What is First Hour Rating (FHR)?

FHR is the amount of hot water a heater can deliver in a single hour. This MCP calculates this value to ensure you have enough hot water during peak demand.

Can I use this for commercial buildings?

Yes. The MCP includes capabilities to calculate tank capacity and FHR specifically for commercial usage profiles.

How does it compare different fuel types?

The get_efficiency_comparison capability provides Energy Factor (EF) benchmarks for gas, electric, and heat pump technologies.

Which AI clients can use this MCP?

You can use this with any MCP-compatible client like Claude, Cursor, Windsurf, or VS Code.

Do I need to host the MCP myself?

No. Vinkius hosts and manages the MCP for you. You just connect your client and start using the capabilities.

How do I calculate the required FHR?

Use the calculate_frl_requirement capability by providing the number of occupants, whether the usage is residential or commercial, and the heating fuel type (gas, electric, or heat pump).

What factors affect the tank capacity recommendation?

The recommended capacity is based on the number of occupants and the usage type. Commercial profiles use a higher multiplier to account for more frequent, continuous demand.

Can I compare different fuel types?

Yes, you can use the get_efficiency_comparison capability to see Energy Factor (EF) benchmarks for gas, electric resistance, and heat pump technologies.

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Connect Water Heater Sizing Calculator to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Get precise sizing and efficiency data for hot water systems.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through Water Heater Sizing Calculator.

01
Calculate fhr requirement
This capability determines the required First Hour Rating (FHR) to meet specific hot water demand. It uses occupant numbers, usage type, and fuel recovery rates to find the right value.
02
Calculate tank capacity
This capability calculates the recommended minimum tank volume in gallons. It analyzes occupancy patterns to ensure the tank meets the needs of the building.
03
Get efficiency comparison
This capability provides a comparison of Energy Factor (EF) benchmarks. It helps you see how gas, electric, and heat pump technologies stack up against each other.

Real work

What teams actually run

Residential Design

Calculate the exact tank size and FHR needed for a single-family home based on the number of residents.

Commercial Planning

Determine large-scale water heating requirements for buildings with high occupancy counts.

Efficiency Upgrades

Compare the Energy Factor of a current gas unit against a proposed heat pump installation.

System Audits

Verify if an existing water heater meets the demand requirements for the current occupants.

Automate a task

Put Water Heater Sizing Calculator to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

How to compare efficiency

One connector, every AI

Water Heater Sizing Calculator works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

Building your own app? The connector is yours to use.

You don't need a client to put Water Heater Sizing Calculator to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

705ms average. Fast in production.

Water Heater Sizing Calculator is checked daily against the live service.

Daily averagePeak 890ms

Oct 3Today

Fastest day: 533ms
Slowest day: 890ms
14-day trend: Improving-7%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Water Heater Sizing Calculator, so you can see the experience inside your AI.

It does not authenticate your account with Water Heater Sizing Calculator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Water Heater Sizing Calculator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_nr7TIpWriAAy32tr1iHsvUpKnQRaTMVuG0hpxPJ7/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — Water Heater Sizing Calculator capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "water-heater-sizing-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_nr7TIpWriAAy32tr1iHsvUpKnQRaTMVuG0hpxPJ7/mcp"
    }
  }
}

Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Water Heater Sizing Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Water Heater Sizing Calculator owners hand off.

This MCP is built for professionals working in building design and mechanical systems.

01
Plumbing Professionals
They use the capability to specify correct equipment for residential and commercial installs.
02
Mechanical Engineers
They use it to calculate system requirements and efficiency benchmarks during the design phase.
03
Energy Auditors
They use the efficiency comparison capability to evaluate existing or proposed water heating setups.

FAQ

Questions Water Heater Sizing Calculator owners ask.

01
What is First Hour Rating (FHR)?
FHR is the amount of hot water a heater can deliver in a single hour. This MCP calculates this value to ensure you have enough hot water during peak demand.
02
Can I use this for commercial buildings?
Yes. The MCP includes capabilities to calculate tank capacity and FHR specifically for commercial usage profiles.
03
How does it compare different fuel types?
The get_efficiency_comparison capability provides Energy Factor (EF) benchmarks for gas, electric, and heat pump technologies.
04
Which AI clients can use this MCP?
You can use this with any MCP-compatible client like Claude, Cursor, Windsurf, or VS Code.
05
Do I need to host the MCP myself?
No. Vinkius hosts and manages the MCP for you. You just connect your client and start using the capabilities.
06
How do I calculate the required FHR?
Use the calculate_frl_requirement capability by providing the number of occupants, whether the usage is residential or commercial, and the heating fuel type (gas, electric, or heat pump).
07
What factors affect the tank capacity recommendation?
The recommended capacity is based on the number of occupants and the usage type. Commercial profiles use a higher multiplier to account for more frequent, continuous demand.
08
Can I compare different fuel types?
Yes, you can use the get_efficiency_comparison capability to see Energy Factor (EF) benchmarks for gas, electric resistance, and heat pump technologies.

Explore

More in Construction

Connect Water Heater Sizing Calculator to Claude, Cursor, ChatGPT & more

Your AI does the work. We keep it safe and sound.

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

Calculate fhr requirement

Calculate tank capacity

Get efficiency comparison

What teams actually run

Residential Design

Commercial Planning

Efficiency Upgrades

System Audits

Building your own app? The connector is yours to use.

Water Heater Sizing Calculator Connector

Claude Desktop

Plumbing Professionals

Mechanical Engineers

Energy Auditors

What is First Hour Rating (FHR)?

Can I use this for commercial buildings?

How does it compare different fuel types?

Which AI clients can use this MCP?

Do I need to host the MCP myself?

How do I calculate the required FHR?

What factors affect the tank capacity recommendation?

Can I compare different fuel types?

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