Can A New Heating System Lower Utility Costs In Rental Properties?

Whether a new heating system will lower utility costs in a rental property depends on a detail most landlords never get asked when they’re quoted a high-efficiency furnace: who actually pays the gas bill. The efficiency gain itself is real and measurable. Whether you ever see it on paper is a separate question, and it’s the one worth answering before you spend.

Will A New Heating System Actually Lower Utility Bills?

Yes, in the sense that a more efficient furnace burns less fuel to produce the same amount of heat. That’s what the AFUE rating measures: the percentage of fuel a furnace actually converts into usable heat instead of losing up the flue. Our Heating System Buying Guide covers the equipment side of that decision in more depth.

How Much Difference Does Furnace Efficiency Really Make?

The current federal minimum for a new non-weatherized gas furnace is 80% AFUE, but older units still in service around Indianapolis and Zionsville can run as low as 56% to 70%. Replacing a 70% furnace with a high-efficiency furnace rated at 95%, a condensing furnace, is a genuine drop in fuel burned per unit of heat delivered. Some owners are also weighing a heat pump instead of a furnace replacement; that’s a separate sizing and fuel-type conversation, but the efficiency logic below applies either way.

Who Sees The Savings, You Or Your Tenant?

That depends entirely on who pays the heating bill, and it’s the single question that determines whether the efficiency argument even applies to your property. Economists have a name for this: the landlord tenant split incentive. If heat is included in rent, you capture the fuel savings directly, and this becomes a real heating system operating cost question. If your tenant pays the gas bill, you fund the new equipment and they get the lower bill.

Why Does Tenant-Paid Heat Change The Math Entirely?

In a tenant-paid unit, the return on a heating upgrade is real but indirect: better marketability, fewer complaints about rental property utility costs, and one less reason a tenant has to leave. It isn’t a line item on your ledger, and it isn’t a payback calculation. Landlords weighing heating costs rental decisions against a straight financial return should know upfront that this case doesn’t work like the heat-included one.

Why Do Real Savings Often Fall Short Of The Estimate?

Because the modeled number assumes conditions a rental rarely has: a thermostat held at one set point, a reasonably tight building envelope, and correctly sized equipment. You control none of the first and often not the second. Furnace oversizing is the most common mistake landlords make on a furnace replacement rental property owners approve without checking sizing first; your ductwork was built for a specific airflow, and an oversized furnace builds back pressure and shuts itself down early, which hurts both comfort and efficiency. A proper Manual J load calculation is what preserves whatever efficiency rating the new equipment is actually sold on. Even with correct sizing, air sealing, insulation, and duct sealing commonly return more per dollar spent than swapping equipment, since they fix the losses a furnace can’t compensate for.

Does The 2028 Furnace Efficiency Standard Change Your Replacement Timing?

Not for equipment you already own. The furnace efficiency standard 2028 rule requires new non-weatherized gas furnaces manufactured after December 18, 2028 to reach at least 95% AFUE, but it keys to manufacture date, not installation or ownership, so no working furnace has to be replaced because of it. The rule’s legal footing has also moved since it was finalized: a federal appeals court upheld it in late 2025, but the Supreme Court vacated that decision in mid-2026 and sent the case back for reconsideration after the government’s own position on the rule changed, and DOE is separately weighing whether to push the compliance date out to 2030. Treat the date as planning information rather than a deadline to act on. What it does affect is what equipment will be available and what it costs later, and for older housing stock, 95% AFUE effectively means condensing technology, which needs PVC venting and a condensate drain path that an existing metal flue and older mechanical room may not have. That’s a retrofit cost worth asking about before a quote, not after.

Kind, Capable HVAC Service For Indianapolis Investment Properties

HomeSense supports Indianapolis rental property owners with investment property HVAC service built around your actual numbers, not a sales pitch: a proper Manual J calculation before any furnace replacement or installation, honest word on whether the split incentive applies to your situation, and scoping that flags condensing venting issues on older properties before you’re quoted. If you’re weighing energy efficiency rental property upgrades across your portfolio, schedule an assessment with HomeSense, or call us at (317) 203-8149.