PlumbBros

Heating • Cooling • Plumbing
2.4 Updated March 1, 2026
Required DLC
Seasons

About PlumbBros

Upgrade your homes with the PlumbBros Central Air Conditioning and Heating System! An alternative to the Thermostat/Temperature system that came with the Seasons EP.

In The Sims 4 Seasons, Temperature is represented by states like Freezing, Cold, Cool, Warm, Hot, Burning, instead of using number values we usually see in real life. The Thermostat introduced a whole new way to affect your sims’ home like never seen before in the franchise, however it only provides two simple states that affect your bills more than it affects your sims.

PlumbBros introduces realistic temperature flux to the indoors, with a fully simulated system that is dependent on how you build and optimize your homes.

Download • Download • Download •
Downloads in Last 30 Days
2.4 Released March 1, 2026 • lot51_plumbbros_v2.4.zip

Installation Notes Script and Package Mod

Unzip and place the package and ts4script in your Mods folder. Make sure you only have ONE copy at a time.

Double check that your unzipped script does not end with a number in the case your destination folder had an existing file with the name — otherwise the script will not load.

If you organize your CC, make sure scripts are not placed more than one folder deep.

See Mod Installation Guide →

Get Mod Support with Bot 51

You can can now get automated mod support directly online!

Open Bot 51 in the lower right corner of your screen then ask a question or upload a Last Exception file or Lot 51 log file like lot51_core.log.

If you need human support you will need to Join the Discord community.

You can upload 5 files and ask 20 questions per day.

PlumbBros Documentation

Getting Started with PlumbBros

By default, PlumbBros is disabled until you activate it for the entire save, or add the Heating & Cooling lot challenge to a specific lot. You can activate it for the entire save by placing a Thermostat on the lot and toggling in the Settings. To get your HVAC system started, place an Outdoor Condenser Unit, Air Vents, and a Thermostat on the lot. Call PlumbBros from your Phone and receive a Consultation to learn more. Continue reading below to learn how to run your system and optimize savings.

Temperatures

To create a temperature flux between the indoors and outdoors, temperature will now be represented by Fahrenheit and Celsius!

More Realistic Billing

A core feature of the Seasons Thermostat is to increase your overall bills depending on which setting it is on. The way this works is by adding a multiplier to every electronic in your home. Which exponentially increases your bills based on the electronic objects you own. This is not anywhere close to how your Air Conditioning/Fans would affect your bills in real life??? Instead of affecting the cost of all other electronics, the PlumbBros HVAC System uses normal Power on its own which can incur high costs if it must run more often and can save money if it’s run less often from the temperature

Outdoor Condenser Unit

PlumbBros is inspired by a split air conditioning system. In real life homes, an Outdoor Condenser Unit is paired with an Indoor Furnace to pump refrigerant, filter, heat and cool. To keep things simple, only an Outdoor Condenser Unit is required with this mod. The Outdoor Condenser Unit is the most important component to managing temperature. Place this object outdoors near the wall. Be sure at least one side is unobstructed to allow access by sims for maintenance. The tooltip will show the current Refrigerant and Air Filter levels and should be maintained periodically by a technician. Learn

Ventilation

Another component to the split-system are ducts and vents distributed throughout your home to distribute air. Depending on the size of each level, you will need to place a specific number of Air Vents to ensure your system is heating and cooling at its maximum potential. If you do not have enough Air Vents, your Condenser Unit will need to run longer to reach your Preferred Temperature and may not succeed. You can ask your local PlumbBros technician to evaluate your home and provide the recommended number of vents for each level! To keep your sims happy and healthy, air will first be filtered

Thermostats

Commandeer your HVAC system with the HeyHoney Thermostat, Partnered with PlumbBros! The Thermostat included with the Seasons EP (and any object with the same Func_Thermostat tag) can also be used when PlumbBros gameplay has been enabled. They will return to their normal functionality when gameplay is disabled. Thermostats act as sensors to get a better reading of your home’s temperature. They are only able to sense the temperature of the level they are placed in. To ensure your entire home is heated and cooled comfortably you should place a thermostat on each level with ventilation. Toggle

Insulation

The best, but most expensive (in up-front costs) way to optimize savings and efficiency is to insulate your home. PlumbBros provides a Standard and Premium package of your choosing to keep your home at your Preferred Temperature longer. Pricing scales depending on the size your home, call PlumbBros for a Consultation to learn more. If you own Eco Lifestyle, the Eco Footprint of the world will affect the base insulation of your home. Green lots will stay at the Preferred Temperature longer than Industrial lots. Apartments in San Myshuno and Evergreen Harbor have a default insulation package

Roof Turbines

Roof Turbines provide a cheap alternative to balance the temperature of your home by expelling hot air and moisture trapped in the attic space. They will spin dynamically based on the wind conditions outside! The Base Game Turbine is still available as static décor.

No hot water icon
Hot Water & Water Heaters

Although not a component of HVAC, Hot Water is an important luxury Sim-kind has come to depend on for completing chores and staying clean. Taking Cold Showers can lower your Sims temperature but also be uncomfortable for most who do not Prefer the Cold. Purchase a Hot Water Heater Tank and place it on your lot to enjoy steamy hot showers. As water gets used the tank will deplete depending on the duration of your shower. The tooltip will show the Current Hot Water level to help plan showers and share hot water with the family, or not... Torendi Tower Penthouse, Spire Apartments, Alto Apartments

Home flooding icon
Water Main

Water has been provided on-the-grid since the ancient Tartosian times. It’s currently provided by the Alto Water Company, however the main pipes that run directly from the grid to the home are not serviced by Alto and are the responsibility of the homeowner! Place a Water Main Valve on the lot to control the Water Utility of your home. You can turn it on and off if your sim is strong enough to turn the valve. They’re quite pesky. It’s important to keep your entire home warm during freezing cold temperatures. If it gets too cold inside your pipes will begin to freeze and you will be at risk of

Apartments

Apartments in San Myshuno and Evergreen Harbor have a default insulation package based on the quality of the buildings and cannot be upgraded. Both buildings in Evergreen Harbor include Standard Insulation ZenView, 21 Chic Street, Hakim House and Medina Studios in San Myshuno also have Standard Insulation Torendi Tower Penthouse, Spire Apartments, Alto Apartments include Premium Insulation, plus Unlimited Hot Water (no water heater required). Fountainview Apartments, and Landgraab Apartments have Premium Insulation Jasmine Suites, and Culpepper Apartments are Uninsulated

HVAC Technician Active Career

Join PlumbBros and work your way up to an HVAC Specialist through a commission-based Active Career! Study HVAC Knowledge and share it with other Sims in your neighborhoods. Daily Work Orders will take your sim around town to complete tasks like providing Consultations, Repairing Condensers, Replacing Air Filters, Recharging Refrigerant, Insulation Installation, and Repairing Water Mains + Plumbing. Use the Technician Tablet in your Sim’s inventory to study knowledge and view daily work orders. NOTE: It’s recommended you opt your entire save into gameplay or opt in multiple lots, plus setup

error icon
Known Issues

CAS: Boots Category Missing - The boots category may disappear for an unknown reason. Boots are still visible in the main shoes category.

Required DLC
Seasons

PlumbBros 2.1.3

August 10, 2024
  • Fixed an issue on penthouse lots causing Thermostats to not be detected, triggering an HVAC “System Issue”.
  • Wall-Mounted HVAC appliances that are spawned on Residential Rentals will only be calculated into the system if they are attached to the active Unit.
  • Fixed an issue on apartment & penthouse lots where the Air Filter Quality or Refrigerant would be low when a condenser is provided for you in the background. Any additional Condensers/Air Cons placed will need Air Filter maintenance. Any additional Condensers will need Refrigerant maintenance.
  • Wall-Mounted Air Conditioner (For Rent) Air Filter Quality will now be calculated in for apartments.
  • You should now be able to ask a Technician to replace Air Filters when a Wall Mounted A/C has low Air Filter Quality (previously that interaction was only aware of Outdoor Condenser Units).

Download Release

PlumbBros 2.1.2

August 1, 2024
  • Lovestruck Patch: Fixes exceptions that occur after traveling to a new lot

Download Release

PlumbBros 2.1.1

July 28, 2024

New!

  • Cool off with the new Max Velocity Wall Fan! A functional version of the Single Basic Indoor Fan added in Lovestruck (The EP is required).

Patch Fixes

  • (1.9.1) Fixed an exception that occurs when traveling for a Work Order.
  • Fixed a change that would cause the Water Main to freeze faster than usual.

General Fixes

  • Air Quality will no longer stay permanently dirty when only using a radiator.
  • Musty buff will automatically remove when the quality changes while a Sim is inside. (Previously depended on them going outside to remove it)

Download Release

PlumbBros 2.1

July 27, 2024

New!

  • Cool off with the new Max Velocity Wall Fan! A functional version of the Single Basic Indoor Fan added in Lovestruck (The EP is required).

Patch Fixes

  • Fixed a change that would cause the Water Main to freeze faster than usual.

General Fixes

  • Air Quality will no longer stay permanently dirty when only using a radiator.
  • Musty buff will automatically remove when the quality changes while a Sim is inside. (Previously depended on them going outside to remove it)

Download Release

PlumbBros 2.0.4

March 29, 2024
  • Fixed an issue that caused Sim comfort zones to be calculated incorrectly, resulting in Sims being uncomfortable when they shouldn’t be.
  • Fixed an issue that prevented PlumbBros Water Heaters from being able to refill after it had emptied completely.
  • Technicians can now “Send Bill to Customer” from the Tech Tablet if the Customer can’t be found on the lot.

Download Release

PlumbBros 2.0.3

March 5, 2024
  • Updated to support changes made in Crystal Creations patch that would cause exceptions if certain random packs were missing.

Download Release

Download Languages

ENG_US English (Default Included Language)

Want your translation linked here?

Upload your package to a mod sharing service like Curseforge or SimFileShare then submit the link to me.

Unfortunately, translations are no longer included in my mods.

hvac.break_pipes

Break the Water Main

hvac.clear_trends

Clear the recent Usage Trend logs

hvac.destroy_spawners

Removes all broken pipe water sprayers on lot

hvac.fix_pipes

Instantly repair the Water Main

hvac.live_stats

Toggles live hvac telemetry. Open the lot51_hvac.log file to view all the stats of the HVAC system in real time.

hvac.make_comfortable

Instantly Make Home Comfortable, or with testing cheats enabled, shift click the Mailbox or Thermostat to “Make Home Comfortable”. This will set every level to 72˚F.

hvac.place_spawners

Spawns multiple broken pipe water sprayers

hvac.puddle

Spawn a random puddle

hvac.restore_water

Restore the Water Utility

hvac.shutoff_water

Turn off the Water Utility

hvac.super_mop

Instantly clean up all puddles on lot