HomeLittleton ProductsHVAC DuctCleaning Service/InstallDepartment CouponsSpecials CompanyOverview ☰Menu

Littleton Heating and Air Conditioning serving Denver Metro, Lakewood, Aurora, Centennial, Littleton, Highlands Ranch CO (303) 798-3880

Littleton Furnace Replacement and Installation (303)798-3880

Do you need an expert furnace replacement in Littleton? Call our furnace replacement department today at (303) 798-3880 to receive a free estimate on a new furnace. We will send our home comfort adviser to your home to assess your situation and provide options that best fit your needs and budget.

aire-foo Lennox Furnace ML180uh Lennox Furnace SL280V Lennox Furnace EL296 Lennox Furnace SL98V Lennox Furnace

Once you have decided it’s time to get a new replacement furnace, now you must decide what brand, model, efficiency and size you need. That’s when our professional Home Comfort Advisors become your best source of information to help you make the best decision for the needs of your home, family and budget.

There are many replacement furnaces available from the basic single stage 80% efficient furnace up to fully modulating variable capacity 97% efficient furnaces with high efficiency variable speed blower motors and everywhere in between. Call us today and we can provide you with all the information on the differences and pros and cons of each model of furnace so you can make an educated decision and purchase the best replacement furnace for you and your family.

Dave Lennox

When Should I Have My Furnace Replaced?

Saying you should have your furnace replaced every 15 or 20 years doesn’t paint the clearest picture of the situation. It’s true, a properly installed heating system can last for up to 20 years, but you have to take care of it during that time. Sometimes, as a furnace gets older the repairs start to add up and the cost of repairs doesn’t justify keeping the old system around. There may also be newer, more energy efficient furnaces available that will save money when compared to the older one. The key is to align yourself with a trusted heating expert and then follow their advice on when the best time is to replace your old furnace with a new one.

Littleton furnace replacement proper sizing

Your home comfort system is most likely the single biggest use of energy in your home. In fact, over a third of the energy used in the United States is used to heat and cool buildings. Having a properly designed and installed heating and air conditioning system will have the biggest impact on your energy costs.

Using manual J to properly size your furnace

Furnace and air conditioner size is based on Manual J - "Winter Heat Loss and Summer Heat Gain".

Furnace replacement and air conditioner size is based on using Manual J

Heat gain means during the summer the heat comes into your home thus it's called a gain. During the winter the heat inside your home transfers to the outside thus it's referred to as heat loss. Think about it. Heat always transfers to a colder area, Heat gain for the summer.

Every home should have a calculation done and in accordance with Manual "J" and in accordance with ACCA'S (Air Conditioning Contractor's Association) standards. To be eligible for utility and goverment rebates, and incentives will require this to be done.

Furnace or air conditioner size, (BTU requirement), is based on the type of construction of your home. The insulation it has or will have in the walls or attic, whether the attic is ventilated, The windows single-double-triple pane plus there type, The infiltration of air through your doors, windows, receptacles, ductwork, in general is the home getting above average of infiltration, and how hot or cold it gets in your area. All these things add up to the size of heating and air conditioning unit you must have to maintain your comfort.

What to expect when purchasing a replacement furnace

A new replacement furnace will operate and perform quite differently than older design furnaces. In order to gain efficiency heat exchanger designs and air flow movement around them had to change substantially. With the new designs some of the things you may notice are lower air temperatures at the supply registers, more air noise at supply registers and return air grills, longer run cycles, lower utility costs and increased comfort.

New furnaces are broken down into two basic categories - 80% efficient and 90%+ high efficient. The main differences between the two are 90%+ efficient furnaces are condensing furnaces via a secondary heat exchanger. In the secondary heat exchanger flue gasses are condensed and the residual heat in the condensate is extracted and applied to the air moving across the heat exchanger causing improved efficiency. The difference in design and operation can take efficiencies up to 98%. These furnaces also require special venting systems and be installed in a location where condensate removal can be achieved and protection from freezing can be achieved. 80% efficient replacement furnaces can generally vent into your existing venting system and require less maintenance than the 90%+ furnaces.

With either furnace the smaller heat exchanger design requires more air flow to prevent over heating than the older design furnaces, so they can produce more air flow noise and lower outlet temperatures, but the lower outlet temperatures can provide longer run cycles which in turn provide better air stratification throughout the home and create more comfort and even temperatures. Multi-stage or variable capacity replacement furnaces take run cycle time, even temperatures and comfort to another level when operating at reduced BTU capacities which in turn reduces operating costs even further. Add variable speed blower motors which are electronically efficient to the mix, they can elevate the indoor comfort even more and also help provide better indoor air quality with continuous fan operation at reduced cfm rates when installed in conjunction high efficiency media filters.

No matter which replacement furnace you decide on when compared to older design furnaces you will get more efficient operation and better comfort, so you really can’t go wrong with any choice.

Littleton Heating and Air Conditioning - 1 Customer Review - Littleton, CO
Click for the BBB Business Review of this Heating Contractors in Littleton CO
Lennox expert hvac contractor logo
Air Conditioning Contractors of America  logo
NATE, North American Technician Excellence, logo HVAC
face book logo linked to Littleton Heating and Air Conditioning face book page.
Chamber Certified
ACCA- Air Conditioning Contractors of America
puron-refrigerant for air conditioner
2 ladies sitting on the couch smiling and each holding cup of tea, they are cozy.
  • Dave Lennox with furnace, air conditioner and filters Littleton Colorado
    Littleton Furnace Repair Littleton Furnace Replacement Littleton Furnace Prices Littleton AC Repair Littleton AC Replacement Littleton AC Prices
  • Dave Lennox with furnace, air conditioner and filters Englewood Colorado
    Englewood Furnace Repair Englewood Furnace Replacement Englewood Furnace Prices Englewood AC Repair Englewood AC Replacement Englewood AC Prices
  • Dave Lennox with furnace, air conditioner and filters Lakewood Colorado
    Lakewood Furnace Repair Lakewood Furnace Replacement Lakewood Furnace Prices Lakewood AC Repair Lakewood AC Replacement Lakewood AC Prices
  • Dave Lennox with furnace, air conditioner and filters Highlands Ranch Colorado
    Highlands Ranch Furnace Repair Highlands Ranch Furnace Replacement Highlands Ranch Furnace Prices Highlands Ranch AC Repair Highlands Ranch AC Replacement Highlands Ranch AC Prices
  • Dave Lennox with furnace, air conditioner and filters Centennial Colorado
    Centennial Furnace Repair Centennial Furnace Replacement Centennial Furnace Prices Centennial AC Repair Centennial AC Replacement Centennial AC Prices
  • Dave Lennox with furnace, air conditioner and filters Aurora Colorado
    Aurora Furnace Repair Aurora Furnace Replacement Aurora Furnace Prices Aurora AC Repair Aurora AC Replacement Aurora AC Prices
  • Dave Lennox with furnace, air conditioner and filters Denver Colorado
    Denver Furnace Repair Denver Furnace Replacement Denver Furnace Prices Denver AC Repair Denver AC Replacement Denver AC Prices
  • Direction: Littleton Heating and Air Conditioning - 12415 Dumont Way Unit 103 Littleton, CO 80125 - Highlands Ranch, CO 80125 Phone: (303) 798-3880
  • E-Mail:pure@littletonair.com
  • Professionals Recommend Heating and Air Conditioning Company
  • Littleton Heating and Air Conditioning CYLEX Silver awarded company
  • Privacy notice bbb
  • Links: Comfort Plan Whole house humidifiers Zoning Article by BBB HVAC Gallery Glossary of Terms Maintenance Tips Promotion Page Refrigerants phase out Residential Electric Generators Water Heaters Installation Department Canyon Air Heating and Air Conditioning Mesa AZ
  • Archives: Solar attic fan Whole House air filtration Why Lennox Equipment XC13 Air Conditioner XC14 Air Conditioner XC16 Air Conditioner XC17 Air Conditioner XC21 Air Conditioner Signature furnace SLP98 Signature furnace SL280V Customer Reviews XP17 Heat pump XP21 Heat pump Water Heater Law in effect on 04/16/2015 Furnace repair
  • Service Area
    We proudly service all of the Denver Metro communities since 1972. We service, repair and install furnaces, air conditioners, boilers, water heaters, humidifiers and indoor air quality products in the following cities and zip codes in Colorado: Aurora Co 80010, Aurora Co 80011, Aurora Co 80012, Aurora Co 80013, Aurora Co 80014, Aurora Co 80015, Aurora Co 80016, Aurora Co 80017, Aurora Co 80018, Aurora Co 80019, Aurora Co 80040, Aurora Co 80041. Aurora Co 80042, Aurora Co 80044, Aurora Co 80045, Aurora Co 80046, Aurora Co 80047. Bow Mar 80123. Castle Pines 80108. Castle Rock Co 80014. Castle Rock Co 80108. Castle Rock Co 80109, Castle Rock Co 80116, Castle Rock CO 80118. Centennial Co 80111, Centennial Co 80015, Centennial Co 80016. Centennial Co 80112, Centennial Co 80121, Centennial Co 80122. Cherry Hills Village Co 80110, Cherry Hills Village Co 80111, Cherry Hills Village Co 80113. Columbine Valley Co 80123. Denver Co 80202. Denver Co 80203, Denver Co 80204. Denver Co 80205, Denver Co 80206, Denver Co 80207, Denver Co 80209, Denver Co 80210, Denver Co 80211. Englewood Co 80112, Englewood Co 8011, Englewood Co 80112, Englewood Co 80113, Englewood Co 80120. Greenwood Village Co 80121. Highlands Ranch Co 80124, Highlands Ranch Co 80125, Highlands Ranch Co 80126, Highlands Ranch Co 80129, Highlands Ranch Co 80130, Highlands Ranch Co 80163. Ken Caryl Co 80127, Ken Caryl, Lakewood Co 80215, Lakewood Co 80226. Lone Tree Co 80124, Lone Tree. Littleton Co 80120, Littleton Co 80121, Littleton Co 80122, Littleton Co 80123, Littleton Co 80125, Littleton Co 80126, Littleton Co 80127, Littleton Co 80128, Littleton Co 80129, Littleton Co 80130, Littleton Co 80160, Littleton Co 80161, Littleton Co 80162, 80163, 80165, 80166. Parker Co, Parker Co 80134, Parker Co and the surrounding cities in Colorado. We service, repair and install furnaces and air conditioners from all the major brands like: Lennox, Rheem, Carrier, York, Goodman, Trane, ComfortMaker and other.