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norcalx

Clueless about HVAC quotes

NorCalX
11 years ago

Background info:

First time homeowner...it is 10 years old. Warm summers reach mid 100s and winter drops to 30 in this part of CA.

Recently our AC made crazy loud sounds when we turned it on. I switched it off ASAP and tried again 20 min later and all was well.

Recent annual checkup for AC found dead run cap and it was replaced (2nd dead cap since we moved in 2 years ago). Tech warned me compressor might be nearing its end and to start considering replacement.

Called someone out (diamond certified...A listing angie's list etc) just to get an idea what to expect...and I have no idea if the proposal is fair or marked up.

He asked sq. ft of home (2400 tw stories) noticed the old unit is 5 tons. Said replacement should be 5 too (researching after the fact he did not perform manual J load calc.)

AC is primary concern we like to keep it around 72-74

Heat around 74-76 in the Winter

Debating whether we wait for it to die or replace early (1yd old in house as well as pets that cant handle heat)

Actual proposal:

-14 SEER AC and matching 14 SEER coil

-95% 2 speed 90k BTU furnace with variable speed blower

-Upgrade filters to electrostatic washable

-Replace thermostats with new touchscreen models

-Labor/parts warranty 5yrs

-UV germicide light

-Turn key installation and haul away etc

-1 day installation

-Amana brands but no specific models given

$11.5K (special pricing if accepted within 3 days...$13.5k normal)

I also got a stand alone quote for UV...my youngest child has health problems and was told it is used in hospitals etc. for air quality.

$700 for UV installation only

Unable to secure financing terms we are willing to take on so passing on full HVAC offer but wanted to know if it was fair...ripoff etc. to determine if I should follow up with them when we are ready

Comments (10)

  • mike_home
    11 years ago
    last modified: 9 years ago

    Pricing varies by region, but no one is going to be able to comment on the price without knowing the model numbers of the equipment. You don't have a valid quote until you have the model number details.

    I don't care for a contractor who says you have 3 days to sign a contract otherwise the price goes up $2000. This is a high pressure sales tactic. I would pass on this contractor.

    You may need a 5 ton AC, but I would like to see a load calculation to confirm this. I think the furnace is oversized considering your mild winters.

    I am skeptical of UV lights. I would not spend the money on this. I would get a 4 inch media filter instead of an electronic air cleaner.

  • NorCalX
    Original Author
    11 years ago
    last modified: 9 years ago

    Thank you for the advice.

    I did not like the high pressure sales tactic either. That is usually enough to make me ignore the rest of the sales pitch.

    I will remember to get actual model numbers next time I have a contractor out to discuss it.

  • ionized_gw
    11 years ago
    last modified: 9 years ago

    "I also got a stand alone quote for UV...my youngest child has health problems and was told it is used in hospitals etc. for air quality.
    $700 for UV installation only"

    UV in AHU for commercial and industrial systems has been shown to work when installed properly. I have not seen similar data for residential systems. That does not mean that it does not exist.

  • energy_rater_la
    11 years ago
    last modified: 9 years ago

    rather than putting money into uv lights
    put the money into sealing ductwork & return air.

    if the stuff the uv addresses has no entry into
    the duct system, then there is no use for it.

    sealing the system & using 4" pleated media filters
    is a better option.
    no bulbs to replace yearly, and duct sealing will
    last, when properly done for the life of the
    duct system.

    electrostatic filters aren't an upgrade IMO.
    media filter is better investment.

    instead of changing r/a filter rack, price
    filters like the one in attached picture.
    these filters retrofit into existing filter
    racks. 1" lip on these filters make these
    filters work in existing r/a filter grills.
    I purchase mine directly from hvac supply
    by the case.

    best of luck

  • NorCalX
    Original Author
    11 years ago
    last modified: 9 years ago

    Wow very detailed advice thank you.

    As a follow up what is the general cost of sealing duct work? We had a free inspection from our AC maintenance company due to air flow and temperature balance and their expert said it wasn't worth the expense to try and fix airflow problems to a downstairs bedroom b/c the ducts run between the upper/lower floors and everything would have to be torn out and redone.

    He didn't tell me an actual price though. If it would make a major difference when an entire system is insalled it might be worth considering though.

    The draw to me was the wash/reuse of the electrostatic filter. Was quoted annual replacement costs for the 5" pleat type filters. But if I can do it myself like the normal thin filters we currently have it may be worth the upgrade for quality.

  • energy_rater_la
    11 years ago
    last modified: 9 years ago

    fyi:
    always get at least 3 bids.
    the bids should include model numbers
    so that you can compare same size & efficiency
    units to same size & efficiency units.

    don't let any company bully you into accepting
    their bid.

    you posted:
    We had a free inspection from our AC maintenance company due to air flow and temperature balance and their expert said it wasn't worth the expense to try and fix airflow problems to a downstairs bedroom b/c the ducts run between the upper/lower floors and everything would have to be torn out and redone.

    free inspection is worth what you paid for it.
    if it is difficult to seal ducts and or address air flow
    issues..then everything would have to be torn out and redone.

    often air flow issues can be solved by adding manual dampers at the plenum. by adjusting the air flow..
    less to some rooms, more to others..this can solve
    some of the issues.
    this is a different thing than just closing off supply
    registers, when you adjust the air flow at the plenum..
    where the ducts are connected..then you are re-distributing
    the total air flow..not just choking it off at its delivery point.

    if you have major air flow issues..then flow hoods
    and duct sizing & design may be needed.

    costs vary on duct sealing. it isn't rocket science,
    but it is a cramped often dirty job. materials are
    cheap..but its labor to install.

    when in between heating & cooling seasons hvac
    companies are more willing to do these type
    jobs..as opposed as to full on heating or cooling
    season. better rates, better temps to work in.

    where is the supply plenum? attic?
    what type ducts? flex or hard pipe?
    could you post pictures?

    while you can't get between floors, sealing where ducts
    exit the plenum (and plenum connections to equipment)
    helps to minimize leakage. if the ducts are flex..all
    the better. flex leaks at either end..not anywhere else
    unless the duct is torn.
    sealing at supply plenum and again where the duct ties to the supply box will reduce leakage.

    the next leakage site is where the supply box
    penetrates into the living space.
    often this cut into the sheetrock ceiling (for example)
    is oversized. as it is hidden by the supply grill,
    hvac companies don't often address this leakage.

    what I find is that this supply box is surrounded
    by insulation on attic floor. where the cut is
    oversized, insulation particles & attic temps
    condensate on supply grill to interior of house.
    sealing this area also addresses leakage,
    and reduces insulation particles entering the house.

    I use a mastic tape to seal the supply boxes to
    the sheetrock. attached is a picture of how it looks
    when finished. (hardcast #1402 brand mastic tape is
    the only product I use aside from paint on mastics)
    remove supply grill. cut mastic tape lengthwise into
    1 1/2" wide strips (tape is 3" wide) cut lenghts to
    size of supply box. place tape on sheetrock & fold
    into supply box. press well to seal. keep tape on
    sheetrock within area covered by supply grill.
    surfaces will need to be both clean and dry for
    tape to adhere.
    not only will this seal oversized cut, but it will
    keep box flat on attic floor when supply grill
    is installed.

    you can also seal bath fans with same method above
    by removing cover & using mastic tape. both
    supply boxes & bath fans are leaks I commonly find
    when testing ducts for leaks and houses for air
    infiltration. as they are both surrounded on attic
    floor by insulation..you understand why it is
    important to stop the air leakage.

    you can purchase hardcast 1402 at hvac supply
    or directly from hardcast's site.

    if you post pics of supply plenum, include
    return plenum and return inside house.
    if you open the return and take a picture inside
    of r/a it will help to determine how to seal these
    areas.

    if you are halfway handy..I can walk you through
    how to seal some of these areas. some of the sealing
    work can be done from inside your home.
    other work would have to be from inside attic or
    wherever equipment is located.

    best of luck

  • energy_rater_la
    11 years ago
    last modified: 9 years ago

    when you get bids
    ask each company to bid for brands they install.
    for instance Trane has alt brand American Standard.
    same mfg different name tag.
    usually cheaper price.

    if you have long cooling season, move up to
    15-17 SEER a/c.
    I find a good roi on these efficiencies
    going higher 18-21..not so much.

    5 tons on 2400 sq ft is rule of thumb sizing.
    investing in a load calculation is a good idea
    to avoid oversizing of equipment.

  • veesubotee
    11 years ago
    last modified: 9 years ago

    With regard to U/V lights: in a hospital situation, the room air is being 'bombarded' with the light as the dust/particulates waft about. In a ducted system, the airflow is traveling by the light at (hopefully) hundreds of feet per second.

    V

  • NorCalX
    Original Author
    11 years ago
    last modified: 9 years ago

    Thank you so much for the detailed responses.

    I feel like I am taking beginner classes in HVAC.

    Unfortunately I am not handy...I'm more of a patent law guy for computer stuff.

    I will try and look into the areas you suggested.

    Long cooling season is definitely us. Work from home so the AC is running non-stop. Will make sure to focus on the correct SEER range.

  • weedmeister
    11 years ago
    last modified: 9 years ago

    Think of each increased point of SEER being something like a 4% reduction in your electrical usage. The cost of going up each point increases but the reduction in your power bill remains the same. The sweet point is around 15SEER. Continuing higher costs more and therefore a longer ROI.

    But you're in CA which has high daytime electric rates. This might mean that you could afford to go higher in SEER. Also, you should check with the power company and see if they have any incentive rebates.