Adding utility during lease period

[Jourdain Francine]

Hi All,

We have an old duplex where my fiancée and I live in one unit and have tenants in the other. We have natural gas being installed later this week with two meters and will be putting two boilers in to be able to separate the two units heat and hot water.

The problem is that our tenants lease is up this coming month and the boilers will not be done in time. We would like to keep their rent the same, but have them pay for their natural gas bill. Is there a way to put it in the lease that once the boilers are setup, they will pay for the natural gas?

We are still new to this. Thank you for all answers and conversation!