A plumber or HVAC owner who writes to homeowners gets one job at a time. One who writes to the person who looks after a building gets a standing agreement: quarterly filter changes, boiler checks, a water heater flush each spring, and first call when something breaks. These templates are for that second kind of email, and each one asks for a short site visit, not a decision.

The examples follow Rosa Delgado, who runs Delgado Heating & Plumbing in Rochester with four technicians. Everything here is invented, so change the numbers to match your own prices and area. Three emails, one follow-up, then subject lines, what to cut, and the legal basics.

Buildings where a failed boiler or pipe costs real money

You want buildings where a failure is expensive and nobody on staff fixes it: restaurants, small medical and dental offices, churches, schools, self-storage and apartment buildings of 8 to 60 units. The person to find is whoever signs the vendor invoices. In an apartment complex that's the property manager or the owner. In a restaurant it's the owner or general manager. In a church it's usually a trustee or the office administrator.

Heating and cooling work is seasonal, so write 4 to 8 weeks before the season starts. A boiler tune-up email in September lands better than one in January, when the boiler is already down. For more on the plumbing and HVAC side of getting customers, see getting customers for a plumbing business, getting customers for an HVAC company, and the home services page.

Subject lines that fit plumbers and HVAC companies

Name the equipment or the building: "Boiler check before winter at 220 Main," "Annual flush for your water heaters," "Backup HVAC vendor for Pine Court." Don't use "Service agreement opportunity," which reads like a form letter. A subject that names a street or a piece of equipment tells the reader it was written about them.

Email 1: the maintenance agreement

Subject: Boiler check before winter at Lakeview Dental

Hi Dr. Anders,

I'm Rosa with Delgado Heating & Plumbing in Rochester. We do planned maintenance for small offices: one visit in the fall and one in spring, a written report, and priority if anything stops working.

For a building your size it runs $380 a year. Could I look at the boiler and rooftop unit next week and send you a written quote? Fifteen minutes on site.

Rosa Delgado, 1105 Monroe Ave, Rochester NY 14620. If you'd rather not hear from me, reply "stop."

Why it works: it offers something concrete (two visits, a report, priority) with a price, so there's nothing to decode. The ask is to look at the equipment, which a doctor can approve in ten seconds. When to send it: late August through September for heating, March through April for cooling. If you can't give a price yet, say "typically between $300 and $500 a year depending on the equipment" and mean it.

Email 2: the vendor intro to an apartment building owner

Owners of small apartment buildings tend to call whoever answers first. The goal of this email is to be the one in their phone before the emergency.

Subject: Plumber on call for Pine Court

Hi Jerome,

When a tenant calls at 9 p.m. with a burst pipe or no heat, who do you call? If the answer is "whoever picks up," I'd like to be the one.

I'm Rosa at Delgado Heating & Plumbing. We answer after-hours calls for a handful of buildings in Rochester, with a 2-hour response on no-heat and active leaks. I'd like to walk Pine Court, note the shutoffs and boilers, and keep it on file for you.

Rosa Delgado, 1105 Monroe Ave, Rochester NY 14620. Reply "stop" and I won't write again.

Why it works: the opening question describes his actual 9 p.m. problem, and the walkthrough is useful to you both. Knowing where the shutoffs are is a real service, and it makes you faster on the night. When to send: any time, but especially the first cold week of the year, when owners get their first no-heat calls. Don't promise a response time you can't keep. Rosa has two technicians on a rotating on-call schedule, which is what makes "2 hours" honest.

Email 3: the church, school or club facility manager

Facility managers at community buildings have little budget and big buildings. Lead with preventing a problem and be plain about price.

Subject: Furnace inspection for St. Anne's hall

Hi Carol,

I'm a heating contractor in Rochester. Many church halls have a furnace that runs only on weekends and Wednesday nights, which means a failure is usually found when people arrive in the cold.

I can inspect yours for $95 before winter and tell you what's likely to fail this year and what can wait. No pressure to hire us for repairs.

Rosa Delgado, Delgado Heating & Plumbing, 1105 Monroe Ave, Rochester NY 14620. If you'd rather not hear from me, reply "stop."

Why it works: it names a real failure pattern, offers a low-priced inspection and explicitly lets her say no to repairs. When to send: early fall, and again at the start of the cooling season for churches with air conditioning. Check that you can inspect for $95 profitably (a 45-minute visit and a one-page report), or raise the price. Underpricing the first visit to win the work only pays if you follow up.

The follow-up that offers a boiler check before winter

Subject: Re: Boiler check before winter at Lakeview Dental

Hi Dr. Anders, in case my note got buried: I can look at the boiler any morning next week. If someone in your office handles the building, tell me who and I'll send it to them. Rosa

Send one more a week after that with a single new fact, like "we still have two spots left for pre-winter checks," only if it's true. Then stop for three months. If you want those follow-ups sent while your crew is on jobs, the AI workers can send them from your own Gmail and read replies.

What to leave out of a plumbing or HVAC email

Leave out the full service menu (water heaters, drain cleaning, tankless conversions, duct cleaning, 24/7 emergency). Pick the one thing the reader would buy. Leave out your years in business unless it's specific, like "we've serviced boilers on Monroe Avenue since 2009." Skip discount coupons, stock photos of smiling technicians, and any claim you can't back up, such as "lowest price in town." Don't mention the competitor you're replacing, even if you know who it is.

CAN-SPAM, trade licenses and texting consent

CAN-SPAM, the US law for commercial email, requires an honest From line and subject, your real postal address and an opt-out you honor promptly, so don't email anyone who has said stop. Trade rules add more. Plumbing and HVAC licenses are issued by states or cities, and many require your license number on advertising and vehicles, so put it in your signature if yours does. Mention EPA Section 608 refrigerant certification only if you hold it. Texting is a separate rule set: don't text people who haven't given consent. Our piece on where cold email stops and spam starts goes through the email side.

Sending a first batch of 40 buildings

Use a Google account on your company's domain, send as yourself, and keep volume low at first, roughly 20 to 50 a day per inbox. A list of 40 buildings is a healthy first batch, and the season decides when the email lands: boiler checks in early fall, cooling tune-ups in spring. Rocketship can find property managers, facility managers and owners by area and building type, show you the first 25 by name before you spend any credit, and send from your own Gmail with follow-ups. For related templates, see cold email templates for contractors and cold email templates for cleaning companies.

Maintenance agreements turn one-time calls into steady revenue, and the first emails are only a few sentences each. Rocketship finds the buyers, emails them from your own Gmail, follows up, and books the meeting on its own. Plans that get you customers start at $24.99 a month (Launch), and every monthly plan starts with a 7-day free trial, card required.