each rental unit is regulated then all factors of heat loss and thermal gain with sunshine are taken into account. --207.236.xxx.xxx

Ductwork Placement (by Ray-N-Pa [PA]) Posted on: Dec 1, 2023 6:58 AM

That isn't going to be a cheap date after you factor in the ductwork cost. Maybe it is a bit cheaper to install spit systems or even a small boiler system for the first two floors. --24.101.xxx.xxx

Ductwork Placement (by Dodge [PA]) Posted on: Dec 1, 2023 7:12 AM

Metal ductwork also acts as a conduit for noise between all of the room duct vents. Check out high velocity which uses easier to retrofit softer ductwork. Several minisplits would also work well and would also provide cooling. --98.235.xxx.xxx

Ductwork Placement (by gevans [SC]) Posted on: Dec 1, 2023 8:19 AM

Depends on the layout of the floor. Sometimes your best bet is a central closet for the air handler and the central hallway for the ductwork. Use the top foot of space and drop the hall ceiling to 7 feet. shoot the air into each room on the wall that connects to the hall.

Or you can use multi head mini split ductless. --216.218.xxx.xxx

Ductwork Placement (by GKARL [PA]) Posted on: Dec 1, 2023 9:46 AM

I put Minisplits at another place and am happy with them. There are two issues that I need to deal with here: 1) Central control of temperature. I currently have a lockbox on all thermostats. I would need a central thermostat that only I controlled. 2) The actual cost saving over EBB. I think gas would be the cheapest.

It may be that I run gas on the first floor only which I'm assuming would be an easy with the open basement and keep the 2nd and 3rd on EBB or run minisplits on those two floors. Either way, I plan on keeping the EBB in place as a backup heat source. --209.122.xx.xxx

Ductwork Placement (by Unb [GA]) Posted on: Dec 1, 2023 10:11 AM

I agree with several others. This is not an install to do 2 times or mix co2 into inlet.

Have a pro klay it out. Then u do it --129.222.xx.xxx

Ductwork Placement (by Robert,OntarioCanada [ON]) Posted on: Dec 1, 2023 9:50 PM

A gas boiler is easy to control where a Tekmar electronic boiler control system along with locking non electric thermostatic radiator valves where less one degree variation. If more radiation then the boiler loop temperature is lower where a window open than a large temperature drop. High efficiency gas boilers where can mount a outside sensor then the boiler out temperature is dependant upon outside temperature so the heating loop always works to keeps the heating loop temperature as low as possible. --207.236.xxx.xxx

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