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dottawat wrote: ↑ Could be a few reasons why the price is higher. Hard to say without seeing the ducting run plan. How much work has been done? If the place framed? Drywalled? For example, if it needs to go through a bulkhead, the new duct may not fit, and he needs to call back a carpenter or drywaller.

Or maybe it’s a brick wall and now he needs to core a 10” hole and needs to rent equipment for that. Or call back a sub to do it. Who knows. Did you ask him why it’s so high?

I agree that if the build hasn’t started, the price seems high. But if work has begun and your making a change late in the game ... then yeah, you’re going pay.

I would suggest you ignore the posters suggesting you take short cuts with the size of ducting needed. Penny wise pound foolish, imho.

Toukolou wrote: ↑ If you're referring to my post, I'm not suggesting OP cut corners on ducting size. I suggested he doesn't necessarily need a hood fan with a 10" duct, there are other relatively high powered hood fans that run with 6" and 8" ducts too (in fact, there are very few hoods that require 10" ducts).

As for the MUA requirement, I think I've been clear that I do believe it's good practice, but no necessarily required.

dottawat wrote: ↑ It sounded to me like that's what your were suggesting. You made a bunch of posts casting doubt on the need for MUA and 10" ducting. I advised OP to ignore them, and I stand by that advice.

OP should listen to the professionals working his job (not internet strangers) when specifying HVAC equipment. A large gas range can release a lot of air pollutants, it is a matter of health and safety. If he doesn't trust the pricing of the scope change: ask the contractor to justify it.

topcheese wrote: ↑Hi all

I’ll keep a long story short.

I am building a home. (Edit: I’m using a custom home builder to build a home for me)

I have a 36” gas stove.

I’m buying a 36” range hood that is more than 400 CFM.

The builder says that any range hood more than 400 CFM requires an air makeup system. That’s fair. It’s code. However they’re charging $2100 to install this (and there’s no way to avoid it unless I go with a 400 CFM hood)

Then, the range hood requires 10” venting. They’re charging $1100 for the rough in (vs standard 6” vents).

$3200 seems like an insane amount of money that likely costs them pennies. Especially since they’re starting bare bones.

Any thoughts on the matter? I was thinking of going with the builder grade system and ripping it out after I move. The concern is that I don’t want to damage tile/cabinets to change the vents from 6” to 10”, and I’m also worried about potential fitment issues.

Is it worth the hassle to save $1500?