I agree that there is no sediment leg and that the shutoff valve should be above the union. As to an emergency shutoff switchv, it may be on an opposing wall (which is acceptable). The wire seen to the right of the furnace does not go through the filter, and is likely a thermostat wire, which is low tension. Sloppy, but technically not a problem.
Joe, That was the power to the unit not the thermostat wire. It did not go through the filter. It was “Plugged” in a light fixture ( not in view) with a standard extension cord cut and wire nut . No proper electrical wiring was present.
As to combustion air, it cannot be determined from the photo, but if there is a louvered door on this closet, it’s fine. Firestop is needed at the ceiling penetration.
That would not be acceptable . The return air duct is clearly wrong and placing a louvered door in that location would not only create more of a problem but it would contribute to the poor performance and even assist in Carbon Monoxide production.
Wood louvered doors generally have to be considered 25% free area!
Metal louvers are 75% free area.
1 square inch for every 1000 BTU’s then figure on the loss of area.
“A return air opening cannot be installed in the same room as the furnance.
Return air ducts and combustion air openings are to be installed so that they do not interfere with each other’s function.”
Per MFG guidlines its wrong wrong Plus:
Code check page 7 (HVAC)
IRC 1602.3 Return air (Must be 10ft. min. from natural-draft appliance combustion chamber/draft hood or wood-burning fireplace.
Fire stop at ceiling yes BUT this combination of venting types is a problem
Improper connections and slope. The “chimney” was tar-ed at the roof penetration…:roll: Even with “B” vent the gap is wrong…
This unit was NOT installated by a licensed qualified HVAC professional. Its a hack job clearly done on the sly.
Return air ducting may be undersized, but this installation is tied to existing ductwork in the home. The comment regarding a 6’ distance for return ducting was insteresting.
The picture does not clearly show everything. There is NO return air “Duct” per definition of a return air duct. . That box off the right side is the “return air duct” . :roll:
The requirement per code and local utility safety are not here. This mess is done without understanding the concepts of operation of this unit. The powerful “pull” from the blower motor ( via open return air duct) would be strong enough to influence the burners.
Question: Was this installation inspected and approved by the AHJ? If so, the best one can do is to refer it to a licensed HVAC contractor, one of which (I assume), installed this unit.
Most likey NOT AHJ inspected or installed by a licensed HVAC contractor. If that were the case I would have found a sticker/ tag (you hope) for service by the installer/ company/ contractor.
Heating systems are typically installed wherever they can fit. As ductwork is installed, and phased inspections take place, all involved are aware of the rules and constraints. And, as with most codes, there are exceptions and interpretations.