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An Oversized Furnace Can Be a Costly Mistake

An oversized furnace isn’t a better furnace. Too much heat can actually make your living spaces less comfortable in winter, not more. It’s also wasteful from an energy efficiency standpoint, as well as a from a financial one.

In the past, residential furnaces were often "one-sized" rather than installed on the basis of an accurate load calculation of the actual thermal requirements of the home. To cover for the inevitable errors in this process, builders and contractors simply installed a furnace that was too big for the job. Many homeowners are stuck paying for these past mistakes.

Here are some of the ways an oversized furnace is bigger but not better.

oversized furnace can be a costly mistake

Inconsistent Heat

While an excess of output may be a benefit to blast a freezing house with heat, that oversized approach quickly becomes a liability. Rooms closer to the furnace will often become uncomfortably hot and, as the thermostat responds to the abrupt influx of heat, the system will rapidly cycle back off before other rooms farther away have adequately warmed.

Poor Efficiency

Because a furnace reaches its manufacturer’s efficiency specs only after it's reached full operating temperature, an oversized furnace that cycles on and off rapidly never reaches that point. It's always warming up and never reaching the most efficient mode. A notable feature of high-efficiency furnaces is that they operate at low output but run almost all the time, cycling off very infrequently. An oversized furnace does the opposite.

Shortened Service Life

The on/off operation of oversized furnaces stresses the most expensive components in the system: the heat exchanger and blower motor. The metal in a heat exchanger expands and contracts with each heating or cooling cycle. Frequent cycling may induce stress cracks in the heat exchanger that can leak dangerous carbon monoxide gas, as well as render the furnace unrepairable from a financial standpoint. Like any electric motor, constant on/off operation inflicts excess wear and tear on the blower, leading to early replacement.

For more reasons to avoid an oversized furnace, contact the pros at Rodenhiser Plumbing, Heating & Air Conditioning. We're proud to serve homeowners in the Route 495/128 area of Massachusetts.

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Call Rodenhiser at 1-800-462-9710

You Can Depend On Rodenhiser

Call Rodenhiser at 1-800-462-9710

When you are looking for plumbing, electrical, heating or air conditioning in the Route 495 / 128 area, you will be delighted that you called Massachusetts' trusted choice since 1928.

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Rodenhiser Plumbing, Heating, Air Conditioning & Electric, 325 Hopping Brook Rd Holliston MA 01746. Call 1-800-462-9710 Master Plumber: #10961 | Master Electrician #21982A | Sheet Metal Master-Unrestricted: #5867
*Conditions apply, not applicable with any other offer, nor off any trip or diagnostic fee, or previous service. No cash value. Call For details. *For WEB-AC-CHECK Offer also: Promotional price limited to 1 system per home, additional units will be billed at full price. Refrigerant not included. Includes standard 1in air filter, other sizes subject to additional charges. Residential systems only. Must reside within our service area. *For WEB-A-50 Offer also: Not valid on preventative maintenance nor prior purchases. *For WEB-A-75 Offer also: Call or see specials page for more information. *For WEB-H-3250 Offer also: Subject to rebate eligibility and qualifying system choice. The $189 A/C System check examines and assesses the mechanical parts of the air conditioning system. Refrigerant not included. Promotional price applicable to 1 unit per household, additional units will charged at standard rate. Limited to residential homes within our service area.
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