Electric Baseboard heating

[Will Bert]

Hi BP...I have an old house in 1 of the bathrooms in the back of the house which is an addition to the house the oil base heat doesn't heat up the bathroom the baseboard gets lux warm if that...I was thinking of buying an electric baseboard heating system just for that room...The tenants lease is up but they want to stay and I would like for them to stay...

I'm not raising the rent but adding the electric baseboard heating system how would you approach the situation as the rent is already at market value and the tenants are pretty good ???