Dr.stickerdick
- Posts
- 176
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- 26
- Joined
- Jan 10, 2009
- Points
- 28
Josey good point, they do only throw off CO 2 when hot faucet is open. You could take exhaust(tankless heater) to grow room but have means of monitoring levels so you don't have problems in the household. Oh yeh, if your tankless is electric all bets are off, lol