Furnace Noise Reduction – Practical Ways to Reduce Rattling Noise in Furnace

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Our bedroom is right above where the furnace is in our rented apartment. The furnace below makes a lot of noise, especially a rattling noise. Landlord is refusing to take any actions on it saying it is normal so I am trying to find some practical solutions.

This is what the device looks like:
(it may not be a furnace, I do not know..)

enter image description here

Yesterday when it was working I again woke up due to noise and went downstairs and did a video recording. As seen if I push it with a stick, the rattling noise goes away (not always, but it does if I push hard enough): https://streamable.com/9uiyhd

Are there any practical solutions I can apply to reduce this noise? I am willing to pay a few hundred dollars if needed myself..

Can you be as specific as you can for the tools I can use, I have zero experience in home improvement / maintenance. I am thinking about putting rocks on it (I do not know how yet), would that help?

Best Answer

A metal C-clamp might be safer. The wide metal cover is a draft hood that permits the furnace exhaust gases to pull up extra air if needed to maintain an upward draft. Occasionally, a strong wind outside can push air down the vertical flue. If the furnace is running, then hot gases could be pushed back into the room. A thermo-disc safety switch is usually mounted on the hood to detect back-flow and shut off the furnace. It is good to keep anything flammable away, including plastic clamps.