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A company want to install an American Standard Accoliner WO451 for $7,100. And haul away the old boiler. Is this a going price for NYC area?

Can I spray foam insulate 2nd floor roof and wall? The rooms will be bedrooms. A spray foam contractor wants to do it and another contractor says it is toxic for bedrooms and wants to blow insulation in. Any advise? Thank you.https://www.garagejournal.com/forum/hamb/editor/menupop.gif

I am replacing some sheet rocks on the second floor. I opened this part and saw the chimney and this stuff on it (see picture). Started to take it off and notice the power, dust that coming off it. Does anyone know if this is asbestos? Thank you.

Fujitsu ASU9RLS2 For this unit can the piping go up to run in a drop ceiling? The drain hose will go out. The unit will be mounted four inches below the drop ceiling. The piping (except the drain hose) will go up the wall into the ceiling then run to back of the house in the drop ceiling...

Should I use a fused or a non fused disconnect for a mini split condenser. Fujitsu AOU18RXLFZH OUTDOOR UNIT : 36 type Power source 208/230 V ~ 60 Hz I am looking at this one, https://www.amazon.com/dp/B000LF42NK/?tag=atomicindus08-20. Thanks.

Does anyone know the difference(s) of HVAC licensed contractor, HVAC certified contractor and HVAC contractor company? I searched online but still was not clear to me. I hope someone here can add some clarity. Thanks.

I am planning to install a 5 zone mini split Mitsubishi. I told the hvac guy that I will do the install and I want him to pressure and ck for leak, vacuum and charge (release and check the r410a). He said he would do it. But he wants the cut the flares and solder all the joints. (kinda do...