well, you don't want to upsize if the old size was fine. bigger isn't better when talking sizing for your heating and cooling system. Stick with the same size of 3 tons.

Since you're getting a 3 ton a/c, there is no benefit to having a furnace capable of blowing 5 tons (around 2000 CFM) of air, as the a/c only needs about 1200 CFM. Doubt your duct system could handle the increased airflow.

A better question is, do you need around 72,000 BTU (output) of heat. Was a heat calc done? You might be able to get away with less than 3 ton a/c.

V

JZ

What size and efficiency furnace are you replacing? BTUs please.

Let's break down the quote.

I have to admit I don't follow your dealer's logic.

The smaller furnace quoted is a two stg var spd 80% eff furnace.

The larger furnace is a two stg var speed 95% eff furnace.

Both will require a two stg thermostat for best operation. I am not familiar with Emerson thermostats.

On the coil, dealer has quoted a third party ADP evap coil. That's not what I would recommend. I would want the best matching Rheem coil for your application. Certainly a point to raise with dealer.

How do you filter your return air?

I would also ask dealer to verify mdl number of AC condenser. Not certain but I believe he is quoting a discontinued mdl.

Post back.

IMO

Thanks for the quick responses. The current 25y old system is a Lennox 3-ton unit and has been doing a great job. No problems except it's old and in-efficient. Heats and cools great.

The reason for these two furnaces is we get a rebate from Rheem, & utility companies that adds up to $1500.
Filter would be a std 1"x14"x28" that comes with the system and is located in the furnace closet.

I'll see what he says about a Rheem coil vs. an ADP. And about a smaller 3-ton furnace.

Thanks again,
jz

What size in BTUs and efficiency is your existing furnace? No tons, just BTUs please.

And I would recommend a 4-5" pleated filter media cabinet over 1" filters.

IMO

JZ

cascade is correct.

The RGRM 95% eff furnace is available in a 60 KBTU model that probably is the correct size.

And the AC condenser quoted has been discontinued and replaced with mdl RARL037-JEZ. I wouldn't have the ADP coil. Is dealer quoting new refrigerant line set?

IMO

The existing furnace is a Lennox G16Q3-50 model. I can't find the BTU's in any of the info I have. Tried googling this make & model number & no luck. Probably too old (date on the manual 1984). Efficiency - I've no idea, one contractor said about 70%??

The only reason he proposed a 5-ton was done based on efficiency & to qualify for rebates. He recommends the 4-ton unit that matches up nicely with the A/C. He's getting me a quote for the matching Rheem coil & a better filter.

I've also gotten 2 other bids - a Ruud & a Carrier but found these products not on the same level as Rheem.

Thanks again,
jz

"I can't find the BTU's in any of the info I have. "

It is on the nameplate of the unit.

RUUD is identical to RHEEM; differ in color of unit and badge. Model numbers begin with R or U.

V

I am curious as to why you say Carrier is not as the same level as Rheem. Is it because the Carrier contractor quoted a lower grade of equipment?

Rudd and Rheem are the same equipment. You have to get a quote on the identical models from each manufacturer to make an apples to apples comparison.

@ Mike home - Carrier is not on the same playing field as Ruud or Rheem because of what I've read & heard of they're overall position in the residential HVAC products. Are you a Carrier contractor - convince me that their product is just as good.

I am a homeowner and not a Carrier contractor. My 25+ year old Carrier furnaces and condensers gave me very few problems in the time I owned them that I decided to stay with Carrier equipment when I replaced them two years ago.

I am not sure what you have heard and read. I own the Carrier Infinity systems and so far I have been very pleased with their performance. I am not an expert on Rudd or Rheem so I can't compare the equipment.

Is there something in particular you are concerned about?