Retrofit Relay
Cost guides · written by contractors

Know what it should cost before you call.

Real installed prices, sizing basics, and which rebates apply — plus how to sequence the project, read the quotes, and get through install day. Written by people who install this stuff for a living.

02 · Project guides

For the project, not just the product

The upgrade guides above cover what things cost. These cover how the whole project goes: what order, whether the quote is fair, and what happens when the crew shows up.

Stage 1 · Tools

What size heat pump do you need?

A 30-second starting range by climate and envelope — and why the real number comes from a load calculation on your house.

Run the sizing calculator
Stage 1 · Tools

What should insulation cost?

Attic, walls, or basement — a budgeting range from published per-square-foot pricing, before the rebates that often cover much of it.

Run the cost calculator
Stage 1 · Costs

Heat pump vs furnace: running cost

Cost per million BTU for heat pumps vs gas, oil, propane, and baseboard at current prices — with the formula to run your own rates.

See the math
Stage 1 · Costs

Attic insulation cost

Per-square-foot prices by material, worked examples by attic size, and why this is the most-subsidized work in home energy.

Read the cost guide
Stage 1 · DIY

DIY home energy audit

Five stops, one hour: find your home's leaks, thin insulation, and aging equipment before you spend a dollar on fixes.

Walk the checklist
Stage 1 · DIY

Air sealing: DIY vs contractor

The honest split: weatherstripping and outlet gaskets are yours; the attic plane and blower-door work belong to a pro.

See what's yours
Stage 2 · Planning

What order to do it in

Envelope first, equipment second — why the sequence matters, and how to phase a retrofit to your budget and your rebates' deadlines.

Read the sequencing guide
Stage 2 · Planning

Weatherize before the heat pump

A tighter house needs a smaller, cheaper heat pump. The ordering decision that saves more than any equipment discount.

Read the ordering guide
Stage 2 · Planning

Whole-home electrification plan

Room by room, phase by phase: heat pump, water heater, induction, and the panel — in the order that saves money.

Read the plan
Stage 3 · Hiring

Questions for your installer

The 15 questions that separate real heat pump installers from equipment swappers — same list, every walkthrough.

Get the checklist
Stage 4 · Quotes

How to read a quote

What belongs on a heat pump or insulation quote, typical installed prices, and the red flags that mean keep shopping.

Read the quote guide
Stage 4 · Quotes

Heat pump installation cost

Why two bids on the same house differ by ten grand: the five drivers behind the $14,000–$25,000 whole-home range.

See the drivers
Stage 5 · The job

What to expect during the work

What good work looks like at each milestone, the final-payment checklist, and how to claim your rebates after install.

Read the installation guide
Stage 5 · After

Claim your rebates after install

The document kit, the application walkthrough, and the rejection reasons — plus the 2026 federal tax credit reality.

Get your money
Stage 5 · After

First-year heat pump care

Month one, the filter rhythm, what's normal in winter, and the 12-month service visit that matters most.

Read the owner's checklist
04 · Stay current

Rebate programs change. We track the changes.

Program amounts, deadlines, and eligibility shift throughout the year. Our news feed follows the updates that affect what you can claim.

Done reading? Get real numbers for your home.

Tell us about your project and we'll match you with up to 3 licensed local contractors. Every quote itemizes the rebates you qualify for. Free, no obligation.

Get free quotes