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www.askmehelpdesk.com/heating-air-conditioning/benefits...

I'm replacing a 20 year old Lennox two stage heat pump. Live in northwest Florida panhandle. 2400 sq foot single story home. One AC tech suggested not using a two stage replacement unit because of cost. What are advantages of two stage over single and what should I consider in choosing replacement unit?:confused:

www.recinfocenter.com/aspx/News.aspx?NewsID=2070

Questline: The decision on whether to install a single-stage or a two-stage air-source heat pump is a trade-off between cost and comfort. A two-stage heat pump will cost more to purchase but will cost less to operate. The two-stage blower and compressor combination will also provide more even heating and cooling.

www.dannyheineman.com/webapp/p/222/what's-the-advantage-of...

It's like having two furnaces for the price of one, and you don't have the hassle of constantly adjusting your thermostat. Even Temperatures. Two stage furnaces are like having two furnaces in one: a small furnace (first stage/low heat) for mild days and a larger furnace (second stage/high heat) for extremely cold days.

www.reference.com/home-garden/two-stage-heat-pump-system...

A two-stage heat pump has a compressor which is capable of operating at a high and low speed, improving its ability to maintain the temperature in a home with greater precision. This type of HVAC system also offers the advantage of more economical heating and cooling.

www.hannabery.com/variable-speed-info.shtml

In addition, a two-stage furnace is much quieter since it doesn't operate at 100% capacity every time it runs, and creates less carbon dioxide emissions for the environment. If you are in the market for a new gas furnace, then without a doubt, a variable-speed, two-stage furnace would be your best choice! And the same applies to heat pumps.

airflowhtgair.com/faqs/two-stage-heating-cooling.php

Two-stage cooling means the air conditioner or heat pump has a compressor with two levels of operation: high for hot summer days and low for milder days. Since the low setting is adequate to meet household-cooling demands 80% of the time, a two-stage unit runs for longer periods and produces more even temperatures.

www.buildings.com/news/industry-news/articleid/15742/title/...

When choosing heat pumps for your next project, the two-stage heat pump unit is the clear choice for all around comfort and energy savings. Craig Fischbach has over 30 years of experience in the HVAC business. He is a product sales manager for Daikin McQuay

www.lennox.com/help/faqs/two-stage-heating

Two-stage heating means the furnace has two levels of heat output: high for cold winter days and low for milder days. Since the low setting is adequate to meet household heating demands 80% of the time, a two-stage unit runs for longer periods and provides more even heat distribution.

hvac-talk.com/vbb/showthread.php?323582-Single-Stage-vs...

The contractor's arguments for recommending a single stage instead of a dual stage heat pump are: 1) The single stage has a higher SEER and COP for most temperature ranges 2) The single stage is available in 3.5 ton, while the dual stage is only available in 4 ton, and our need is 3.5 ton

www.heatpumpguide.com/tech/benefits-of-variable-speed-air...

If you’ve been shopping for heat pump systems, you’ve been faced with the decision of choosing a single-speed air handler or spending more on a variable-speed model. The same thing is true for the heat pump itself, with single-stage, 2-stage and modulating heat pumps available.