Retrofitting heat into an older home means working around three constraints that newer houses do not have: no existing ductwork, limited electrical capacity, and wall assemblies that were never designed to hide mechanical systems. Orangeville’s older core is full of houses like this, and their owners are routinely told the only answer is an expensive gut renovation. That is not true. This guide covers what is actually possible, what each option costs to run, and how to tell which one suits your house.

Why Older Homes Are a Different Problem

A century home was built to be heated by a coal or wood stove, later converted to a boiler with radiators, and in many cases converted again to forced air by whoever owned it in the 1970s. Each conversion left something behind, and the result is rarely a clean system.

The three constraints that decide your options are almost always the same. There may be no ductwork, or ducts squeezed into spaces too small to move enough air. The electrical service may be limited, since a 60 or 100 amp panel cannot support electric backup heat without an upgrade. And the walls are usually plaster and lath over solid framing, with no cavity to run anything through.

TL;DR

• No ductwork does not mean no options. Ductless heat pumps were designed for exactly this situation and need only a three-inch hole per indoor unit.
• Check your electrical panel before anything else. Service capacity is the constraint that most often changes the answer, and it is the cheapest thing to find out.
• Radiators are worth keeping. They are comfortable, they are already installed, and pairing them with ductless cooling is usually cheaper than tearing them out.
• Insulation beats equipment in an old house. Rebates cover up to $7,700 for insulation, and an uninsulated century home will make any system look bad.
• Downtown properties may need a heritage permit. If you are in the Downtown Orangeville Heritage Conservation District, exterior changes are worth checking before you choose where an outdoor unit goes.

Your Four Realistic Options

Option 1: Keep the Boiler, Add Ductless for Cooling

If you have working radiators, this is usually the least disruptive path. Hot water heat is genuinely comfortable, and radiators do not care how old the house is. You keep the heating system you have and add ductless indoor units for summer cooling, which also gives you supplementary heat in the shoulder seasons.

Best for: houses with a functioning boiler and no cooling at all. It is the lowest-cost route to year-round comfort in an older home.

Option 2: Ductless Heat Pumps Throughout

A ductless system uses one outdoor unit connected to individual indoor heads, each serving a room or zone. Installation requires a small hole per head rather than a duct chase, which is what makes it viable where ductwork is not.

The zoning is a real advantage in an old house, because century homes rarely heat evenly. Rooms above an unheated porch, additions built later, and third-floor spaces all behave differently, and a zoned system lets you treat them differently rather than overheating the whole house to fix one cold room.

Best for: houses with no ducts, uneven temperatures, or additions the original system never reached.

Option 3: Retrofit Ductwork with a Furnace or Ducted Heat Pump

Running new ductwork in an older house is possible, usually through closets, an unused chimney chase, or a dropped ceiling in the basement. It delivers a conventional system with whole-house filtration, which ductless cannot match.

Be honest about the cost. This is the most invasive option, it consumes usable space, and in a house with plaster walls the restoration work can rival the mechanical work. It makes sense when other renovations are already happening, and rarely as a standalone project.

Best for: houses already undergoing significant renovation, or where whole-house air filtration matters.

Option 4: Radiant Floor Heating in Renovated Areas

If you are already opening up a floor, radiant floor heating is worth considering for that area. It suits older homes with high ceilings, where forced air tends to stratify and leave the occupied space cool while the ceiling stays warm.

Best for: kitchen or bathroom renovations, additions, and stone or tile floors that feel cold underfoot.

Comparing the Options

Three Things to Check Before You Choose

Your Electrical Service

This is the first call, not the last. A 60 amp service will not support a heat pump with electric backup, and a 100 amp panel may or may not, depending on what else is on it. A service upgrade is a real cost, but knowing about it early changes which options are worth pricing.

Your Insulation

An older home losing heat through an uninsulated attic will make any system look inadequate. Under the Home Renovation Savings Program, insulation rebates run up to $7,700, which is often the highest-return work available on a century home. Doing it first also means the new system can be sized correctly rather than oversized to compensate.

Heritage District Requirements

Properties in the Downtown Orangeville Heritage Conservation District require a heritage permit for certain alterations. Before committing to a location for an outdoor condenser, particularly on a street-facing elevation, check with the Town’s planning department. This is a scheduling issue rather than a barrier, but it is a bad thing to discover on installation day.

Frequently Asked Questions

Can you install a heat pump in a house with no ductwork?

Yes. A ductless heat pump system uses individual indoor units connected to an outdoor unit by refrigerant lines, requiring only a small hole through the wall for each head. It was designed for houses without ducts and is the most common solution for century homes in Ontario.

Should I remove my old radiators?

Usually not. Working radiators provide comfortable, even heat and they are already paid for. In most older Orangeville homes it is cheaper and less disruptive to keep the boiler for heating and add ductless units for cooling than to remove a functioning hydronic system and replace it with forced air.

Does my old house need an electrical upgrade for a heat pump?

It depends on your existing service. A 60 amp service will need upgrading. A 100 amp panel may be sufficient depending on the equipment selected and what else is connected. This should be assessed before you choose a system, since it can meaningfully change the total cost.

Is it worth insulating a century home before replacing the heating system?

In most cases yes. An uninsulated older home loses heat faster than any system can economically replace, and insulation rebates of up to $7,700 are available under the Home Renovation Savings Program. Insulating first also allows the new system to be sized for the improved house rather than the old one.

Can I put an outdoor heat pump unit anywhere on a heritage property?

Not necessarily. Properties within the Downtown Orangeville Heritage Conservation District require a heritage permit for certain alterations, and placement on a visible elevation may be restricted. Confirm with the Town’s planning department before the installation is scheduled.

Action Steps

• Find your electrical panel rating first. It is written on the main breaker, and it determines which options are realistic.
• Get an attic insulation assessment before pricing equipment. It is usually the highest-return work on an older house and it changes the system sizing.
• Walk the house on a cold day and note which rooms are worst. Uneven heating points toward zoning, which points toward ductless.
• Check whether your property is in the heritage district. The Town maintains a heritage property register you can search.
• Book an in-home assessment rather than asking for a phone quote. Older homes vary too much for a quote given over the phone to mean anything.

Century homes have more options than their owners are usually told, but the right one depends on your electrical service, your insulation and your existing system, not on which equipment is most popular this year.