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=====Heatpump Model and Installer Research=====
August 2022, we are looking into buying and installing one or more heatpumps for our oil-heated forced-hot-water home to reduce our winter oil use and to give us some cooling during the summer heat/humidity.

===Heat pump installers===
|< 100% 5% 20% 25% - >|
^<fs x-small>Commenter</fs>^Company^Contact info^Comments^
|<fs x-small>AS MS WR</fs>|NETR Heating and Cooling Systems (Woburn)|https://www.netrinc.com/ 781-933-6387 |Good tech service & knowledgeable technicians|
|<fs x-small>MM NA</fs>|Muirfield Electric (Ayer)|https://muirfieldmechanical.com/ 978-263-7130|did what they said they'd do, on schedule, middle-of-road price, no extra fuss|
|<fs x-small>RK</fs>|128 Heating and Plumbing (Wakefield)|https://www.128plumbing.com/ 781-670-3261|(annoying website, can't get rid of stuff covering info)|
|<fs x-small>AW</fs>|Central Cooling and Heating (Woburn)|https://centralcooling.com/ 800-236-8725|they did rebate paperwork, good company. |
|<fs x-small>RR CL JL</fs>|Total Comfort (Burlington)|https://www.totalcomfortmech.com/lexington 781-999-1275, 781-697-9016|Good consultation, communication. helped w/MassSave|
|<fs x-small>JL MA</fs>|NetZero Heating and Air Conditioning (Billerica)|https://netzerohvac.net/ 888-306-3893| |
|<fs x-small>WT</fs>|New England Ductless (Boston)|https://www.newenglandductless.com/ 781-995-2665|Did MassSave paperwork. Charges $750 for Manual-J (detailed technical assessment)|
| |Homeworks Energy| |met with Brian 8/18/2022, got quote|
| |Tetra| |met virtually with Parish 8/19/2022, got quote|

===Heat pump devices===
|Mitsubishi|high demand, long lead times (8+ months?)|
|Bosch|
|Daikin|
|LG|One Lex List member reported issues with non-LG thermostat; system would stay on, but this might be related to the usage learning curve; pressure relief valve issue; be sure to verify experience of installers and techs|
|Samsung|Sold/installed by Homeworks|
|Gree|Sold/installed by Tetra|

Note that whatever heat pump you choose, to get rebates, it has to be on the MassSave list, see: [[https://www.masssave.com/saving/residential-rebates/air-source-heat-pumps/heat-pump-qualified-list]]

====Concerns to address====
  * Will your electrical feed need to be upgraded?  (If you have 200 Amp service, will that be enough to support one or more heat pumps?)
  * Temperature range. Make sure your units can handle the temps in our area (eg, -20 to 110F)
  * Will the unit work with your existing thermostat or must it be replaced?
  * Will (and if so how will) heat pump work with existing home heating system?
  * Verify experience of Installers and Tech support

====Ideas====
  * Get wall units for rooms with doors you can close (to isolate heat/cool to the room)
  * Heat pump for your hot water. will chill your basement if it's in the basement

----


====Analysis & Comparison, heat pump vs oil boiler====
We got a quote from a company for the cost of a whole-house solution.  There are two rebates available to us, approx $5k since we're going whole-house, and $10k if we also sign an agreement that we will only use oil heat in an emergency.

Description of quoted system: TBD
===Assumptions===
We have an oil-fueled boiler forced hot water heating system. We have a single window air conditioner that the heat pumps would replace.  Here are the cost factors for our situation.

Assuming for the purpose of this analysis:
  * Energy costs stay the same over the analysis period (oil and electricity)
  * Maintenance costs stay the same over the analysis period
  * We are not considering electricity savings by using heat pumps over the one window air conditioner we're using

===Cost analysis===
<csv hdr_rows=1>


,"Homeworks
Whole house","Tetra
Whole house","Oil heat only
Whole house"
Condensers,20k & 20k,24k & 24k,
Heads,"7k, 12k","9k, 12k",
,"7k, 7k, 9k","9k, 9k, 9k",
Manufacturer,Samsung,Gree,
Works to temp,,-22F,
Manual J?,,"Yes, no cost",
Wifi to heads?,,Yes ,
Service?,1st yr included then pay,"1st yr included, then thru installer",annual cleaning
"FYI, Heat loan: 7 yrs no int, monthly:",214.29,115.37,
'===TOTAL COST CALCULATION===,,,
Eqpt & installation,28000,19691,0
whole house rebate,10000,10000,0
EQUIPMENT & INSTALL cost,18000,9691,0
heatpump MAINTENANCE/yr after 1st yr,535,,0
oil boiler MAINTENANCE/yr,200,200,200
electric svc incremement $/mo (est),100,100,
gallons oil/year (est),100,100,700
oil cost/gal (est),4,4,4
ENERGY COST/yr,1600,1600,2800
,,,
TOTAL COST END OF YEAR,,,
1,19800,11491,3000
2,22135,13291,6000
5,29140,18691,15000
6,31475,20491,18000
7,33810,22291,21000
8,36145,24091,24000
9,38480,25891,27000
10,40815,27691,30000
15,52490,36691,45000
20,64165,45691,60000
25,75840,54691,75000





</csv>

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