Does New York make you give up a gas furnace when it dies?

If you own an existing house, the All-Electric Buildings Act does not require you to replace a working gas furnace, and it does not require you to switch to electric heat when the furnace wears out. The law is written for new construction.

That is the answer to the question people type. The rest of this guide shows where the answer comes from, so you can check it and answer a contractor who tells you something different.

New York Energy Law section 11-104 directs the State Fire Prevention and Building Code Council to prohibit fossil fuel combustion systems in new buildings. It starts with buildings of seven stories or fewer and reaches all new buildings three years later, with listed exceptions.

The same section says the prohibition shall not be construed to apply to buildings that already exist, including their repair, alteration, addition or relocation, or the installation or continued use and maintenance of fossil fuel equipment in them.

That second paragraph is the one that matters to you. It names repair and alteration of existing buildings, and it names the installation and continued use of fossil fuel equipment. If a contractor cites this law, ask which part of it applies to your house.

The State Assembly's public explainer says most new construction seven stories or shorter must now be built to use electric heat and appliances. It says existing buildings will not be affected by the requirements, even if they are being repaired or renovated, and that existing gas appliances can be replaced with new gas appliances.

If you want a source to show a contractor, that explainer is short and written for homeowners. Ask whether the contractor has read it.

Laws change, and so do rules written under them. The statement above reflects the law as we found it in October 2026. If you read something newer, look for the text of the law and the date.

Meanwhile, a contractor may recommend a heat pump for good reasons, such as adding cooling or a house with no gas line. That is a choice, not a mandate. Ask for the heat pump quote and the gas furnace quote built from the same load worksheet and compare them.

Stay calm and ask three things. Which law or code section requires this for my house? Is my house an existing building? Can you put the requirement in writing?

If the answer points to a rule for new buildings, you have your reply. If it points to something else, ask for the citation and check it with your town or village code office.

You may also hear that you must go electric to be eligible for an incentive. That is a program rule, not a mandate. Our guide on paying for a new system explains how those rules work and why dates matter.

Choosing gas does not take away the questions that apply to any replacement. The size should come from a load calculation. The vent and the water heater should be on the quote. Your ducts or pipes should be able to carry the new equipment.

A condensing gas furnace vents out a side wall instead of up the chimney. That leaves a gas water heater alone on the old flue, and the quote should say what happens next. Oak Ridge National Laboratory describes the fix as a liner or a powered draft inducer, and says both add cost.

Your town or village also decides whether a permit is needed. Ask the contractor who files it, and read our guide on permits in Onondaga County if you want the local detail.

Several other rules get tangled up with the gas question. The refrigerant rule for air conditioners and heat pumps is one. A federal rule in force since January 1, 2025 has stopped the making or sale of new residential air conditioners and heat pumps that use refrigerants with a global warming potential of 700 or more. EPA has since confirmed that systems whose parts were made before the cutoff can still be installed. Nothing in it removes equipment that is already in service.

Carbon monoxide alarms are another. Under New York law, every one or two family home with an attached garage, or with appliances that may emit carbon monoxide, must have an operable alarm. That applies whether the new system burns gas or not, so check yours when the work is done.

The federal home improvement credit is a third. It ended for equipment placed in service after 2025, and it was a tax rule, not a gas rule. Ask a contractor who mentions it to show you the date.

News stories compress. A headline that says New York is ending gas heat may be describing a rule for new buildings, a proposal that has not passed, or a program for heat pumps. The text of the law is the only thing that settles it.

When you read about a change, look for three things: whether it applies to existing buildings, the date it takes effect, and the section that says so. If a story gives none of the three, treat it as a lead to check and not as a fact about your house.

Maybe you want to compare gas and electric because you are adding cooling anyway. That is a fair thing to do. Ask each contractor for a quote built on the same load worksheet, with the same ducts and the same comfort target.

Compare the lines we describe in our quote guide, and add one more: what happens on the coldest night. For a heat pump, that means the balance point and the backup. For a gas furnace, it means the vent and the water heater.

Neither answer is wrong. You are choosing between two systems that each have a right way to be installed, and the choice is yours.

• If your furnace is working, collect two quotes and ask each contractor the three questions.
• If a contractor says electric is required, ask for the citation.
• If you are curious about a heat pump, ask for both quotes, built on the same worksheet.

We do not sell fuel, pick your equipment or set a price. We give you the questions and introduce a local contractor. You decide whether anyone visits.