Date: 15/09/2019
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Dilemmas with Add-on Spaces

With real estate prices soaring in Nashville, many homeowners are opting to stay put and enhance their existing home rather than move. Perhaps you've decided to close in a garage to be used as living space, finish off a bonus room, add a sunroom, or turn basement storage into living space. Since these spaces were not part of your home's original central HVAC system, you're faced with a dilemma: what to do about heating and cooling these add-on spaces. In this post, we'll talk about some important considerations.

Location and configuration


Location and configuration of the add-on space matters when sizing the system.

basement remodel, add-on spaceCooling a basement which is partially or entirely underground will require less cooling capacity than cooling a room, such as a bonus room over the garage, which has a ceiling near the roof or attic, where heat tends to pool, and also has unconditioned space beneath it.

The number and type of windows and doors are also a consideratisuroom, add-on spaceon, as these are areas where cooling and heating energy is lost more rapidly.

​Does the add-on space get a lot of direct sun or is it protected by shade? Which direction does it face?  If you're enclosing a sunroom with large windows on many sides, it will require much more cooling than the other more traditional rooms of your house.

How high is the ceiling? Remember, you are cooling not just the square footage of the floor but the entire volume of the space.

Items such as this go into figuring the peak heating and cooling load for tAdd-on spacehe space.  Getting a system that is either too big (see our post "Think Bigger Is  Better? Not When it Comes to Cooling!") or too small can leave you feeling uncomfortable!  If you are in doubt about sizing an appropriate solution, you'll want to consult with an HVAC professional. No sense throwing money away on a system that won't do an adequate job.

How the space will be used

basement renovation, add-on space, remodelWill your add-on space be part of your regular day-to-day living space? Or will it be a room that might only be used occasionally, such as a guest room, or only used during certain seasons? Will the add-on space need to be a separate zone, so you can control the thermostat independently of the rest of the house?  This is often the case when your add-on space is in an area with vastly different needs from the rest of the house: a room that is underground (basement) or has lots of windows (a sunroom), or a room with special equipment or machinery. Will the room need just heating or just cooling or both? Knowing how the space will be used will aid you in selecting cooling and/or heating solutions that will be both functional and economical.

In our next post, we'll talk about the pros and cons of the various options for heating and cooling your add-on space.

Important Tips & Advice



You often don't think about your heating or air-conditioning system until something goes wrong. But there is so much you can do to help keep your system from breaking down. We regularly post information to help you learn what you can do to keep your system running, to save money and energy.  Search our many posts, videos, and podcasts, for valuable information that is never a sales pitch. Subscribe to receive an email when something new is posted, so you won’t miss any important tips.

Choosing a Repair Company

Whether you’re talking about heating or cooling, repairing or replacing a system, you want a company that can advise you reliably based on what is in your best interest, not based on what is convenient or what earns them the most money (commissions). We'll help you choose the best solution to fit your needs. Check out our many posts at HVAC News You Can Use and our podcasts.

Going Green

We're concerned about the environment and know all the latest technologies - such as geothermal systems, LED lights, and smart thermostats - that can reduce energy and put more "green" in your pocket!  We've provided HVAC systems in certified LEED buildings and written many posts on ways to Go Green.

The Sign of Service

We are a repair company performing a full range of commercial and residential heating, air conditioning, energy management and comfort products service, maintenance, and installation. We are a locally-owned company serving Nashville-Davidson County and the surrounding counties including Williamson, Rutherford, Wilson, Sumner, Robertson, and Cheatham.

Who We Are

Our service technicians are fully trained and experienced.  We can tackle the most complicated system to the simplest of systems – from large commercial plants to single-family homes.  Our ownership group of Eddie Hutton, Tony Anderson, Roger Eldridge,  Swaney Powers and Alan Seilbeck have over 125 years combined experience as leaders in the HVAC industry.


We are proud of our dispatchers that respond to your telephone call. When your system is down they make things happen. Our trucks are loaded with most parts needed for a quick repair. You can call day and night 7 days a week. Our normal weekday hours are 7:00AM to 5:00PM. Click on the button below to schedule a service call online. Emails and forms can only be answered weekdays from 7-5.”  

615-832-8500 Online Service Call


Did you know you should service your HVAC on a regular schedule – just like you would your car?  We have specialized maintenance programs to ensure the clean, energy efficient and safe operation of your HVAC systems.  This helps minimize service interruptions/breakdowns and maximize your equipment's lifespan.  All maintenance contract customers are assigned a primary technician that will get to know your facility and equipment and will treat it like his own.  You’ll receive discounts on repairs or new installations, and get priority service when it is cold or hot outside and you need service promptly.  Plus, maintenance contract customers are never charged overtime rates for emergency services after-hours, weekends or holidays. We’ll teach you how to save on maintenance costs by showing you things you can do yourself and when you need a technician. Here are some good posts:  Repair vs. Replace, Things to Try Before Calling for Service, Springtime Tips that Pay Off.


Our team takes on HVAC projects for office, school, retail and industrial facilities. Check out these case studies:

Replacement of a 250-ton Cooling Tower

Ductless HVAC at Brentwood Middle School