Agreed. If it walks like a duck, quacks like a duck.....
He mightn't want to call it rent, but that's what it is, and as such it's income and subject to tax at the marginal rate.
It's quite different from taking on a share of ESB or Eircom bills, where the company is simply paying the expense direct to a provider. Come to think of it, that's taxed too (indirectly through the provider's corporation tax).
Maybe what the Revenue mean is there's no problem with the company paying the expense, and claiming it as such, but I'd definitely want it in writing if you think they're telling you that you can avoid treating it as (personal) income for the property owner.